Guidelines on Management of Human Infection with the Novel Virus Influenza A (H1N1) – A Report from the Hospital das Clínicas of the University of São Paulo

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São Paulo/SP, Brazil., Tel.: 55 11 3069.6431" "etiqueta" => "XI" "identificador" => "afXI-cln_64p1015" ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "f1-cln_64p1015" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 948 "Ancho" => 961 "Tamanyo" => 54041 ] ] "descripcion" => array:1 [ "en" => "Spectrum of novel influenza A (H1N1) infection" ] ] ] "textoCompleto" => "1. INTRODUCTIONIn April 2009, the first two cases of human infection with a novel influenza A (H1N1) virus were reported in the United States.<a class="elsevierStyleCrossRef" href="#bib1">1</a> During the same period, an outbreak of respiratory infection was reported in Mexico.<a class="elsevierStyleCrossRef" href="#bib2">2</a> The virus was found to be an H1N1 virus that was antigenically and genetically unrelated to human seasonal influenza viruses and genetically related to viruses known to circulate in swine.<a class="elsevierStyleCrossRef" href="#bib3">3</a> In the ensuing weeks, the swine-origin influenza virus (S-OIV) H1N1 spread worldwide, constituting a pandemic, as defined by the World Health Organization.<a class="elsevierStyleCrossRef" href="#bib4">4</a> The novel H1N1 virus has distinct molecular properties of human, avian, and swine influenza, resulting from antigenic drift, which is the main cause of the seasonal epidemic of swine flu.<a class="elsevierStyleCrossRef" href="#bib4">4</a>As of September 13, 2009, the S-OIV caused over than 296.471 virologically confirmed human cases and at least 3.486 deaths in countries worldwide.<a class="elsevierStyleCrossRef" href="#bib5">5</a> Almost five months after the description of the first cases, the pandemic S-OIV infection continues to spread globally, presents a high rate of transmission among humans, and can lead to serious complications and mortality. The purpose of this guideline is to review the evidence concerning diagnosis, prevention, and treatment of S-OIV infection. In addition, we emphasize the Hospital das Clínicas’ plan for the management of the pandemic novel influenza A (H1N1). This report is an initiative from the “Cabinet Crisis” - a group of healthcare professionals at the Hospital das Clínicas da Faculdade de Medicina da Unversidade de São Paulo who continuously evaluate the “bundles” for control of S-OIV infection, meaning the groups of interventions and advertisements, to obtain better outcomes in the management of this disease.2. HISTORICAL ASPECTSAn estimated 58% of the 1407 human pathogens are zoonotic, which means that they normally occur in animals but can also infect humans.<a class="elsevierStyleCrossRef" href="#bib6">6</a> The ability of a microorganism to cross the species barrier in association with a high transmissibility rate between humans may result in epidemics. The novel influenza A (H1N1) virus, which is responsible for the current pandemic, is derived from two unrelated swine viruses, one of which is a derivative of the 1918 human virus.<a class="elsevierStyleCrossRef" href="#bib3">3</a> The notorious 1918 pandemic of influenza A (H1N1), the Spanish flu, was derived from an avian source and caused 50 million deaths.<a class="elsevierStyleCrossRef" href="#bib6">6</a> Some authors proposed that the virus resided in an avian reservoir and affected humans either directly upon exposure to birds or through an intermediate host.<a class="elsevierStyleCrossRef" href="#bib7">7</a> As the 1918 influenza virus can replicate and cause disease in swine, scientists believe that it has continued to circulate in swine and this fact would facilitate the genetic reassortment between different influenza virus strains.<a class="elsevierStyleCrossRef" href="#bib8">8</a>A practical way to think about influenza A events over the past 91 years is to recognize that we are living in a pandemic era that began in 1918. The novel H1N1 virus associated with the ongoing 2009 pandemic is a fourth-generation descendant of the 1918 virus. The complex evolutionary history of this virus combines unique structural properties and genetic mixing among human viruses and avian and swine-adapted influenza viruses.<a class="elsevierStyleCrossRef" href="#bib9">9</a> Two features of the influenza virus explain its ability to cause widespread disease. One is the high error rate during genomic replication.<a class="elsevierStyleCrossRefs" href="#bib9">9,10</a> The other is the segmented influenza virus genome, which allows reassortment between different viral strains.<a class="elsevierStyleCrossRefs" href="#bib9">9,10</a> Because of this continual change phenomenon, a seemingly endless variety of new viruses with potentially new properties are continuously being engineered. In contrast, this new virus is not only infecting humans and causing some disease, but it is also being transmitted efficiently from human to human.3. EPIDEMIOLOGYThe pandemic novel influenza A (H1N1) infection was considered as widespread in Brazil on July 16.<a class="elsevierStyleCrossRef" href="#bib11">11</a> Since then, the Ministry of Health in Brazil, as suggested by the World Health Organization, has maintained a continuous epidemiologic vigilance of cases of acute respiratory syndrome (ARS). The strategy of vigilance considers any persons with flu syndrome as potential cases of influenza A (H1N1) and designates these individuals as presenting acute respiratory syndrome patients with cough, dyspnea, and fever.Until now, 46.810 cases of ARS were reported notified in Brazil.<a class="elsevierStyleCrossRef" href="#bib12">12</a> Of these, 9.249 (20%) patients presented infection with S-OIV or influenza A (H1N1). Seasonal influenza A infection was confirmed in 1.152 (2.5%) patients.<a class="elsevierStyleCrossRef" href="#bib11">11</a>The observed age distribution is unusual and differs from seasonal influenza, being skewed towards younger age groups. There is a marked underrepresentation of infections in persons over 65 years of age, who make up only 2% of the reported cases. In Brazil, among the reported cases, the affected individuals tend to be young, with a median age of 26 years. Most patients are 15–49 years of age. Considering the gender distribution, 57.5% of the confirmed cases of novel virus influenza A (H1N1) occur in women.<a class="elsevierStyleCrossRefs" href="#bib11">11,12</a>.Among these 9.249 confirmed cases in Brazil, 899 deaths are reported with mortality rate of 0,47/per 100.000 inhabitants.<a class="elsevierStyleCrossRef" href="#bib11">11</a> All Brazilian states have reported cases of S-OIV infection, with the exception of Sergipe. Most cases and deaths are concentrated in São Paulo, but major mortality rate was observed in Paraná (2,08/100.000 inhabitants).As of September 12, 2009, 13.069 cases of ARS were registered in São Paulo and 3.733 are due to novel influenza A (H1N1) infection.<a class="elsevierStyleCrossRef" href="#bib11">11</a> São Paulo state registers 40.3% (3.733 of 9.249) of all confirmed cases from Brazil, the majority identified in the city.The Hospital das Clínicas of Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP) is the largest tertiary health care hospital in Brazil, with 6 medical institutes and other associated hospitals, and is a reference center for H1N1 cases in São Paulo. Three months after the report of the first case of novel H1N1 infection in Brazil, the Hospital das Clínicas has accumulated experience with about 1500 cases registered and 472 confirmed with a low lethality rate (7.14%).The management of this disease requires specific knowledge and the expertise to provide an adequate diagnosis and treatment of patients. With the goal of obtaining better outcomes in diseased patients, the Hospital Council established a “Cabinet Crisis” to continuously obtain information from Health Organs, Epidemiological Surveillance Systems and from literature regarding epidemiological data and clinical presentations of S-OIV infection and to provide an adequate structure for the care of patients.4. PATHOGENESISInfluenza A, B, and C are RNA viruses of the Ortomyxoviridae family and cause both pandemic and seasonal disease in humans.<a class="elsevierStyleCrossRef" href="#bib14">14</a> Influenza A viruses are enveloped, single-stranded RNA viruses with a segmented genome. They are categorized into subtypes on the basis of the antigenic properties of the hemagglutinin (HA) and neuraminidase (NA) glycoproteins on the surface of the virus.<a class="elsevierStyleCrossRef" href="#bib14">14</a> The HA glycoprotein mediates attachment and entry of the virus on the cell surface and is the main target for immunity by neutralizing antibodies. The NA glycoprotein allows the spread of the virus by cleaving the glycosidic linkages to sialic acid on host cells and on the surface of the virus.<a class="elsevierStyleCrossRef" href="#bib15">15</a> Influenza A viruses are characterized according to their pathogenicity, which results in severe disease and death in different species. This S-OIV results from frequent antigenic changes (i.e., antigenic drift) due to point mutations and recombination events that occur during viral replication.<a class="elsevierStyleCrossRef" href="#bib15">15</a> The novel influenza A (H1N1) virus is not a new subtype, but because the large majority of humans appear to have no pre-existing antibodies to this virus, a substantial potential for widespread infection exists.<a class="elsevierStyleCrossRefs" href="#bib14">14,15</a>The novel influenza A (H1N1) virus has distinct properties that enable it to cause disease in both swine and humans and confers high rates of transmissibility among humans. The pathogenesis of human infection due to S-OIV is poorly understood, but appears to involve two phenomena: a) direct cytotoxic viral damage and b) a cytokine storm, resulting from the inflammatory response to viral infection.<a class="elsevierStyleCrossRefs" href="#bib16">16,17</a> The interaction between host and virus may result in different forms of disease, depending on the viral load and the inflammatory response. In patients with co-morbidities, host mechanisms of defense may be defective and such patients can present an altered innate immune response. In the most severe cases, co-infection with other viruses and bacteria (Streptococcus pneumoniae, Haemophilus influenza, and Staphylococcus aureus) can occur contributing to the high rates of mortality.<a class="elsevierStyleCrossRef" href="#bib18">18</a>There is no evidence to date suggesting that the virus disseminates any differently from other human influenza viruses, i.e., by droplets from coughing and sneezing and direct and indirect contact with respiratory secretions from infected persons.<a class="elsevierStyleCrossRef" href="#bib19">19</a> An individual may sometimes become infected by touching something contaminated with flu viruses and then touching his or her mouth or nose.<a class="elsevierStyleCrossRef" href="#bib19">19</a> There is no evidence to suggest unusual transmission routes for influenza, and there is no reason to suggest transmission via food. Patients may be contagious from one day before developing symptoms to up to 7 days after they get sick.<a class="elsevierStyleCrossRefs" href="#bib19">19,20</a> Children and persons with deficient immunity might be contagious for longer periods of time.<a class="elsevierStyleCrossRef" href="#bib20">20</a>5. CLINICAL FEATURESHuman infection with the novel virus influenza A (H1N1) is characterized by a variable clinical presentation. We can describe a spectrum of disease presentations: the asymptomatic form, “flu-like syndrome”, and the severe form with acute respiratory distress syndrome leading to death (<a class="elsevierStyleCrossRef" href="#f1-cln_64p1015">Figure 1</a>).<a class="elsevierStyleCrossRef" href="#bib21">21</a> The majority of patients present the “flu-like syndrome” with fever, myalgia, sore throat, arthralgia, cough, headache, chills, and fatigue.<a class="elsevierStyleCrossRefs" href="#bib22">22,23</a> Fever is the most frequent symptom and usually lasts for three days. Respiratory symptoms generally disappear three or four days after the fever ends. Diarrhea, emesis, and weakness can be present in a significant number of cases.<a class="elsevierStyleCrossRefs" href="#bib22">22,23</a><elsevierMultimedia ident="f1-cln_64p1015"></elsevierMultimedia>Despite the fact that in most patients the disease has a benign evolution and a limited duration, some patients may present respiratory failure, rapidly developing acute respiratory distress syndrome.<a class="elsevierStyleCrossRefs" href="#bib24">24,25</a> Published data describe systemic disease and complications due to S-OIV infection such as:<a class="elsevierStyleCrossRefs" href="#bib22">22,23</a><ul class="elsevierStyleList" id="celist10"><li class="elsevierStyleListItem" id="celistitem10">a.Worsening of previous existing disease</li><li class="elsevierStyleListItem" id="celistitem20">b.Sinusitis, otitis, asthma</li><li class="elsevierStyleListItem" id="celistitem30">c.Pneumonia, acute lung injury, respiratory failure</li><li class="elsevierStyleListItem" id="celistitem40">d.Pericarditis, myocarditis</li><li class="elsevierStyleListItem" id="celistitem50">e.Myositis, rhabdomyolysis</li><li class="elsevierStyleListItem" id="celistitem60">f.Acute renal failure due to acute tubular necrosis</li><li class="elsevierStyleListItem" id="celistitem70">g.Encephalitis, seizures</li><li class="elsevierStyleListItem" id="celistitem80">h.Systemic inflammatory response syndrome</li><li class="elsevierStyleListItem" id="celistitem90">i.Multiple organ failure</li><li class="elsevierStyleListItem" id="celistitem100">j.Death</li></ul>The reported cases reveal that about 70% of patients who die or present severe forms of the disease have underlying conditions.<a class="elsevierStyleCrossRefs" href="#bib22">22,23,24,25,26,27</a> Risk groups for hospitalization and severe disease due to S-OIV infection are:<ul class="elsevierStyleList" id="celist20"><li class="elsevierStyleListItem" id="celistitem110">a.Individuals with underlying chronic diseases: data show that most patients hospitalized due to the need for care present co-morbidities, such as: asthma, chronic obstructive airways disease, diabetes, immunocompromise, chronic cardiovascular disease, chronic renal failure, epilepsy, obesity, and cancer.<a class="elsevierStyleCrossRefs" href="#bib22">22,23,24</a></li><li class="elsevierStyleListItem" id="celistitem120">b.Pregnant women: studies report that pregnant women infected with S-OIV have a four to five times greater chance of being hospitalized than healthy pregnant women and present more severe forms of the disease.<a class="elsevierStyleCrossRefs" href="#bib25">25,26</a></li><li class="elsevierStyleListItem" id="celistitem130">c.Young children: children under two years of age present high rates of hospitalization and death.<a class="elsevierStyleCrossRef" href="#bib27">27</a></li><li class="elsevierStyleListItem" id="celistitem140">d.Older individuals: persons 65 years and older have a high likelihood of needing hospital care and exhibit a high case fatality rate.<a class="elsevierStyleCrossRefs" href="#bib23">23,24</a></li></ul>From these analyses we can describe a list of risk groups, i.e., groups that experience more severe infections than the general population (<a class="elsevierStyleCrossRef" href="#f2-cln_64p1015">Figure 2</a>).<elsevierMultimedia ident="f2-cln_64p1015"></elsevierMultimedia>Pregnant women have a potential for complicated disease. For that, in Hospital das Clínicas, there is a specific protocol of care for this group, which include hospital admission in suspected or confirmed cases with clinical complications and a careful vigilance system for mild forms of disease with home treatment.5.1 Hospital admissionTo date, most human cases of new influenza A (H1N1) virus infection have exhibited an uncomplicated illness of limited duration. Hospitalization or antiviral therapy is therefore not likely to be required for most patients. Supportive care includes antipyretics, such as dypirone or acetaminophen for fever or pain, and fluid rehydration that can be provided as needed.<a class="elsevierStyleCrossRef" href="#bib22">22</a>The specific risk factors that predict an increased risk of progressive disease are incompletely understood. Clinicians and caregivers should watch for signs of possible clinical deterioration (for example, difficulty breathing, chest pain, coughing up colored sputum, dyspnea, altered level of consciousness, and confusion) and refer immediately such patients to the hospital. Clinicians should also take into account any underlying co-morbidities, the already described risk groups (such as immunocompromising conditions, pre-existing chronic lung or cardiovascular disease, diabetes, pregnancy, and young age).Patients who present one or more of the following signs and symptoms must be hospitalized in an intensive care unit:<ul class="elsevierStyleList" id="celist30"><li class="elsevierStyleListItem" id="celistitem150">a)Hemodynamic instability</li><li class="elsevierStyleListItem" id="celistitem160">b)Acute respiratory failure</li><li class="elsevierStyleListItem" id="celistitem170">c)Extensive lung compromise on chest X-ray</li><li class="elsevierStyleListItem" id="celistitem180">d)Severe hypoxemia</li><li class="elsevierStyleListItem" id="celistitem190">e)An PO2/FiO2 < 300, characteristic of acute lung injury</li><li class="elsevierStyleListItem" id="celistitem200">f)Compromise of other organs: acute renal failure, myositis, encephalitis, and other</li><li class="elsevierStyleListItem" id="celistitem210">g)Organ dysfunction</li></ul>5.2 Intensive care5.2.1 Ventilatory support: until now, there has been no unique, definite pattern of lung disease. Patients who present serious hypoxemia may present different forms of lung damage.<a class="elsevierStyleCrossRefs" href="#bib23">23,24</a> Most patients present diffuse alveolar damage, but localized disease, bronchiolitis, lobar pneumonia, and pleural effusion may be present. Ventilator support indications will then depend on the clinical condition of the patients, evaluated through signs, symptoms, and laboratory analysis (including arterial gas).<ul class="elsevierStyleList" id="celist40"><li class="elsevierStyleListItem" id="celistitem220">- Non-invasive ventilation (NIV): despite the theoretical risk of aerosol production with this modality, we recommend NIV in patients with hypoxemia due to the reduced rates of orotracheal intubation. Indications for and limitations of this method in patients with S-OIV infection are the same as those for patients with respiratory failure due to other etiologies.<a class="elsevierStyleCrossRef" href="#bib28">28</a> NIV should be used in patients without hemodynamic instability or consciousness alterations.<a class="elsevierStyleCrossRefs" href="#bib28">28,29</a> The preferred modality is the BiPAP, with inspiratory pressure (IPAP) and expiratory pressure (EPAP) adjusted independently. After selecting and fitting the mask, the recommended initial settings are IPAP = 8–12 cmH2O and EPAP = 3–5 cmH2O. The IPAP is increased gradually as tolerated, with the therapeutics goals of dyspnea relief, good patient-ventilator synchrony, and improved gas exchange. The EPAP may be increased as needed for alveolar recruitment.</li><li class="elsevierStyleListItem" id="celistitem230">- Invasive ventilation:</li><li class="elsevierStyleListItem" id="celistitem240">- Treatment of ARDS associated with new influenza A (H1N1) virus infection should be based on published evidence-based guidelines for sepsis-associated ARDS.<a class="elsevierStyleCrossRefs" href="#bib29">29,30</a> Lung-protective mechanical ventilation strategies should be used. The rationale is not to cause damage of non-affected areas. We recommend the following therapy:<ul class="elsevierStyleList" id="celist50"><li class="elsevierStyleListItem" id="celistitem250">a)Ventilatory mode: most ARDS patients are ventilated using conventional volume-cycled positive-pressure ventilators. Most studies using low tidal volume for ARDS employed this mode.<a class="elsevierStyleCrossRefs" href="#bib29">29,30</a> However, no differences in outcomes are detected if pressure-controlled ventilation is chosen, since the low tidal volume strategy is reached.</li><li class="elsevierStyleListItem" id="celistitem260">b)Oxygen: treatment of hypoxemia in ARDS induced by H1N1 virus is almost always initiated using 100% oxygen (FIO2 = 1.0), and the concentration of O2 is reduced with the goal of maintaining a PaO2 greater than 60 mmHg (arterial O2 saturation of about 90%). The FIO2 should be lowered to less than 0.5 as soon as possible to reduce the risk of lung damage due to oxygen toxicity.</li><li class="elsevierStyleListItem" id="celistitem270">c)Positive End-Expiratory Pressure (PEEP): Positive end-expiratory pressure works by counteracting the tendency toward alveoli collapse during pulmonary edema, low lung volume, and loss of surfactant.<a class="elsevierStyleCrossRef" href="#bib31">31</a> In ARDS, the majority of the lung is atelectatic.<a class="elsevierStyleCrossRef" href="#bib29">29</a> PEEP recruits partially collapsed areas, improving gas exchange.<a class="elsevierStyleCrossRef" href="#bib31">31</a> However, in some cases it is associated with barotrauma, pneumothorax, lung injury, inflammation, a cardiac output decrease, and shock.<a class="elsevierStyleCrossRef" href="#bib32">32</a> Consequently, we recommend a PEEP level between 5 and 12 cm H2O in most patients, and we can adjust the PEEP levels using a combination of the PV curve, the response of arterial blood gases, the hypothetical maximum and minimum PEEP values, and the hemodynamic response.</li><li class="elsevierStyleListItem" id="celistitem280">d)Low-tidal-volume strategy: the most important development in the management of ARDS is that mechanical ventilation with a lower tidal volume than previously used is associated with an improved clinical outcome.<a class="elsevierStyleCrossRefs" href="#bib29">29,30</a> This type of ventilation has been termed as the low-tidal volume or lung-protective strategy. The best risk:benefit ratio would be gained with a tidal volume of 6 ml/Kg or less, to reach a target plateau pressure of less than 30 cm H2O.<a class="elsevierStyleCrossRef" href="#bib30">30</a></li><li class="elsevierStyleListItem" id="celistitem290">e)Recruitment maneuvers and the prone position: recruitment maneuvers and the prone position must be reserved for refractory hypoxemia, as in other cases of ARDS.<a class="elsevierStyleCrossRefs" href="#bib33">33,34</a></li></ul></li></ul>5.2.2 Hemodynamic support: Patients admitted to the intensive care unit with S-OIV infection and ARDS may present shock. It is of main importance to maintain hemodynamic goals in these patients to avoid organ failure. Fluid management in this population should be performed carefully. Current evidence indicates that a net negative balance is desirable in ARDS.<a class="elsevierStyleCrossRef" href="#bib35">35</a> However, in these patients, hypovolemia must be avoided. Therefore, we recommend dynamic evaluation of the fluid status and a more conservative strategy for fluid replacement. In some cases, albumin associated with furosemide may offer benefit in the net balance.<a class="elsevierStyleCrossRefs" href="#bib35">35,36</a>Hemodynamic goals:<ul class="elsevierStyleList" id="celist60"><li class="elsevierStyleListItem" id="celistitem300">- Mean arterial pressure > 65 mmHg</li><li class="elsevierStyleListItem" id="celistitem310">- SVO2 > 70%</li><li class="elsevierStyleListItem" id="celistitem320">- Lactate < 2 mmol/L</li><li class="elsevierStyleListItem" id="celistitem330">- Diuresis higher than 1ml/Kg/h</li></ul>For optimal tissue perfusion and to obtain adequate arterial pressure, it is often necessary to use vasopressors and inotropics. We suggest norepinephrine as the first-line vasopressor and dobutamine as the inotropic. Vasopressin should be reserved for refractory shock.<a class="elsevierStyleCrossRef" href="#bib37">37</a>5.2.3 Renal support: acute renal failure has been observed in patients with S-OIV infection, especially in cases presenting shock.<a class="elsevierStyleCrossRef" href="#bib22">22</a> The etiology of acute renal failure is usually acute tubular necrosis, and in such cases renal replacement therapy may be needed.5.2.4 Corticosteroids: controversy exists as to whether we should use high-dose corticosteroids in ARDS due to S-OIV infection.<a class="elsevierStyleCrossRef" href="#bib38">38</a> The positive effect would be a reduction of the inflammatory lung injury, potentially resulting in a better PO2/FIO2 ratio and less intubation, as in ARDS of other etiologies.<a class="elsevierStyleCrossRef" href="#bib39">39</a> The adverse events in influenza virus-infected patients would be higher rates of opportunistic infection and, possibly, prolonged viral replication. We do not have pathology data for H1N1 infection to guide the choice of therapy. So, we recommend the use of methylprednisolone (2 mg/Kg per day) just in cases of ARDS that do not response to initial measures.Low doses of corticosteroids (hydrocortisone 50 mg IV four times per day) may be considered for patients in septic shock who require vasopressors and have suspected adrenal insufficiency.5.2.5 Antibiotics: antibiotic chemoprophylaxis should not be used. When pneumonia is present, treatment with antibiotics should follow the recommendations from published guidelines. However, seasonal influenza and past influenza pandemics have been associated with an increased risk of secondary Staphylococcus aureus infections, which may be severe, progress rapidly, have necrotizing effects, and, in some areas, may be caused by methicillin-resistant strains.<a class="elsevierStyleCrossRef" href="#bib40">40</a> The results of microbiological studies, wherever possible, should be used to guide antibiotic usage for suspected bacterial coinfection in patients infected with the new influenza A (H1N1) virus. Several patients worldwide have developed community pneumoniae due to Streptococcus pneumoniae and Haemophilus influenza and ventilator-associated pneumonia or hospital-acquired pneumonia caused by typical nosocomial pathogens.<a class="elsevierStyleCrossRef" href="#bib41">41</a>5.2.6 Glycemic control: tight glucose control (< 140 mg/dL) must be achieved in critically ill patients, according to the local protocol. This measure is associated with a decrease of morbidity and mortality in critical patients.<a class="elsevierStyleCrossRef" href="#bib42">42</a>5.2.7 Thromboembolic prophylaxis: patients infected with S-OIV should receive mechanical thromboprophylaxis and pharmacological if possible because, as critically ill patients with co-morbidities, they present a high risk for thromboembolic events. In a series of cases from Michigan, of 10 patients with S-OIV infection, five had a pulmonary embolism, although the higher incidence of thrombosis could be explained because seven were extremely obese (body mass index > 40).<a class="elsevierStyleCrossRef" href="#bib43">43</a>6. DIAGNOSISLaboratory confirmation of the novel influenza A (H1N1) virus, especially at the beginning of a new community outbreak, or for unusual cases, has important implications for case management, consideration of antiviral treatment options, and avoidance of the inappropriate use of antibiotics.<a class="elsevierStyleCrossRef" href="#bib44">44</a>Reverse transcriptase-polymerase chain reaction (RT-PCR) will provide the most timely and sensitive evidence of infection with the novel influenza A (H1N1) virus.<a class="elsevierStyleCrossRefs" href="#bib44">44,45</a> Real-time RT-PCR is available in reference centers around the world.<a class="elsevierStyleCrossRef" href="#bib46">46</a> Samples for laboratory tests should be obtained from the deep nasal passages (nasal swab), nasopharynx (nasopharyngeal swab), or the bronchial aspirate if available.<a class="elsevierStyleCrossRef" href="#bib47">47</a> Upper respiratory tract sampling using a combination of nasal or nasopharyngeal and a throat swab is advised and may facilitate virus detection. It is not yet known which clinical specimen provides the best diagnostic yield for this specific infection.<a class="elsevierStyleCrossRef" href="#bib48">48</a> Specimen collection should be carried out with precautions since the procedure may expose the collector to respiratory secretions from infected patients.The real-time test through polymerase chain reaction, includes the use of specific primers and probes to diagnose S-OIV infection.<a class="elsevierStyleCrossRef" href="#bib46">46</a> The set of influenza primers and probes was created to detect:<ul class="elsevierStyleList" id="celist70"><li class="elsevierStyleListItem" id="celistitem340">a)Seasonal influenza A virus</li><li class="elsevierStyleListItem" id="celistitem350">b)Swine-origin influenza A virus</li><li class="elsevierStyleListItem" id="celistitem360">cNovel virus influenza A (H1N1)</li></ul>Currently, the data show that this method has a sensitivity of 99.3% and a specificity of 92.3% for the diagnosis of infection due to novel virus influenza A (H1N1).<a class="elsevierStyleCrossRef" href="#bib46">46</a> We recommend the following types of cases to be submitted for the test:<ul class="elsevierStyleList" id="celist80"><li class="elsevierStyleListItem" id="celistitem370">a)patients who require hospitalization</li><li class="elsevierStyleListItem" id="celistitem380">b)patients with risk factors for severe forms of disease</li><li class="elsevierStyleListItem" id="celistitem390">c)patients in an individualized protocol – according to the clinical judgment</li></ul>No validated rapid bedside diagnostic test is presently available to detect novel influenza A (H1N1) virus infection. As part of the HC “bundles” for control of novel H1N1 infection, a real-time RT-PCR is available for patients and workers who fill criteria to be tested.7. TREATMENT AND PROPHYLAXISThe novel influenza A (H1N1) virus is currently susceptible to the antiviral medications known as neuraminidase inhibitors (NAIs), specifically oseltamivir and zanamivir.<a class="elsevierStyleCrossRefs" href="#bib49">49,50</a> The virus is resistant to the adamantane medications amantadine or rimantadine.<a class="elsevierStyleCrossRef" href="#bib49">49</a> Clinical efficacy data on antiviral treatment are not yet available. Based on its in vitro susceptibility patterns and the clinical experiences derived from seasonal and avian influenza infection, early administration of NAIs might reduce the severity and duration of illness caused by the novel H1N1 virus infection and might also help to prevent progression to severe disease and death.<a class="elsevierStyleCrossRef" href="#bib51">51</a> Only sporadic cases of oseltamivir-resistant 2009 influenza A (H1N1) viruses have been detected worldwide, including nine cases in the United States.<a class="elsevierStyleCrossRef" href="#bib52">52</a> Eight of nine patients had a documented exposure to oseltamivir through either treatment or prophylaxis.<a class="elsevierStyleCrossRef" href="#bib52">52</a>Clinical judgment is an important factor in the treatment decision. People with suspected novel H1N1 influenza who present with an uncomplicated febrile illness typically do not require treatment unless they are at higher risk for influenza complications, and in areas with limited antiviral availability, local public health authorities might provide guidance about prioritizing treatment within groups at higher risk.<a class="elsevierStyleCrossRef" href="#bib53">53</a>Antiviral therapy may be beneficial, especially for the following groups:<a class="elsevierStyleCrossRef" href="#bib54">54</a><ul class="elsevierStyleList" id="celist90"><li class="elsevierStyleListItem" id="celistitem400">1.All hospitalized patients with confirmed, probable, or suspected novel influenza (H1N1).</li><li class="elsevierStyleListItem" id="celistitem410">2.Patients who are at a higher risk for complications (listed above).</li></ul>If used, antiviral treatment should ideally be initiated early, as soon as possible, but it may also be used at any stage of the active disease when ongoing viral replication is anticipated or documented. Evidence for the benefits of antiviral treatment in studies of seasonal influenza is highest when treatment is started within 48 hours of the onset of illness.<a class="elsevierStyleCrossRef" href="#bib55">55</a> However, studies investigating oseltamivir treatment of hospitalized patients have indicated a benefit, including reductions of mortality or duration of hospital stay, even for patients whose treatment was initiated after 48 hours.<a class="elsevierStyleCrossRef" href="#bib56">56</a>There are important pharmacological differences to consider when choosing NAIs for treatment. Oseltamivir is administered orally and provides a higher systemic level.<a class="elsevierStyleCrossRef" href="#bib57">57</a> Zanamivir is delivered by oral inhalation, with low systemic absorption.<a class="elsevierStyleCrossRef" href="#bib57">57</a> Oseltamivir is the recommended treatment for lower respiratory tract complications.<a class="elsevierStyleCrossRef" href="#bib57">57</a> The recommended treatment duration is five days. In Brazil, oseltamivir is used for the treatment and prophylaxis of S-OIV infection (<a class="elsevierStyleCrossRef" href="#t1-cln_64p1015">Tables 1</a>, <a class="elsevierStyleCrossRefs" href="#t2-cln_64p1015">2 and 3</a>).<elsevierMultimedia ident="t1-cln_64p1015"></elsevierMultimedia><elsevierMultimedia ident="t3-cln_64p1015"></elsevierMultimedia><elsevierMultimedia ident="t2-cln_64p1015"></elsevierMultimedia>Rare neuropsychiatric symptoms, such as confusion or abnormal behavior, have occurred after beginning treatment for seasonal influenza with oseltamivir, particularly in children, but the contribution of oseltamivir to these events remains unknown.<a class="elsevierStyleCrossRef" href="#bib58">58</a>Post-exposure antiviral chemoprophylaxis with either oseltamivir or zanamivir for 10 days can be considered for the following situations:<a class="elsevierStyleCrossRef" href="#bib59">59</a><ul class="elsevierStyleList" id="celist100"><li class="elsevierStyleListItem" id="celistitem420">1.Close contact of cases (confirmed, probable, or suspected) who are at a high risk for influenza complications</li><li class="elsevierStyleListItem" id="celistitem430">2.Health care personnel, public health workers, or first responders who have had a recognized, unprotected close contact exposure to a person with novel (H1N1) influenza virus infection during the patient’s infectious period.</li></ul>In patients presenting renal failure, with a creatinine clearance between 10 and 30 ml/min/m2, a 50% dosage reduction of oseltamivir is recommended.<a class="elsevierStyleCrossRef" href="#bib60">60</a> There are no data available on the ideal dosage during renal replacement therapy. Patients with hepatic failure do not require dosage correction.<a class="elsevierStyleCrossRef" href="#bib60">60</a>Zanamivir is indicated for the treatment of influenza in adults and children (>5 years).<a class="elsevierStyleCrossRef" href="#bib57">57</a> The recommended dose for treatment of adults and children older than 5 years of age is two inhalations (2 × 5mg) twice daily for 5 days. Inhaled zanamivir has been temporally associated with bronchospasm, and patients with preexisting airway disease appear to be at an increased risk for this severe adverse reaction.<a class="elsevierStyleCrossRef" href="#bib57">57</a>Available products in Brazil:<ul class="elsevierStyleList" id="celist110"><li class="elsevierStyleListItem" id="celistitem440">a)Tamiflu® Roche – 75-mg capsule and 52-ml oral suspension (12 mg/ml)</li><li class="elsevierStyleListItem" id="celistitem450">b)Oseltamivir Farmanguinhos – 75-mg capsule</li><li class="elsevierStyleListItem" id="celistitem460">c)Oseltamivir HC – 50-ml oral suspension (15 mg/ml)</li></ul>8. PREVENTIONUntil now, no vaccine has been commercially available to protect against novel H1N1 virus, although there are everyday actions known to prevent the spread of infection, such as:<a class="elsevierStyleCrossRef" href="#bib61">61</a><ul class="elsevierStyleList" id="celist120"><li class="elsevierStyleListItem" id="celistitem470">•Wash your hands often with soap and water. Alcohol-based hand cleaners are also effective.</li><li class="elsevierStyleListItem" id="celistitem480">•Try to avoid close contact with sick people.</li><li class="elsevierStyleListItem" id="celistitem490">•Cover your nose and mouth with a tissue when you cough or sneeze.</li><li class="elsevierStyleListItem" id="celistitem500">•Stay home if you are sick for 7 days after your symptoms begin or until you have been symptom-free for 24 hours.</li><li class="elsevierStyleListItem" id="celistitem510">•Follow public health advice regarding school closures, avoid crowds.</li></ul>9. CARE OF PATIENTS WITH CONFIRMED, SUSPECTED, OR PROBABLE INFECTION WITH THE NOVEL VIRUS INFLUENZA A (H1/N1)Health care professionals must use the following personal protective equipment<a class="elsevierStyleCrossRef" href="#bib62">62</a>:<ul class="elsevierStyleList" id="celist130"><li class="elsevierStyleListItem" id="celistitem520">a)A surgical mask when the professional is working at a distance of less than1 meter from the patients, in procedures without aerosol production.</li><li class="elsevierStyleListItem" id="celistitem530">b)Special clothes to avoid contact with blood and fluids.</li><li class="elsevierStyleListItem" id="celistitem540">c)A N95 mask, protective glasses, and gloves in procedures with aerosol production, such as intubation, secretion manipulation, and autopsies.</li></ul>10. HC “BUNDLES” FOR NOVEL INFLUENZA A (H1N1) INFECTIONAs already mentioned, as a reference center for H1N1 infection, the Hospital das Clínicas da Universidade de São Paulo created the “Cabinet Crisis” with the objectives of implementing “bundles” for control of S-OIV infection, a group of interventions to obtain better outcomes in the management of this disease. We adopted some measures to obtain continuous and everyday information on the H1N1 infection, to implement actions to control the pandemics and to evaluate the impact of these interventions such as:<ul class="elsevierStyleList" id="celist140"><li class="elsevierStyleListItem" id="celistitem550">1.Periodical meetings among healthcare professionals from all institutions – directors, professors, epidemiologists, infectologists, intensive care physicians – to discuss new data and information about the disease</li><li class="elsevierStyleListItem" id="celistitem560">2.Continuous local Epidemiologic Surveillance to collect and analyze the data to assess the impact of the virus and determine the groups at an increased risk of complications.</li><li class="elsevierStyleListItem" id="celistitem570">3.Information for all professionals and patients about the infection, symptoms, diagnosis, and prevention.</li><li class="elsevierStyleListItem" id="celistitem580">4.Availability of a real time RT-PCR for novel influenza A (H1N1) virus in admitted patients.</li><li class="elsevierStyleListItem" id="celistitem590">5.Reduction of daily visits of families to the hospital.</li><li class="elsevierStyleListItem" id="celistitem600">6.Implementation of hygienic measures: alcohol-based hand cleaner, gloves, masks.</li><li class="elsevierStyleListItem" id="celistitem610">7.Internet published recommendations on the management of infection (<a href="http://www.hcnet.usp.br">www.hcnet.usp.br</a>)</li><li class="elsevierStyleListItem" id="celistitem620">8.Specific units for the care of patients with suspected or confirmed S-OIV infection including emergency room attending, regular ward and specialized intensive care units.</li><li class="elsevierStyleListItem" id="celistitem630">9.Guidance for the staff and coworkers to limit contact with other people when symptoms are present.</li><li class="elsevierStyleListItem" id="celistitem640">10.Risk groups specialized protocols of care: pregnant women, children, immunocompromised patients, and chronic diseases.</li><li class="elsevierStyleListItem" id="celistitem650">11.Immediate availability of antiviral therapy.</li></ul>In the last weeks, we could observe a significant reduction in the incidence and mortality of novel influenza A (H1N1) infection in São Paulo and in Hospital das Clínicas. We suppose that an association of factors contribute to these numbers including a global actions plan, the continuous epidemiologic monitoring and the acquired expertise to diagnosis and adequate treatment of patients. We wish to maintain all the adopted measures in Hospital das Clínicas with the ongoing objective of obtain better outcomes in the management of novel influenza A (H1N1) infection. With the accumulating experience and groups of study, we hope to contribute continuously with information regarding epidemiology, pathogenesis and clinical aspects of this pandemics.11. CONCLUSIONS AND PERSPECTIVESThe 2009 pandemic novel influenza A (H1N1) infection continues to spread globally and displays the complexity of preexisting viruses, which become highly transmissible through genetic mutations and reassortments. In less than 200 days of known disease in humans, we learned that the replication competence and virulence of the novel H1N1 virus enable it to cause severe clinical presentations and death. As a consequence of this outbreak, the world learned the value of nonpharmacologic interventions, which can save many lives. A vaccine is expected as a potential control measure for the pandemic.<a class="elsevierStyleCrossRef" href="#bib63">63</a> In the Hospital das Clínicas da Universidade de São Paulo, a “Cabinet Crisis” was created to implement a group of interventions to obtain better outcomes in the management of H1N1 infection.In our opinion, to control this pandemic, global actions are required without a geographic barrier. More studies are needed in zoonotic virology to allow a better understanding concerning the pathogenesis and epidemiologic aspects of the new viruses to prevent emergent diseases." "textoCompletoSecciones" => array:1 [ "secciones" => array:14 [ 0 => array:2 [ "identificador" => "xpalclavsec1584966" "titulo" => "KEYWORDS:" ] 1 => array:2 [ "identificador" => "cesec10" "titulo" => "1. INTRODUCTION" ] 2 => array:2 [ "identificador" => "cesec20" "titulo" => "2. HISTORICAL ASPECTS" ] 3 => array:2 [ "identificador" => "cesec30" "titulo" => "3. EPIDEMIOLOGY" ] 4 => array:2 [ "identificador" => "cesec40" "titulo" => "4. PATHOGENESIS" ] 5 => array:3 [ "identificador" => "cesec50" "titulo" => "5. CLINICAL FEATURES" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "cesec60" "titulo" => "5.1 Hospital admission" ] 1 => array:2 [ "identificador" => "cesec70" "titulo" => "5.2 Intensive care" ] ] ] 6 => array:2 [ "identificador" => "cesec80" "titulo" => "6. DIAGNOSIS" ] 7 => array:2 [ "identificador" => "cesec90" "titulo" => "7. TREATMENT AND PROPHYLAXIS" ] 8 => array:2 [ "identificador" => "cesec100" "titulo" => "8. PREVENTION" ] 9 => array:2 [ "identificador" => "cesec110" "titulo" => "9. CARE OF PATIENTS WITH CONFIRMED, SUSPECTED, OR PROBABLE INFECTION WITH THE NOVEL VIRUS INFLUENZA A (H1/N1)" ] 10 => array:2 [ "identificador" => "cesec120" "titulo" => "10. HC “BUNDLES” FOR NOVEL INFLUENZA A (H1N1) INFECTION" ] 11 => array:2 [ "identificador" => "cesec130" "titulo" => "11. CONCLUSIONS AND PERSPECTIVES" ] 12 => array:2 [ "identificador" => "xack640431" "titulo" => "ACKNOWLEDGEMENTS" ] 13 => array:1 [ "titulo" => "REFERENCES" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2009-09-22" "fechaAceptado" => "2009-09-29" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "KEYWORDS:" "identificador" => "xpalclavsec1584966" "palabras" => array:4 [ 0 => "Review" 1 => "Hospital das Clínicas" 2 => "Pandemic" 3 => "Swine Origin Infection Virus" ] ] ] ] "tieneResumen" => true "resumen" => array:1 [ "en" => array:1 [ "resumen" => "The pandemic novel influenza A (H1N1) infection was considered widespread in Brazil on July, 2009. Since then, 9.249 cases were confirmed in Brazil, most of them concentrated in São Paulo. The Hospital das Clínicas of the University of São Paulo is a reference center for H1N1 cases in São Paulo. The purpose of this review is to analyze the evidence concerning diagnosis, prevention, and treatment of novel influenza A (H1N1) infection. In addition, we propose guidelines for the management of this pandemic emphasizing Hospital das Clínicas “bundles” for the control of the pandemic novel influenza A (H1N1)." ] ] "multimedia" => array:5 [ 0 => array:7 [ "identificador" => "f1-cln_64p1015" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 948 "Ancho" => 961 "Tamanyo" => 54041 ] ] "descripcion" => array:1 [ "en" => "Spectrum of novel influenza A (H1N1) infection" ] ] 1 => array:7 [ "identificador" => "f2-cln_64p1015" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 824 "Ancho" => 993 "Tamanyo" => 108466 ] ] "descripcion" => array:1 [ "en" => "Risk groups for S-OIV infection" ] ] 2 => array:7 [ "identificador" => "t1-cln_64p1015" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Treatment Oseltamivir \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Chemoprophylaxis Oseltamivir \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Adults \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">75-mg capsule twice per day for 5 days \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">75-mg capsule once per day for 10 days \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Children ≥ 12 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">15 kg or less \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">60 mg per day divided into 2 doses \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">30 mg once per day \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">16–23 kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">90 mg per day divided into 2 doses \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">45 mg once per day \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">24–40 kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">120 mg per day divided into 2 doses \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">60 mg once per day \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">>40 kg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">150 mg per day divided into 2 doses \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">75 mg once per day \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Recommended antiviral treatment and prophylaxis for novel influenza A (H1N1) infection" ] ] 3 => array:7 [ "identificador" => "t2-cln_64p1015" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Age \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Recommended treatment for 5 days \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><3 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">12 mg twice daily \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3–5 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">20 mg twice daily \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">6–11 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">25 mg twice daily \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Recommended antiviral treatment for children younger than 1 year using oseltamivir" ] ] 4 => array:7 [ "identificador" => "t3-cln_64p1015" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Age \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Recommended prophylaxis for 10 days \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><3 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Not recommended unless the situation is judged as critical \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3–5 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">20 mg once daily \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">6–11 months \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" style="border-bottom: 2px solid black">25 mg once daily \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Recommended antiviral chemoprophylaxis for children younger than 1 year using oseltamivir" ] ] ] "bibliografia" => array:2 [ "titulo" => "REFERENCES" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec10" "bibliografiaReferencia" => array:63 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:1 [ "titulo" => "Update: swine influenza A (H1N1) infections–California and Texas, April 2009" ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "MMWR Morb Mortal Wkly Rep" "fecha" => "2009" "volumen" => "58" "paginaInicial" => "435" "paginaFinal" => "437" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19407739" "web" => "Medline" ] ] ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib2" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:1 [ "titulo" => "Update: novel influenza A (H1N1) virus infection - Mexico, March–May, 2009" ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "MMWR Morb Mortal Wkly Rep" "fecha" => "2009" "volumen" => "58" "paginaInicial" => "585" "paginaFinal" => "589" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19498336" "web" => "Medline" ] ] ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib3" "etiqueta" => "3" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:1 [ "titulo" => "Swine influenza A (H1N1) 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Ludhmila Abrahao HajjarI, Denise SchoutII, Filomena Regina Barbosa Gomes GalasI, David Everson UipIII, Anna Sara Shafferman LevinIV, Helio Hehl Caiaffa FilhoV, Pedro Takanori SakaneVI, Carlos Alberto SuslikVII, Jose Manoel de Camargo TeixeiraVIII, Eloisa BonfaIX, Antonio Alci BaroneIV, Milton de Arruda MartinsIX, Marcos BoulosX, Jose Otavio Costa Auler JrXI

I Department of Anesthesiology, InCor-Heart Institute and Instituto do Câncer do Estado de São Paulo - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

II Department of Preventive Medicine, Epidemiology Service - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

III Hospital Emilio Ribas - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

IV Department of Infectious Diseases - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

V Department of Pathology - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

VI Instituto da Criança - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

VII Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

VIII Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

IX Department of Internal Medicine - Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

X Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil

XI Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil., Tel.: 55 11 3069.6431

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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle20">1&#46; INTRODUCTION</span><p id="para10" class="elsevierStylePara elsevierViewall">In April 2009&#44; the first two cases of human infection with a novel influenza A &#40;H1N1&#41; virus were reported in the United States&#46;<a class="elsevierStyleCrossRef" href="#bib1">1</a> During the same period&#44; an outbreak of respiratory infection was reported in Mexico&#46;<a class="elsevierStyleCrossRef" href="#bib2">2</a> The virus was found to be an H1N1 virus that was antigenically and genetically unrelated to human seasonal influenza viruses and genetically related to viruses known to circulate in swine&#46;<a class="elsevierStyleCrossRef" href="#bib3">3</a> In the ensuing weeks&#44; the swine-origin influenza virus &#40;S-OIV&#41; H1N1 spread worldwide&#44; constituting a pandemic&#44; as defined by the World Health Organization&#46;<a class="elsevierStyleCrossRef" href="#bib4">4</a> The novel H1N1 virus has distinct molecular properties of human&#44; avian&#44; and swine influenza&#44; resulting from antigenic drift&#44; which is the main cause of the seasonal epidemic of swine flu&#46;<a class="elsevierStyleCrossRef" href="#bib4">4</a></p><p id="para20" class="elsevierStylePara elsevierViewall">As of September 13&#44; 2009&#44; the S-OIV caused over than 296&#46;471 virologically confirmed human cases and at least 3&#46;486 deaths in countries worldwide&#46;<a class="elsevierStyleCrossRef" href="#bib5">5</a> Almost five months after the description of the first cases&#44; the pandemic S-OIV infection continues to spread globally&#44; presents a high rate of transmission among humans&#44; and can lead to serious complications and mortality&#46; The purpose of this guideline is to review the evidence concerning diagnosis&#44; prevention&#44; and treatment of S-OIV infection&#46; In addition&#44; we emphasize the Hospital das Cl&#237;nicas&#8217; plan for the management of the pandemic novel influenza A &#40;H1N1&#41;&#46; This report is an initiative from the &#8220;Cabinet Crisis&#8221; - a group of healthcare professionals at the Hospital das Cl&#237;nicas da Faculdade de Medicina da Unversidade de S&#227;o Paulo who continuously evaluate the &#8220;bundles&#8221; for control of S-OIV infection&#44; meaning the groups of interventions and advertisements&#44; to obtain better outcomes in the management of this disease&#46;</p></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle30">2&#46; HISTORICAL ASPECTS</span><p id="para30" class="elsevierStylePara elsevierViewall">An estimated 58&#37; of the 1407 human pathogens are zoonotic&#44; which means that they normally occur in animals but can also infect humans&#46;<a class="elsevierStyleCrossRef" href="#bib6">6</a> The ability of a microorganism to cross the species barrier in association with a high transmissibility rate between humans may result in epidemics&#46; The novel influenza A &#40;H1N1&#41; virus&#44; which is responsible for the current pandemic&#44; is derived from two unrelated swine viruses&#44; one of which is a derivative of the 1918 human virus&#46;<a class="elsevierStyleCrossRef" href="#bib3">3</a> The notorious 1918 pandemic of influenza A &#40;H1N1&#41;&#44; the Spanish flu&#44; was derived from an avian source and caused 50 million deaths&#46;<a class="elsevierStyleCrossRef" href="#bib6">6</a> Some authors proposed that the virus resided in an avian reservoir and affected humans either directly upon exposure to birds or through an intermediate host&#46;<a class="elsevierStyleCrossRef" href="#bib7">7</a> As the 1918 influenza virus can replicate and cause disease in swine&#44; scientists believe that it has continued to circulate in swine and this fact would facilitate the genetic reassortment between different influenza virus strains&#46;<a class="elsevierStyleCrossRef" href="#bib8">8</a></p><p id="para40" class="elsevierStylePara elsevierViewall">A practical way to think about influenza A events over the past 91 years is to recognize that we are living in a pandemic era that began in 1918&#46; The novel H1N1 virus associated with the ongoing 2009 pandemic is a fourth-generation descendant of the 1918 virus&#46; The complex evolutionary history of this virus combines unique structural properties and genetic mixing among human viruses and avian and swine-adapted influenza viruses&#46;<a class="elsevierStyleCrossRef" href="#bib9">9</a> Two features of the influenza virus explain its ability to cause widespread disease&#46; One is the high error rate during genomic replication&#46;<a class="elsevierStyleCrossRefs" href="#bib9">9&#44;10</a> The other is the segmented influenza virus genome&#44; which allows reassortment between different viral strains&#46;<a class="elsevierStyleCrossRefs" href="#bib9">9&#44;10</a> Because of this continual change phenomenon&#44; a seemingly endless variety of new viruses with potentially new properties are continuously being engineered&#46; In contrast&#44; this new virus is not only infecting humans and causing some disease&#44; but it is also being transmitted efficiently from human to human&#46;</p></span><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle40">3&#46; EPIDEMIOLOGY</span><p id="para50" class="elsevierStylePara elsevierViewall">The pandemic novel influenza A &#40;H1N1&#41; infection was considered as widespread in Brazil on July 16&#46;<a class="elsevierStyleCrossRef" href="#bib11">11</a> Since then&#44; the Ministry of Health in Brazil&#44; as suggested by the World Health Organization&#44; has maintained a continuous epidemiologic vigilance of cases of acute respiratory syndrome &#40;ARS&#41;&#46; The strategy of vigilance considers any persons with flu syndrome as potential cases of influenza A &#40;H1N1&#41; and designates these individuals as presenting acute respiratory syndrome patients with cough&#44; dyspnea&#44; and fever&#46;</p><p id="para60" class="elsevierStylePara elsevierViewall">Until now&#44; 46&#46;810 cases of ARS were reported notified in Brazil&#46;<a class="elsevierStyleCrossRef" href="#bib12">12</a> Of these&#44; 9&#46;249 &#40;20&#37;&#41; patients presented infection with S-OIV or influenza A &#40;H1N1&#41;&#46; Seasonal influenza A infection was confirmed in 1&#46;152 &#40;2&#46;5&#37;&#41; patients&#46;<a class="elsevierStyleCrossRef" href="#bib11">11</a></p><p id="para70" class="elsevierStylePara elsevierViewall">The observed age distribution is unusual and differs from seasonal influenza&#44; being skewed towards younger age groups&#46; There is a marked underrepresentation of infections in persons over 65 years of age&#44; who make up only 2&#37; of the reported cases&#46; In Brazil&#44; among the reported cases&#44; the affected individuals tend to be young&#44; with a median age of 26 years&#46; Most patients are 15&#8211;49 years of age&#46; Considering the gender distribution&#44; 57&#46;5&#37; of the confirmed cases of novel virus influenza A &#40;H1N1&#41; occur in women&#46;<a class="elsevierStyleCrossRefs" href="#bib11">11&#44;12</a>&#46;</p><p id="para80" class="elsevierStylePara elsevierViewall">Among these 9&#46;249 confirmed cases in Brazil&#44; 899 deaths are reported with mortality rate of 0&#44;47&#47;per 100&#46;000 inhabitants&#46;<a class="elsevierStyleCrossRef" href="#bib11">11</a> All Brazilian states have reported cases of S-OIV infection&#44; with the exception of Sergipe&#46; Most cases and deaths are concentrated in S&#227;o Paulo&#44; but major mortality rate was observed in Paran&#225; &#40;2&#44;08&#47;100&#46;000 inhabitants&#41;&#46;</p><p id="para90" class="elsevierStylePara elsevierViewall">As of September 12&#44; 2009&#44; 13&#46;069 cases of ARS were registered in S&#227;o Paulo and 3&#46;733 are due to novel influenza A &#40;H1N1&#41; infection&#46;<a class="elsevierStyleCrossRef" href="#bib11">11</a> S&#227;o Paulo state registers 40&#46;3&#37; &#40;3&#46;733 of 9&#46;249&#41; of all confirmed cases from Brazil&#44; the majority identified in the city&#46;</p><p id="para100" class="elsevierStylePara elsevierViewall">The Hospital das Cl&#237;nicas of Faculdade de Medicina da Universidade de S&#227;o Paulo &#40;HC-FMUSP&#41; is the largest tertiary health care hospital in Brazil&#44; with 6 medical institutes and other associated hospitals&#44; and is a reference center for H1N1 cases in S&#227;o Paulo&#46; Three months after the report of the first case of novel H1N1 infection in Brazil&#44; the Hospital das Cl&#237;nicas has accumulated experience with about 1500 cases registered and 472 confirmed with a low lethality rate &#40;7&#46;14&#37;&#41;&#46;</p><p id="para110" class="elsevierStylePara elsevierViewall">The management of this disease requires specific knowledge and the expertise to provide an adequate diagnosis and treatment of patients&#46; With the goal of obtaining better outcomes in diseased patients&#44; the Hospital Council established a &#8220;Cabinet Crisis&#8221; to continuously obtain information from Health Organs&#44; Epidemiological Surveillance Systems and from literature regarding epidemiological data and clinical presentations of S-OIV infection and to provide an adequate structure for the care of patients&#46;</p></span><span id="cesec40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle50">4&#46; PATHOGENESIS</span><p id="para120" class="elsevierStylePara elsevierViewall">Influenza A&#44; B&#44; and C are RNA viruses of the Ortomyxoviridae family and cause both pandemic and seasonal disease in humans&#46;<a class="elsevierStyleCrossRef" href="#bib14">14</a> Influenza A viruses are enveloped&#44; single-stranded RNA viruses with a segmented genome&#46; They are categorized into subtypes on the basis of the antigenic properties of the hemagglutinin &#40;HA&#41; and neuraminidase &#40;NA&#41; glycoproteins on the surface of the virus&#46;<a class="elsevierStyleCrossRef" href="#bib14">14</a> The HA glycoprotein mediates attachment and entry of the virus on the cell surface and is the main target for immunity by neutralizing antibodies&#46; The NA glycoprotein allows the spread of the virus by cleaving the glycosidic linkages to sialic acid on host cells and on the surface of the virus&#46;<a class="elsevierStyleCrossRef" href="#bib15">15</a> Influenza A viruses are characterized according to their pathogenicity&#44; which results in severe disease and death in different species&#46; This S-OIV results from frequent antigenic changes &#40;i&#46;e&#46;&#44; antigenic drift&#41; due to point mutations and recombination events that occur during viral replication&#46;<a class="elsevierStyleCrossRef" href="#bib15">15</a> The novel influenza A &#40;H1N1&#41; virus is not a new subtype&#44; but because the large majority of humans appear to have no pre-existing antibodies to this virus&#44; a substantial potential for widespread infection exists&#46;<a class="elsevierStyleCrossRefs" href="#bib14">14&#44;15</a></p><p id="para130" class="elsevierStylePara elsevierViewall">The novel influenza A &#40;H1N1&#41; virus has distinct properties that enable it to cause disease in both swine and humans and confers high rates of transmissibility among humans&#46; The pathogenesis of human infection due to S-OIV is poorly understood&#44; but appears to involve two phenomena&#58; a&#41; direct cytotoxic viral damage and b&#41; a cytokine storm&#44; resulting from the inflammatory response to viral infection&#46;<a class="elsevierStyleCrossRefs" href="#bib16">16&#44;17</a> The interaction between host and virus may result in different forms of disease&#44; depending on the viral load and the inflammatory response&#46; In patients with co-morbidities&#44; host mechanisms of defense may be defective and such patients can present an altered innate immune response&#46; In the most severe cases&#44; co-infection with other viruses and bacteria &#40;<span class="elsevierStyleItalic">Streptococcus pneumoniae&#44; Haemophilus influenza&#44;</span> and <span class="elsevierStyleItalic">Staphylococcus aureus</span>&#41; can occur contributing to the high rates of mortality&#46;<a class="elsevierStyleCrossRef" href="#bib18">18</a></p><p id="para140" class="elsevierStylePara elsevierViewall">There is no evidence to date suggesting that the virus disseminates any differently from other human influenza viruses&#44; i&#46;e&#46;&#44; by droplets from coughing and sneezing and direct and indirect contact with respiratory secretions from infected persons&#46;<a class="elsevierStyleCrossRef" href="#bib19">19</a> An individual may sometimes become infected by touching something contaminated with flu viruses and then touching his or her mouth or nose&#46;<a class="elsevierStyleCrossRef" href="#bib19">19</a> There is no evidence to suggest unusual transmission routes for influenza&#44; and there is no reason to suggest transmission via food&#46; Patients may be contagious from one day before developing symptoms to up to 7 days after they get sick&#46;<a class="elsevierStyleCrossRefs" href="#bib19">19&#44;20</a> Children and persons with deficient immunity might be contagious for longer periods of time&#46;<a class="elsevierStyleCrossRef" href="#bib20">20</a></p></span><span id="cesec50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle60">5&#46; CLINICAL FEATURES</span><p id="para150" class="elsevierStylePara elsevierViewall">Human infection with the novel virus influenza A &#40;H1N1&#41; is characterized by a variable clinical presentation&#46; We can describe a spectrum of disease presentations&#58; the asymptomatic form&#44; &#8220;flu-like syndrome&#8221;&#44; and the severe form with acute respiratory distress syndrome leading to death &#40;<a class="elsevierStyleCrossRef" href="#f1-cln_64p1015">Figure 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib21">21</a> The majority of patients present the &#8220;flu-like syndrome&#8221; with fever&#44; myalgia&#44; sore throat&#44; arthralgia&#44; cough&#44; headache&#44; chills&#44; and fatigue&#46;<a class="elsevierStyleCrossRefs" href="#bib22">22&#44;23</a> Fever is the most frequent symptom and usually lasts for three days&#46; Respiratory symptoms generally disappear three or four days after the fever ends&#46; Diarrhea&#44; emesis&#44; and weakness can be present in a significant number of cases&#46;<a class="elsevierStyleCrossRefs" href="#bib22">22&#44;23</a></p><elsevierMultimedia ident="f1-cln_64p1015"></elsevierMultimedia><p id="para160" class="elsevierStylePara elsevierViewall">Despite the fact that in most patients the disease has a benign evolution and a limited duration&#44; some patients may present respiratory failure&#44; rapidly developing acute respiratory distress syndrome&#46;<a class="elsevierStyleCrossRefs" href="#bib24">24&#44;25</a> Published data describe systemic disease and complications due to S-OIV infection such as&#58;<a class="elsevierStyleCrossRefs" href="#bib22">22&#44;23</a></p><p id="para170" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist10"><li class="elsevierStyleListItem" id="celistitem10"><span class="elsevierStyleLabel">a&#46;</span><p id="para180" class="elsevierStylePara elsevierViewall">Worsening of previous existing disease</p></li><li class="elsevierStyleListItem" id="celistitem20"><span class="elsevierStyleLabel">b&#46;</span><p id="para190" class="elsevierStylePara elsevierViewall">Sinusitis&#44; otitis&#44; asthma</p></li><li class="elsevierStyleListItem" id="celistitem30"><span class="elsevierStyleLabel">c&#46;</span><p id="para200" class="elsevierStylePara elsevierViewall">Pneumonia&#44; acute lung injury&#44; respiratory failure</p></li><li class="elsevierStyleListItem" id="celistitem40"><span class="elsevierStyleLabel">d&#46;</span><p id="para210" class="elsevierStylePara elsevierViewall">Pericarditis&#44; myocarditis</p></li><li class="elsevierStyleListItem" id="celistitem50"><span class="elsevierStyleLabel">e&#46;</span><p id="para220" class="elsevierStylePara elsevierViewall">Myositis&#44; rhabdomyolysis</p></li><li class="elsevierStyleListItem" id="celistitem60"><span class="elsevierStyleLabel">f&#46;</span><p id="para230" class="elsevierStylePara elsevierViewall">Acute renal failure due to acute tubular necrosis</p></li><li class="elsevierStyleListItem" id="celistitem70"><span class="elsevierStyleLabel">g&#46;</span><p id="para240" class="elsevierStylePara elsevierViewall">Encephalitis&#44; seizures</p></li><li class="elsevierStyleListItem" id="celistitem80"><span class="elsevierStyleLabel">h&#46;</span><p id="para250" class="elsevierStylePara elsevierViewall">Systemic inflammatory response syndrome</p></li><li class="elsevierStyleListItem" id="celistitem90"><span class="elsevierStyleLabel">i&#46;</span><p id="para260" class="elsevierStylePara elsevierViewall">Multiple organ failure</p></li><li class="elsevierStyleListItem" id="celistitem100"><span class="elsevierStyleLabel">j&#46;</span><p id="para270" class="elsevierStylePara elsevierViewall">Death</p></li></ul></p><p id="para280" class="elsevierStylePara elsevierViewall">The reported cases reveal that about 70&#37; of patients who die or present severe forms of the disease have underlying conditions&#46;<a class="elsevierStyleCrossRefs" href="#bib22">22&#44;23&#44;24&#44;25&#44;26&#44;27</a> Risk groups for hospitalization and severe disease due to S-OIV infection are&#58;</p><p id="para290" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist20"><li class="elsevierStyleListItem" id="celistitem110"><span class="elsevierStyleLabel">a&#46;</span><p id="para300" class="elsevierStylePara elsevierViewall">Individuals with underlying chronic diseases&#58; data show that most patients hospitalized due to the need for care present co-morbidities&#44; such as&#58; asthma&#44; chronic obstructive airways disease&#44; diabetes&#44; immunocompromise&#44; chronic cardiovascular disease&#44; chronic renal failure&#44; epilepsy&#44; obesity&#44; and cancer&#46;<a class="elsevierStyleCrossRefs" href="#bib22">22&#44;23&#44;24</a></p></li><li class="elsevierStyleListItem" id="celistitem120"><span class="elsevierStyleLabel">b&#46;</span><p id="para310" class="elsevierStylePara elsevierViewall">Pregnant women&#58; studies report that pregnant women infected with S-OIV have a four to five times greater chance of being hospitalized than healthy pregnant women and present more severe forms of the disease&#46;<a class="elsevierStyleCrossRefs" href="#bib25">25&#44;26</a></p></li><li class="elsevierStyleListItem" id="celistitem130"><span class="elsevierStyleLabel">c&#46;</span><p id="para320" class="elsevierStylePara elsevierViewall">Young children&#58; children under two years of age present high rates of hospitalization and death&#46;<a class="elsevierStyleCrossRef" href="#bib27">27</a></p></li><li class="elsevierStyleListItem" id="celistitem140"><span class="elsevierStyleLabel">d&#46;</span><p id="para330" class="elsevierStylePara elsevierViewall">Older individuals&#58; persons 65 years and older have a high likelihood of needing hospital care and exhibit a high case fatality rate&#46;<a class="elsevierStyleCrossRefs" href="#bib23">23&#44;24</a></p></li></ul></p><p id="para340" class="elsevierStylePara elsevierViewall">From these analyses we can describe a list of risk groups&#44; i&#46;e&#46;&#44; groups that experience more severe infections than the general population &#40;<a class="elsevierStyleCrossRef" href="#f2-cln_64p1015">Figure 2</a>&#41;&#46;</p><elsevierMultimedia ident="f2-cln_64p1015"></elsevierMultimedia><p id="para350" class="elsevierStylePara elsevierViewall">Pregnant women have a potential for complicated disease&#46; For that&#44; in Hospital das Cl&#237;nicas&#44; there is a specific protocol of care for this group&#44; which include hospital admission in suspected or confirmed cases with clinical complications and a careful vigilance system for mild forms of disease with home treatment&#46;</p><span id="cesec60" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle70">5&#46;1 Hospital admission</span><p id="para360" class="elsevierStylePara elsevierViewall">To date&#44; most human cases of new influenza A &#40;H1N1&#41; virus infection have exhibited an uncomplicated illness of limited duration&#46; Hospitalization or antiviral therapy is therefore not likely to be required for most patients&#46; Supportive care includes antipyretics&#44; such as dypirone or acetaminophen for fever or pain&#44; and fluid rehydration that can be provided as needed&#46;<a class="elsevierStyleCrossRef" href="#bib22">22</a></p><p id="para370" class="elsevierStylePara elsevierViewall">The specific risk factors that predict an increased risk of progressive disease are incompletely understood&#46; Clinicians and caregivers should watch for signs of possible clinical deterioration &#40;for example&#44; difficulty breathing&#44; chest pain&#44; coughing up colored sputum&#44; dyspnea&#44; altered level of consciousness&#44; and confusion&#41; and refer immediately such patients to the hospital&#46; Clinicians should also take into account any underlying co-morbidities&#44; the already described risk groups &#40;such as immunocompromising conditions&#44; pre-existing chronic lung or cardiovascular disease&#44; diabetes&#44; pregnancy&#44; and young age&#41;&#46;</p><p id="para380" class="elsevierStylePara elsevierViewall">Patients who present one or more of the following signs and symptoms must be hospitalized in an intensive care unit&#58;</p><p id="para390" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist30"><li class="elsevierStyleListItem" id="celistitem150"><span class="elsevierStyleLabel">a&#41;</span><p id="para400" class="elsevierStylePara elsevierViewall">Hemodynamic instability</p></li><li class="elsevierStyleListItem" id="celistitem160"><span class="elsevierStyleLabel">b&#41;</span><p id="para410" class="elsevierStylePara elsevierViewall">Acute respiratory failure</p></li><li class="elsevierStyleListItem" id="celistitem170"><span class="elsevierStyleLabel">c&#41;</span><p id="para420" class="elsevierStylePara elsevierViewall">Extensive lung compromise on chest X-ray</p></li><li class="elsevierStyleListItem" id="celistitem180"><span class="elsevierStyleLabel">d&#41;</span><p id="para430" class="elsevierStylePara elsevierViewall">Severe hypoxemia</p></li><li class="elsevierStyleListItem" id="celistitem190"><span class="elsevierStyleLabel">e&#41;</span><p id="para440" class="elsevierStylePara elsevierViewall">An PO2&#47;FiO2 &#60; 300&#44; characteristic of acute lung injury</p></li><li class="elsevierStyleListItem" id="celistitem200"><span class="elsevierStyleLabel">f&#41;</span><p id="para450" class="elsevierStylePara elsevierViewall">Compromise of other organs&#58; acute renal failure&#44; myositis&#44; encephalitis&#44; and other</p></li><li class="elsevierStyleListItem" id="celistitem210"><span class="elsevierStyleLabel">g&#41;</span><p id="para460" class="elsevierStylePara elsevierViewall">Organ dysfunction</p></li></ul></p></span><span id="cesec70" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle80">5&#46;2 Intensive care</span><p id="para470" class="elsevierStylePara elsevierViewall">5&#46;2&#46;1 Ventilatory support&#58; until now&#44; there has been no unique&#44; definite pattern of lung disease&#46; Patients who present serious hypoxemia may present different forms of lung damage&#46;<a class="elsevierStyleCrossRefs" href="#bib23">23&#44;24</a> Most patients present diffuse alveolar damage&#44; but localized disease&#44; bronchiolitis&#44; lobar pneumonia&#44; and pleural effusion may be present&#46; Ventilator support indications will then depend on the clinical condition of the patients&#44; evaluated through signs&#44; symptoms&#44; and laboratory analysis &#40;including arterial gas&#41;&#46;</p><p id="para480" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist40"><li class="elsevierStyleListItem" id="celistitem220"><p id="para490" class="elsevierStylePara elsevierViewall">- Non-invasive ventilation &#40;NIV&#41;&#58; despite the theoretical risk of aerosol production with this modality&#44; we recommend NIV in patients with hypoxemia due to the reduced rates of orotracheal intubation&#46; Indications for and limitations of this method in patients with S-OIV infection are the same as those for patients with respiratory failure due to other etiologies&#46;<a class="elsevierStyleCrossRef" href="#bib28">28</a> NIV should be used in patients without hemodynamic instability or consciousness alterations&#46;<a class="elsevierStyleCrossRefs" href="#bib28">28&#44;29</a> The preferred modality is the BiPAP&#44; with inspiratory pressure &#40;IPAP&#41; and expiratory pressure &#40;EPAP&#41; adjusted independently&#46; After selecting and fitting the mask&#44; the recommended initial settings are IPAP &#61; 8&#8211;12 cmH<span class="elsevierStyleInf">2</span>O and EPAP &#61; 3&#8211;5 cmH<span class="elsevierStyleInf">2</span>O&#46; The IPAP is increased gradually as tolerated&#44; with the therapeutics goals of dyspnea relief&#44; good patient-ventilator synchrony&#44; and improved gas exchange&#46; The EPAP may be increased as needed for alveolar recruitment&#46;</p></li><li class="elsevierStyleListItem" id="celistitem230"><p id="para500" class="elsevierStylePara elsevierViewall">- Invasive ventilation&#58;</p></li><li class="elsevierStyleListItem" id="celistitem240"><p id="para510" class="elsevierStylePara elsevierViewall">- Treatment of ARDS associated with new influenza A &#40;H1N1&#41; virus infection should be based on published evidence-based guidelines for sepsis-associated ARDS&#46;<a class="elsevierStyleCrossRefs" href="#bib29">29&#44;30</a> Lung-protective mechanical ventilation strategies should be used&#46; The rationale is not to cause damage of non-affected areas&#46; We recommend the following therapy&#58;</p><p id="para520" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist50"><li class="elsevierStyleListItem" id="celistitem250"><span class="elsevierStyleLabel">a&#41;</span><p id="para530" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Ventilatory mode&#58;</span> most ARDS patients are ventilated using conventional volume-cycled positive-pressure ventilators&#46; Most studies using low tidal volume for ARDS employed this mode&#46;<a class="elsevierStyleCrossRefs" href="#bib29">29&#44;30</a> However&#44; no differences in outcomes are detected if pressure-controlled ventilation is chosen&#44; since the low tidal volume strategy is reached&#46;</p></li><li class="elsevierStyleListItem" id="celistitem260"><span class="elsevierStyleLabel">b&#41;</span><p id="para540" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Oxygen&#58;</span> treatment of hypoxemia in ARDS induced by H1N1 virus is almost always initiated using 100&#37; oxygen &#40;FIO<span class="elsevierStyleInf">2</span> &#61; 1&#46;0&#41;&#44; and the concentration of O<span class="elsevierStyleInf">2</span> is reduced with the goal of maintaining a PaO<span class="elsevierStyleInf">2</span> greater than 60 mmHg &#40;arterial O<span class="elsevierStyleInf">2</span> saturation of about 90&#37;&#41;&#46; The FIO<span class="elsevierStyleInf">2</span> should be lowered to less than 0&#46;5 as soon as possible to reduce the risk of lung damage due to oxygen toxicity&#46;</p></li><li class="elsevierStyleListItem" id="celistitem270"><span class="elsevierStyleLabel">c&#41;</span><p id="para550" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Positive End-Expiratory Pressure &#40;PEEP&#41;&#58;</span> Positive end-expiratory pressure works by counteracting the tendency toward alveoli collapse during pulmonary edema&#44; low lung volume&#44; and loss of surfactant&#46;<a class="elsevierStyleCrossRef" href="#bib31">31</a> In ARDS&#44; the majority of the lung is atelectatic&#46;<a class="elsevierStyleCrossRef" href="#bib29">29</a> PEEP recruits partially collapsed areas&#44; improving gas exchange&#46;<a class="elsevierStyleCrossRef" href="#bib31">31</a> However&#44; in some cases it is associated with barotrauma&#44; pneumothorax&#44; lung injury&#44; inflammation&#44; a cardiac output decrease&#44; and shock&#46;<a class="elsevierStyleCrossRef" href="#bib32">32</a> Consequently&#44; we recommend a PEEP level between 5 and 12 cm H<span class="elsevierStyleInf">2</span>O in most patients&#44; and we can adjust the PEEP levels using a combination of the PV curve&#44; the response of arterial blood gases&#44; the hypothetical maximum and minimum PEEP values&#44; and the hemodynamic response&#46;</p></li><li class="elsevierStyleListItem" id="celistitem280"><span class="elsevierStyleLabel">d&#41;</span><p id="para560" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Low-tidal-volume strategy&#58;</span> the most important development in the management of ARDS is that mechanical ventilation with a lower tidal volume than previously used is associated with an improved clinical outcome&#46;<a class="elsevierStyleCrossRefs" href="#bib29">29&#44;30</a> This type of ventilation has been termed as the low-tidal volume or lung-protective strategy&#46; The best risk&#58;benefit ratio would be gained with a tidal volume of 6 ml&#47;Kg or less&#44; to reach a target plateau pressure of less than 30 cm H<span class="elsevierStyleInf">2</span>O&#46;<a class="elsevierStyleCrossRef" href="#bib30">30</a></p></li><li class="elsevierStyleListItem" id="celistitem290"><span class="elsevierStyleLabel">e&#41;</span><p id="para570" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Recruitment maneuvers and the prone position&#58;</span> recruitment maneuvers and the prone position must be reserved for refractory hypoxemia&#44; as in other cases of ARDS&#46;<a class="elsevierStyleCrossRefs" href="#bib33">33&#44;34</a></p></li></ul></p></li></ul></p><p id="para580" class="elsevierStylePara elsevierViewall">5&#46;2&#46;2 Hemodynamic support&#58; Patients admitted to the intensive care unit with S-OIV infection and ARDS may present shock&#46; It is of main importance to maintain hemodynamic goals in these patients to avoid organ failure&#46; Fluid management in this population should be performed carefully&#46; Current evidence indicates that a net negative balance is desirable in ARDS&#46;<a class="elsevierStyleCrossRef" href="#bib35">35</a> However&#44; in these patients&#44; hypovolemia must be avoided&#46; Therefore&#44; we recommend dynamic evaluation of the fluid status and a more conservative strategy for fluid replacement&#46; In some cases&#44; albumin associated with furosemide may offer benefit in the net balance&#46;<a class="elsevierStyleCrossRefs" href="#bib35">35&#44;36</a></p><p id="para590" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Hemodynamic goals&#58;</span></p><p id="para600" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist60"><li class="elsevierStyleListItem" id="celistitem300"><p id="para610" class="elsevierStylePara elsevierViewall">- Mean arterial pressure &#62; 65 mmHg</p></li><li class="elsevierStyleListItem" id="celistitem310"><p id="para620" class="elsevierStylePara elsevierViewall">- SVO<span class="elsevierStyleInf">2</span> &#62; 70&#37;</p></li><li class="elsevierStyleListItem" id="celistitem320"><p id="para630" class="elsevierStylePara elsevierViewall">- Lactate &#60; 2 mmol&#47;L</p></li><li class="elsevierStyleListItem" id="celistitem330"><p id="para640" class="elsevierStylePara elsevierViewall">- Diuresis higher than 1ml&#47;Kg&#47;h</p></li></ul></p><p id="para650" class="elsevierStylePara elsevierViewall">For optimal tissue perfusion and to obtain adequate arterial pressure&#44; it is often necessary to use vasopressors and inotropics&#46; We suggest norepinephrine as the first-line vasopressor and dobutamine as the inotropic&#46; Vasopressin should be reserved for refractory shock&#46;<a class="elsevierStyleCrossRef" href="#bib37">37</a></p><p id="para660" class="elsevierStylePara elsevierViewall">5&#46;2&#46;3 Renal support&#58; acute renal failure has been observed in patients with S-OIV infection&#44; especially in cases presenting shock&#46;<a class="elsevierStyleCrossRef" href="#bib22">22</a> The etiology of acute renal failure is usually acute tubular necrosis&#44; and in such cases renal replacement therapy may be needed&#46;</p><p id="para670" class="elsevierStylePara elsevierViewall">5&#46;2&#46;4 Corticosteroids&#58; controversy exists as to whether we should use high-dose corticosteroids in ARDS due to S-OIV infection&#46;<a class="elsevierStyleCrossRef" href="#bib38">38</a> The positive effect would be a reduction of the inflammatory lung injury&#44; potentially resulting in a better PO2&#47;FIO2 ratio and less intubation&#44; as in ARDS of other etiologies&#46;<a class="elsevierStyleCrossRef" href="#bib39">39</a> The adverse events in influenza virus-infected patients would be higher rates of opportunistic infection and&#44; possibly&#44; prolonged viral replication&#46; We do not have pathology data for H1N1 infection to guide the choice of therapy&#46; So&#44; we recommend the use of methylprednisolone &#40;2 mg&#47;Kg per day&#41; just in cases of ARDS that do not response to initial measures&#46;</p><p id="para680" class="elsevierStylePara elsevierViewall">Low doses of corticosteroids &#40;hydrocortisone 50 mg IV four times per day&#41; may be considered for patients in septic shock who require vasopressors and have suspected adrenal insufficiency&#46;</p><p id="para690" class="elsevierStylePara elsevierViewall">5&#46;2&#46;5 Antibiotics&#58; antibiotic chemoprophylaxis should not be used&#46; When pneumonia is present&#44; treatment with antibiotics should follow the recommendations from published guidelines&#46; However&#44; seasonal influenza and past influenza pandemics have been associated with an increased risk of secondary <span class="elsevierStyleItalic">Staphylococcus aureus</span> infections&#44; which may be severe&#44; progress rapidly&#44; have necrotizing effects&#44; and&#44; in some areas&#44; may be caused by methicillin-resistant strains&#46;<a class="elsevierStyleCrossRef" href="#bib40">40</a> The results of microbiological studies&#44; wherever possible&#44; should be used to guide antibiotic usage for suspected bacterial coinfection in patients infected with the new influenza A &#40;H1N1&#41; virus&#46; Several patients worldwide have developed community pneumoniae due to <span class="elsevierStyleItalic">Streptococcus pneumoniae</span> and <span class="elsevierStyleItalic">Haemophilus influenza</span> and ventilator-associated pneumonia or hospital-acquired pneumonia caused by typical nosocomial pathogens&#46;<a class="elsevierStyleCrossRef" href="#bib41">41</a></p><p id="para700" class="elsevierStylePara elsevierViewall">5&#46;2&#46;6 Glycemic control&#58; tight glucose control &#40;&#60; 140 mg&#47;dL&#41; must be achieved in critically ill patients&#44; according to the local protocol&#46; This measure is associated with a decrease of morbidity and mortality in critical patients&#46;<a class="elsevierStyleCrossRef" href="#bib42">42</a></p><p id="para710" class="elsevierStylePara elsevierViewall">5&#46;2&#46;7 Thromboembolic prophylaxis&#58; patients infected with S-OIV should receive mechanical thromboprophylaxis and pharmacological if possible because&#44; as critically ill patients with co-morbidities&#44; they present a high risk for thromboembolic events&#46; In a series of cases from Michigan&#44; of 10 patients with S-OIV infection&#44; five had a pulmonary embolism&#44; although the higher incidence of thrombosis could be explained because seven were extremely obese &#40;body mass index &#62; 40&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib43">43</a></p></span></span><span id="cesec80" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle90">6&#46; DIAGNOSIS</span><p id="para720" class="elsevierStylePara elsevierViewall">Laboratory confirmation of the novel influenza A &#40;H1N1&#41; virus&#44; especially at the beginning of a new community outbreak&#44; or for unusual cases&#44; has important implications for case management&#44; consideration of antiviral treatment options&#44; and avoidance of the inappropriate use of antibiotics&#46;<a class="elsevierStyleCrossRef" href="#bib44">44</a></p><p id="para730" class="elsevierStylePara elsevierViewall">Reverse transcriptase-polymerase chain reaction &#40;RT-PCR&#41; will provide the most timely and sensitive evidence of infection with the novel influenza A &#40;H1N1&#41; virus&#46;<a class="elsevierStyleCrossRefs" href="#bib44">44&#44;45</a> Real-time RT-PCR is available in reference centers around the world&#46;<a class="elsevierStyleCrossRef" href="#bib46">46</a> Samples for laboratory tests should be obtained from the deep nasal passages &#40;nasal swab&#41;&#44; nasopharynx &#40;nasopharyngeal swab&#41;&#44; or the bronchial aspirate if available&#46;<a class="elsevierStyleCrossRef" href="#bib47">47</a> Upper respiratory tract sampling using a combination of nasal or nasopharyngeal and a throat swab is advised and may facilitate virus detection&#46; It is not yet known which clinical specimen provides the best diagnostic yield for this specific infection&#46;<a class="elsevierStyleCrossRef" href="#bib48">48</a> Specimen collection should be carried out with precautions since the procedure may expose the collector to respiratory secretions from infected patients&#46;</p><p id="para740" class="elsevierStylePara elsevierViewall">The real-time test through polymerase chain reaction&#44; includes the use of specific primers and probes to diagnose S-OIV infection&#46;<a class="elsevierStyleCrossRef" href="#bib46">46</a> The set of influenza primers and probes was created to detect&#58;</p><p id="para750" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist70"><li class="elsevierStyleListItem" id="celistitem340"><span class="elsevierStyleLabel">a&#41;</span><p id="para760" class="elsevierStylePara elsevierViewall">Seasonal influenza A virus</p></li><li class="elsevierStyleListItem" id="celistitem350"><span class="elsevierStyleLabel">b&#41;</span><p id="para770" class="elsevierStylePara elsevierViewall">Swine-origin influenza A virus</p></li><li class="elsevierStyleListItem" id="celistitem360"><span class="elsevierStyleLabel">c</span><p id="para780" class="elsevierStylePara elsevierViewall">Novel virus influenza A &#40;H1N1&#41;</p></li></ul></p><p id="para790" class="elsevierStylePara elsevierViewall">Currently&#44; the data show that this method has a sensitivity of 99&#46;3&#37; and a specificity of 92&#46;3&#37; for the diagnosis of infection due to novel virus influenza A &#40;H1N1&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib46">46</a> We recommend the following types of cases to be submitted for the test&#58;</p><p id="para800" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist80"><li class="elsevierStyleListItem" id="celistitem370"><span class="elsevierStyleLabel">a&#41;</span><p id="para810" class="elsevierStylePara elsevierViewall">patients who require hospitalization</p></li><li class="elsevierStyleListItem" id="celistitem380"><span class="elsevierStyleLabel">b&#41;</span><p id="para820" class="elsevierStylePara elsevierViewall">patients with risk factors for severe forms of disease</p></li><li class="elsevierStyleListItem" id="celistitem390"><span class="elsevierStyleLabel">c&#41;</span><p id="para830" class="elsevierStylePara elsevierViewall">patients in an individualized protocol &#8211; according to the clinical judgment</p></li></ul></p><p id="para840" class="elsevierStylePara elsevierViewall">No validated rapid bedside diagnostic test is presently available to detect novel influenza A &#40;H1N1&#41; virus infection&#46; As part of the HC &#8220;bundles&#8221; for control of novel H1N1 infection&#44; a real-time RT-PCR is available for patients and workers who fill criteria to be tested&#46;</p></span><span id="cesec90" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle100">7&#46; TREATMENT AND PROPHYLAXIS</span><p id="para850" class="elsevierStylePara elsevierViewall">The novel influenza A &#40;H1N1&#41; virus is currently susceptible to the antiviral medications known as neuraminidase inhibitors &#40;NAIs&#41;&#44; specifically oseltamivir and zanamivir&#46;<a class="elsevierStyleCrossRefs" href="#bib49">49&#44;50</a> The virus is resistant to the adamantane medications amantadine or rimantadine&#46;<a class="elsevierStyleCrossRef" href="#bib49">49</a> Clinical efficacy data on antiviral treatment are not yet available&#46; Based on its <span class="elsevierStyleItalic">in vitro</span> susceptibility patterns and the clinical experiences derived from seasonal and avian influenza infection&#44; early administration of NAIs might reduce the severity and duration of illness caused by the novel H1N1 virus infection and might also help to prevent progression to severe disease and death&#46;<a class="elsevierStyleCrossRef" href="#bib51">51</a> Only sporadic cases of oseltamivir-resistant 2009 influenza A &#40;H1N1&#41; viruses have been detected worldwide&#44; including nine cases in the United States&#46;<a class="elsevierStyleCrossRef" href="#bib52">52</a> Eight of nine patients had a documented exposure to oseltamivir through either treatment or prophylaxis&#46;<a class="elsevierStyleCrossRef" href="#bib52">52</a></p><p id="para860" class="elsevierStylePara elsevierViewall">Clinical judgment is an important factor in the treatment decision&#46; People with suspected novel H1N1 influenza who present with an uncomplicated febrile illness typically do not require treatment unless they are at higher risk for influenza complications&#44; and in areas with limited antiviral availability&#44; local public health authorities might provide guidance about prioritizing treatment within groups at higher risk&#46;<a class="elsevierStyleCrossRef" href="#bib53">53</a></p><p id="para870" class="elsevierStylePara elsevierViewall">Antiviral therapy may be beneficial&#44; especially for the following groups&#58;<a class="elsevierStyleCrossRef" href="#bib54">54</a></p><p id="para880" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist90"><li class="elsevierStyleListItem" id="celistitem400"><span class="elsevierStyleLabel">1&#46;</span><p id="para890" class="elsevierStylePara elsevierViewall">All hospitalized patients with confirmed&#44; probable&#44; or suspected novel influenza &#40;H1N1&#41;&#46;</p></li><li class="elsevierStyleListItem" id="celistitem410"><span class="elsevierStyleLabel">2&#46;</span><p id="para900" class="elsevierStylePara elsevierViewall">Patients who are at a higher risk for complications &#40;listed above&#41;&#46;</p></li></ul></p><p id="para910" class="elsevierStylePara elsevierViewall">If used&#44; antiviral treatment should ideally be initiated early&#44; as soon as possible&#44; but it may also be used at any stage of the active disease when ongoing viral replication is anticipated or documented&#46; Evidence for the benefits of antiviral treatment in studies of seasonal influenza is highest when treatment is started within 48 hours of the onset of illness&#46;<a class="elsevierStyleCrossRef" href="#bib55">55</a> However&#44; studies investigating oseltamivir treatment of hospitalized patients have indicated a benefit&#44; including reductions of mortality or duration of hospital stay&#44; even for patients whose treatment was initiated after 48 hours&#46;<a class="elsevierStyleCrossRef" href="#bib56">56</a></p><p id="para920" class="elsevierStylePara elsevierViewall">There are important pharmacological differences to consider when choosing NAIs for treatment&#46; Oseltamivir is administered orally and provides a higher systemic level&#46;<a class="elsevierStyleCrossRef" href="#bib57">57</a> Zanamivir is delivered by oral inhalation&#44; with low systemic absorption&#46;<a class="elsevierStyleCrossRef" href="#bib57">57</a> Oseltamivir is the recommended treatment for lower respiratory tract complications&#46;<a class="elsevierStyleCrossRef" href="#bib57">57</a> The recommended treatment duration is five days&#46; In Brazil&#44; oseltamivir is used for the treatment and prophylaxis of S-OIV infection &#40;<a class="elsevierStyleCrossRef" href="#t1-cln_64p1015">Tables 1</a>&#44; <a class="elsevierStyleCrossRefs" href="#t2-cln_64p1015">2 and 3</a>&#41;&#46;</p><elsevierMultimedia ident="t1-cln_64p1015"></elsevierMultimedia><elsevierMultimedia ident="t3-cln_64p1015"></elsevierMultimedia><elsevierMultimedia ident="t2-cln_64p1015"></elsevierMultimedia><p id="para930" class="elsevierStylePara elsevierViewall">Rare neuropsychiatric symptoms&#44; such as confusion or abnormal behavior&#44; have occurred after beginning treatment for seasonal influenza with oseltamivir&#44; particularly in children&#44; but the contribution of oseltamivir to these events remains unknown&#46;<a class="elsevierStyleCrossRef" href="#bib58">58</a></p><p id="para940" class="elsevierStylePara elsevierViewall">Post-exposure antiviral chemoprophylaxis with either oseltamivir or zanamivir for 10 days can be considered for the following situations&#58;<a class="elsevierStyleCrossRef" href="#bib59">59</a></p><p id="para950" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist100"><li class="elsevierStyleListItem" id="celistitem420"><span class="elsevierStyleLabel">1&#46;</span><p id="para960" class="elsevierStylePara elsevierViewall">Close contact of cases &#40;confirmed&#44; probable&#44; or suspected&#41; who are at a high risk for influenza complications</p></li><li class="elsevierStyleListItem" id="celistitem430"><span class="elsevierStyleLabel">2&#46;</span><p id="para970" class="elsevierStylePara elsevierViewall">Health care personnel&#44; public health workers&#44; or first responders who have had a recognized&#44; unprotected close contact exposure to a person with novel &#40;H1N1&#41; influenza virus infection during the patient&#8217;s infectious period&#46;</p></li></ul></p><p id="para980" class="elsevierStylePara elsevierViewall">In patients presenting renal failure&#44; with a creatinine clearance between 10 and 30 ml&#47;min&#47;m2&#44; a 50&#37; dosage reduction of oseltamivir is recommended&#46;<a class="elsevierStyleCrossRef" href="#bib60">60</a> There are no data available on the ideal dosage during renal replacement therapy&#46; Patients with hepatic failure do not require dosage correction&#46;<a class="elsevierStyleCrossRef" href="#bib60">60</a></p><p id="para990" class="elsevierStylePara elsevierViewall">Zanamivir is indicated for the treatment of influenza in adults and children &#40;&#62;5 years&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib57">57</a> The recommended dose for treatment of adults and children older than 5 years of age is two inhalations &#40;2 &#215; 5mg&#41; twice daily for 5 days&#46; Inhaled zanamivir has been temporally associated with bronchospasm&#44; and patients with preexisting airway disease appear to be at an increased risk for this severe adverse reaction&#46;<a class="elsevierStyleCrossRef" href="#bib57">57</a></p><p id="para1000" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Available products in Brazil&#58;</span></p><p id="para1010" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist110"><li class="elsevierStyleListItem" id="celistitem440"><span class="elsevierStyleLabel">a&#41;</span><p id="para1020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Tamiflu&#174; Roche</span> &#8211; 75-mg capsule and 52-ml oral suspension &#40;12 mg&#47;ml&#41;</p></li><li class="elsevierStyleListItem" id="celistitem450"><span class="elsevierStyleLabel">b&#41;</span><p id="para1030" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Oseltamivir Farmanguinhos &#8211;</span> 75-mg capsule</p></li><li class="elsevierStyleListItem" id="celistitem460"><span class="elsevierStyleLabel">c&#41;</span><p id="para1040" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Oseltamivir HC</span> &#8211; 50-ml oral suspension &#40;15 mg&#47;ml&#41;</p></li></ul></p></span><span id="cesec100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle110">8&#46; PREVENTION</span><p id="para1050" class="elsevierStylePara elsevierViewall">Until now&#44; no vaccine has been commercially available to protect against novel H1N1 virus&#44; although there are everyday actions known to prevent the spread of infection&#44; such as&#58;<a class="elsevierStyleCrossRef" href="#bib61">61</a><ul class="elsevierStyleList" id="celist120"><li class="elsevierStyleListItem" id="celistitem470"><span class="elsevierStyleLabel">&#8226;</span><p id="para1060" class="elsevierStylePara elsevierViewall">Wash your hands often with soap and water&#46; Alcohol-based hand cleaners are also effective&#46;</p></li><li class="elsevierStyleListItem" id="celistitem480"><span class="elsevierStyleLabel">&#8226;</span><p id="para1070" class="elsevierStylePara elsevierViewall">Try to avoid close contact with sick people&#46;</p></li><li class="elsevierStyleListItem" id="celistitem490"><span class="elsevierStyleLabel">&#8226;</span><p id="para1080" class="elsevierStylePara elsevierViewall">Cover your nose and mouth with a tissue when you cough or sneeze&#46;</p></li><li class="elsevierStyleListItem" id="celistitem500"><span class="elsevierStyleLabel">&#8226;</span><p id="para1090" class="elsevierStylePara elsevierViewall">Stay home if you are sick for 7 days after your symptoms begin or until you have been symptom-free for 24 hours&#46;</p></li><li class="elsevierStyleListItem" id="celistitem510"><span class="elsevierStyleLabel">&#8226;</span><p id="para1100" class="elsevierStylePara elsevierViewall">Follow public health advice regarding school closures&#44; avoid crowds&#46;</p></li></ul></p></span><span id="cesec110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle120">9&#46; CARE OF PATIENTS WITH CONFIRMED&#44; SUSPECTED&#44; OR PROBABLE INFECTION WITH THE NOVEL VIRUS INFLUENZA A &#40;H1&#47;N1&#41;</span><p id="para1110" class="elsevierStylePara elsevierViewall">Health care professionals must use the following personal protective equipment<a class="elsevierStyleCrossRef" href="#bib62">62</a>&#58;</p><p id="para1120" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist130"><li class="elsevierStyleListItem" id="celistitem520"><span class="elsevierStyleLabel">a&#41;</span><p id="para1130" class="elsevierStylePara elsevierViewall">A surgical mask when the professional is working at a distance of less than1 meter from the patients&#44; in procedures without aerosol production&#46;</p></li><li class="elsevierStyleListItem" id="celistitem530"><span class="elsevierStyleLabel">b&#41;</span><p id="para1140" class="elsevierStylePara elsevierViewall">Special clothes to avoid contact with blood and fluids&#46;</p></li><li class="elsevierStyleListItem" id="celistitem540"><span class="elsevierStyleLabel">c&#41;</span><p id="para1150" class="elsevierStylePara elsevierViewall">A N95 mask&#44; protective glasses&#44; and gloves in procedures with aerosol production&#44; such as intubation&#44; secretion manipulation&#44; and autopsies&#46;</p></li></ul></p></span><span id="cesec120" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle130">10&#46; HC &#8220;BUNDLES&#8221; FOR NOVEL INFLUENZA A &#40;H1N1&#41; INFECTION</span><p id="para1160" class="elsevierStylePara elsevierViewall">As already mentioned&#44; as a reference center for H1N1 infection&#44; the Hospital das Cl&#237;nicas da Universidade de S&#227;o Paulo created the &#8220;Cabinet Crisis&#8221; with the objectives of implementing &#8220;bundles&#8221; for control of S-OIV infection&#44; a group of interventions to obtain better outcomes in the management of this disease&#46; We adopted some measures to obtain continuous and everyday information on the H1N1 infection&#44; to implement actions to control the pandemics and to evaluate the impact of these interventions such as&#58;</p><p id="para1170" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="celist140"><li class="elsevierStyleListItem" id="celistitem550"><span class="elsevierStyleLabel">1&#46;</span><p id="para1180" class="elsevierStylePara elsevierViewall">Periodical meetings among healthcare professionals from all institutions &#8211; directors&#44; professors&#44; epidemiologists&#44; infectologists&#44; intensive care physicians &#8211; to discuss new data and information about the disease</p></li><li class="elsevierStyleListItem" id="celistitem560"><span class="elsevierStyleLabel">2&#46;</span><p id="para1190" class="elsevierStylePara elsevierViewall">Continuous local Epidemiologic Surveillance to collect and analyze the data to assess the impact of the virus and determine the groups at an increased risk of complications&#46;</p></li><li class="elsevierStyleListItem" id="celistitem570"><span class="elsevierStyleLabel">3&#46;</span><p id="para1200" class="elsevierStylePara elsevierViewall">Information for all professionals and patients about the infection&#44; symptoms&#44; diagnosis&#44; and prevention&#46;</p></li><li class="elsevierStyleListItem" id="celistitem580"><span class="elsevierStyleLabel">4&#46;</span><p id="para1210" class="elsevierStylePara elsevierViewall">Availability of a real time RT-PCR for novel influenza A &#40;H1N1&#41; virus in admitted patients&#46;</p></li><li class="elsevierStyleListItem" id="celistitem590"><span class="elsevierStyleLabel">5&#46;</span><p id="para1220" class="elsevierStylePara elsevierViewall">Reduction of daily visits of families to the hospital&#46;</p></li><li class="elsevierStyleListItem" id="celistitem600"><span class="elsevierStyleLabel">6&#46;</span><p id="para1230" class="elsevierStylePara elsevierViewall">Implementation of hygienic measures&#58; alcohol-based hand cleaner&#44; gloves&#44; masks&#46;</p></li><li class="elsevierStyleListItem" id="celistitem610"><span class="elsevierStyleLabel">7&#46;</span><p id="para1240" class="elsevierStylePara elsevierViewall">Internet published recommendations on the management of infection &#40;<a href="http://www.hcnet.usp.br">www&#46;hcnet&#46;usp&#46;br</a>&#41;</p></li><li class="elsevierStyleListItem" id="celistitem620"><span class="elsevierStyleLabel">8&#46;</span><p id="para1250" class="elsevierStylePara elsevierViewall">Specific units for the care of patients with suspected or confirmed S-OIV infection including emergency room attending&#44; regular ward and specialized intensive care units&#46;</p></li><li class="elsevierStyleListItem" id="celistitem630"><span class="elsevierStyleLabel">9&#46;</span><p id="para1260" class="elsevierStylePara elsevierViewall">Guidance for the staff and coworkers to limit contact with other people when symptoms are present&#46;</p></li><li class="elsevierStyleListItem" id="celistitem640"><span class="elsevierStyleLabel">10&#46;</span><p id="para1270" class="elsevierStylePara elsevierViewall">Risk groups specialized protocols of care&#58; pregnant women&#44; children&#44; immunocompromised patients&#44; and chronic diseases&#46;</p></li><li class="elsevierStyleListItem" id="celistitem650"><span class="elsevierStyleLabel">11&#46;</span><p id="para1280" class="elsevierStylePara elsevierViewall">Immediate availability of antiviral therapy&#46;</p></li></ul></p><p id="para1290" class="elsevierStylePara elsevierViewall">In the last weeks&#44; we could observe a significant reduction in the incidence and mortality of novel influenza A &#40;H1N1&#41; infection in S&#227;o Paulo and in Hospital das Cl&#237;nicas&#46; We suppose that an association of factors contribute to these numbers including a global actions plan&#44; the continuous epidemiologic monitoring and the acquired expertise to diagnosis and adequate treatment of patients&#46; We wish to maintain all the adopted measures in Hospital das Cl&#237;nicas with the ongoing objective of obtain better outcomes in the management of novel influenza A &#40;H1N1&#41; infection&#46; With the accumulating experience and groups of study&#44; we hope to contribute continuously with information regarding epidemiology&#44; pathogenesis and clinical aspects of this pandemics&#46;</p></span><span id="cesec130" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle140">11&#46; CONCLUSIONS AND PERSPECTIVES</span><p id="para1300" class="elsevierStylePara elsevierViewall">The 2009 pandemic novel influenza A &#40;H1N1&#41; infection continues to spread globally and displays the complexity of preexisting viruses&#44; which become highly transmissible through genetic mutations and reassortments&#46; In less than 200 days of known disease in humans&#44; we learned that the replication competence and virulence of the novel H1N1 virus enable it to cause severe clinical presentations and death&#46; As a consequence of this outbreak&#44; the world learned the value of nonpharmacologic interventions&#44; which can save many lives&#46; A vaccine is expected as a potential control measure for the pandemic&#46;<a class="elsevierStyleCrossRef" href="#bib63">63</a> In the Hospital das Cl&#237;nicas da Universidade de S&#227;o Paulo&#44; a &#8220;Cabinet Crisis&#8221; was created to implement a group of interventions to obtain better outcomes in the management of H1N1 infection&#46;</p><p id="para1310" class="elsevierStylePara elsevierViewall">In our opinion&#44; to control this pandemic&#44; global actions are required without a geographic barrier&#46; More studies are needed in zoonotic virology to allow a better understanding concerning the pathogenesis and epidemiologic aspects of the new viruses to prevent emergent diseases&#46;</p></span></span>"
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              "titulo" => "5&#46;2 Intensive care"
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          "titulo" => "6&#46; DIAGNOSIS"
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          "titulo" => "7&#46; TREATMENT AND PROPHYLAXIS"
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          "titulo" => "9&#46; CARE OF PATIENTS WITH CONFIRMED&#44; SUSPECTED&#44; OR PROBABLE INFECTION WITH THE NOVEL VIRUS INFLUENZA A &#40;H1&#47;N1&#41;"
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        10 => array:2 [
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          "titulo" => "10&#46; HC &#8220;BUNDLES&#8221; FOR NOVEL INFLUENZA A &#40;H1N1&#41; INFECTION"
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          "titulo" => "11&#46; CONCLUSIONS AND PERSPECTIVES"
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    "fechaRecibido" => "2009-09-22"
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            1 => "Hospital das Cl&#237;nicas"
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        "resumen" => "<span id="ceabs10" class="elsevierStyleSection elsevierViewall"><p id="spara60" class="elsevierStyleSimplePara elsevierViewall">The pandemic novel influenza A &#40;H1N1&#41; infection was considered widespread in Brazil on July&#44; 2009&#46; Since then&#44; 9&#46;249 cases were confirmed in Brazil&#44; most of them concentrated in S&#227;o Paulo&#46; The Hospital das Cl&#237;nicas of the University of S&#227;o Paulo is a reference center for H1N1 cases in S&#227;o Paulo&#46; The purpose of this review is to analyze the evidence concerning diagnosis&#44; prevention&#44; and treatment of novel influenza A &#40;H1N1&#41; infection&#46; In addition&#44; we propose guidelines for the management of this pandemic emphasizing Hospital das Cl&#237;nicas &#8220;bundles&#8221; for the control of the pandemic novel influenza A &#40;H1N1&#41;&#46;</p></span>"
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          "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Spectrum of novel influenza A &#40;H1N1&#41; infection</p>"
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Adults&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">75-mg capsule twice per day for 5 days&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">75-mg capsule once per day for 10 days&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Children &#8805; 12 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 kg or less&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">60 mg per day divided into 2 doses&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">30 mg once per day&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&#8211;23 kg&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">90 mg per day divided into 2 doses&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">45 mg once per day&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">24&#8211;40 kg&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">120 mg per day divided into 2 doses&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">60 mg once per day&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&#62;40 kg&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">150 mg per day divided into 2 doses&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">75 mg once per day&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Recommended antiviral treatment and prophylaxis for novel influenza A &#40;H1N1&#41; infection</p>"
        ]
      ]
      3 => array:7 [
        "identificador" => "t2-cln_64p1015"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:1 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Recommended treatment for 5 days&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#60;3 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12 mg twice daily&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#8211;5 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20 mg twice daily&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">6&#8211;11 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">25 mg twice daily&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara40" class="elsevierStyleSimplePara elsevierViewall">Recommended antiviral treatment for children younger than 1 year using oseltamivir</p>"
        ]
      ]
      4 => array:7 [
        "identificador" => "t3-cln_64p1015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:1 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Recommended prophylaxis for 10 days&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#60;3 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Not recommended unless the situation is judged as critical&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#8211;5 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20 mg once daily&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">6&#8211;11 months&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">25 mg once daily&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spara50" class="elsevierStyleSimplePara elsevierViewall">Recommended antiviral chemoprophylaxis for children younger than 1 year using oseltamivir</p>"
        ]
      ]
    ]
    "bibliografia" => array:2 [
      "titulo" => "REFERENCES"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "cebibsec10"
          "bibliografiaReferencia" => array:63 [
            0 => array:3 [
              "identificador" => "bib1"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:1 [
                      "titulo" => "Update&#58; swine influenza A &#40;H1N1&#41; infections&#8211;California and Texas&#44; April 2009"
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "MMWR Morb Mortal Wkly Rep"
                        "fecha" => "2009"
                        "volumen" => "58"
                        "paginaInicial" => "435"
                        "paginaFinal" => "437"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19407739"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            1 => array:3 [
              "identificador" => "bib2"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:1 [
                      "titulo" => "Update&#58; novel influenza A &#40;H1N1&#41; virus infection - Mexico&#44; March&#8211;May&#44; 2009"
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "MMWR Morb Mortal Wkly Rep"
                        "fecha" => "2009"
                        "volumen" => "58"
                        "paginaInicial" => "585"
                        "paginaFinal" => "589"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19498336"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
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            ]
            2 => array:3 [
              "identificador" => "bib3"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:1 [
                      "titulo" => "Swine influenza A &#40;H1N1&#41; infection in two children&#8211;Southern California&#44; March&#8211;April 2009"
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "MMWR Morb Mortal Wkly Rep&#46;"
                        "fecha" => "2009"
                        "volumen" => "58"
                        "paginaInicial" => "400"
                        "paginaFinal" => "402"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19390508"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
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                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib4"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Emergence of a novel swine-origin influenza A &#40;H1N1&#41; virus in humans"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => """
                              FS Dawood \n
                              \t\t\t\t\t\t\t\t
                              """
                            1 => """
                              S Jain \n
                              \t\t\t\t\t\t\t\t
                              """
                            2 => """
                              L Finelli \n
                              \t\t\t\t\t\t\t\t
                              """
                            3 => """
                              MW Shaw \n
                              \t\t\t\t\t\t\t\t
                              """
                            4 => """
                              S Lindstrom \n
                              \t\t\t\t\t\t\t\t
                              """
                            5 => """
                              RJ Garten \n
                              \t\t\t\t\t\t\t\t
                              """
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMoa0903810"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2009"
                        "volumen" => "360"
                        "paginaInicial" => "2605"
                        "paginaFinal" => "2615"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19423869"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib5"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:1 [
                      "titulo" => "Pandemic &#40;H1N1&#41; 2009 - ECDC Daily Update&#46; 2009&#46; Accessed August 24&#44; 2009"
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "WWW" => array:1 [
                        "link" => "http&#58;&#47;&#47;www&#46;ecdc&#46;europa&#46;eu&#47;en&#47;healthtopics&#47;Documents&#47;090821&#95;Influenza&#95;AH1N1&#95;Situation&#95;Report&#95;1700hrs&#46;pdf"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            5 => array:3 [
              "identificador" => "bib6"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Host range and emerging and reemerging pathogens"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => """
                              ME Woolhouse \n
                              \t\t\t\t\t\t\t\t
                              """
                            1 => """
                              S Gowtage-Sequeria \n
                              \t\t\t\t\t\t\t\t
                              """
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.3201/eid1112.050997"
                      "Revista" => array:6 [
                        "tituloSerie" => "Emerg Infect Dis"
                        "fecha" => "2005"
                        "volumen" => "11"
                        "paginaInicial" => "1842"
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                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16485468"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            6 => array:3 [
              "identificador" => "bib7"
              "etiqueta" => "7"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Emergence of a novel swine-origin influenza A virus &#40;S-OIV&#41; H1N1 virus in humans"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => """
                              JSM Peiris \n
                              \t\t\t\t\t\t\t\t
                              """
                            1 => """
                              LLM Poon \n
                              \t\t\t\t\t\t\t\t
                              """
                            2 => """
                              Yi Guan \n
                              \t\t\t\t\t\t\t\t
                              """
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.jcv.2009.06.006"
                      "Revista" => array:6 [
                        "tituloSerie" => "Journal of Clinical Virology"
                        "fecha" => "2009"
                        "volumen" => "45"
                        "paginaInicial" => "169"
                        "paginaFinal" => "173"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19540800"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            7 => array:3 [
              "identificador" => "bib8"
              "etiqueta" => "8"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The persistent legacy of the 1918 influenza virus"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => """
                              DM Morens \n
                              \t\t\t\t\t\t\t\t
                              """
                            1 => """
                              JK Taubenberger \n
                              \t\t\t\t\t\t\t\t
                              """
                            2 => """
                              AS Fauci \n
                              \t\t\t\t\t\t\t\t
                              """
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMp0904819"
                      "Revista" => array:7 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2009"
                        "volumen" => "361"
                        "numero" => "3"
                        "paginaInicial" => "225"
                        "paginaFinal" => "229"
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        "texto" => "<p id="para1320" class="elsevierStylePara elsevierViewall">Adriana Sayuri Hirota&#44; Werther Brunow de Carvalho&#44; Alberto Jos&#233; da Silva Duarte&#44; Felipe Silva Fittipaldi&#44; Ho Yeh Li&#44; Marcelo Magri&#44; Marcelo Park&#44; Marcelo Zugaib&#44; Pedro Paulo Pereira&#44; Rossana Pulcineli Vieira Francisco&#44; Ruy Pires Neto&#44; Sonia Lucena Cipriano&#44; Vanusa Barbosa Pinto&#44; and Clarisse Machado&#44; and Renata Lobo&#46;</p>"
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Article information

ISSN: 18075932
Original language: English

DOI:10.1590/S1807-59322009001000013

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Year/Month	Html	Pdf	Total

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2024 October	42	17	59
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2024 July	26	20	46
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