Vol. 56.Issue. 1. January - March 2024 | Revista Argentina de Microbiología

ISSN: 0325-7541

Revista Argentina de Microbiología is published by the Asociación Argentina de Microbiología (AAM) on a quarterly basis. The aim of this journal is to publish current scientific works in the different areas of Microbiology and Parasitology. Some of the topics considered of special interest are: infections caused by bacteria, fungi, parasites and viruses; mechanisms of pathogenicity, and virulence factors; resistance to antimicrobial agents; taxonomy; epidemiology and phenotypic, immunologic and molecular diagnostic methods. RAM also publishes articles on microbial ecology and diversity, zoo- and phytopathogens and microorganisms of value for food, agronomic, industrial and environmental applications. With the purpose of covering basic aspects of research in the area, the journal is also interested in the publication of manuscripts on microorganism genomics, proteomics and enzymology, as well as in those articles dealing with regional impact.

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Fifty-one percent of teachers had circulating antibodies against O157, O145, O121 and O103 LPS.
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Anti-O157 antibodies were the most abundant found in 43% of the samples.
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Twenty-one of the samples reacted against more than one LPS serotype.
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Twenty percent showed IgM antibodies against at least one LPS serotype.
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Continuous educational programs could help to reduce cases of HUS.

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Comparison of two MALDI-TOF MS systems for the identification of clinically relevant anaerobic bacteria in Argentina

Mirta Litterio, Liliana Castello, María Elena Venuta, Sofía Abel, Liliana Fernández-Canigia, María Cristina Legaria, Raquel Rollet, Daniela Vaustat, ... Claudia Barberis

Rev Argent Microbiol. 2024;56:33-61

Highlights

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MALDI-TOF MS is especially useful for the identification of anaerobic bacteria.
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It is useful for slow-growing microorganisms that are difficult to identify by traditional methods.
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It is essential to update the databases by increasing the number of spectrum.

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Microbiología clínica y enfermedades infecciosas

Reduction in the incidence of invasive infections caused by encapsulated bacteria after the onset of the COVID-19 pandemic

Leda Guzzi, Juan Manuel Sambade, Martin Diego Christin, Federico Rodriguez Cairoli, Alejandra Rodriguez, Silvia Vicario, Miriam Hinojosa Del Carpio, Juan Molinos, Pablo Dimitroff

Rev Argent Microbiol. 2024;56:62-8

Highlights

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IIEB incidence dropped dramatically during the COVID-19 pandemic.
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Reduction coincided with public health measures to contain the pandemic.
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We observed low rates of SARS-COV2 and invasive S. pneumoniae coinfection.
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Case fatality was higher in coinfected patients than in those presenting IPD.

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Asociación del consumo de drogas ilícitas en mujeres embarazadas y sífilis congénita en un Hospital Público de México

Lucía Miramontes-Buiza, Juan Carlos Lona-Reyes, Rene Oswaldo Pérez-Ramírez, Diego Magallón-Picazo, Araceli Cordero-Zamora, Larissa María Gómez-Ruiz, Tania Alejandra Cruz-Chávez

Rev Argent Microbiol. 2024;56:69-73

Highlights

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La incidencia de sífilis congénita fue 10,5 eventos/1000 RN en un Hospital de México.
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El consumo de drogas ilícitas en la madre se asoció a sífilis congénita.
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Las drogas ilícitas de mayor uso fueron las metanfetaminas, marihuana y cocaína.

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Prevalence of Demodex spp. in patients with chronic blepharitis

Viviana Flores, Marina Ruf, Silvia Paola Abad Farfan, Andrea Vanessa Suárez Echávez, Dolores Pilar Bastard, Maria Celeste Puga, Luis Daniel Mazzuoccolo

Rev Argent Microbiol. 2024;56:74-8

Highlights

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High prevalence of Demodex spp. blepharitis in patients older than 60 years old.
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Meibomitis, dandruff, itching, epiphora were associated with blepharitis by Demodex spp.
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Diagnosis of blepharitis by Demodex spp. allows for an adequate treatment.

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Microbiología agrícola, ambiental e industrial

Growth, tolerance, and enzyme activities of Trichoderma strains in culture media added with a pyrethroids-based insecticide

Caliope Mendarte-Alquisira, Alejandro Alarcón, Ronald Ferrera-Cerrato

Rev Argent Microbiol. 2024;56:79-89

Highlights

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Trichoderma spp. strains tolerate 200ppm of pyrethroids and carbamate insecticides.
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Trichoderma spp. consortium growth in liquid culture with 100ppm of insecticide.
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Insecticide promotes the release of proteins and peroxidases by Trichoderma spp.
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Insecticide decreases chitinase and endoglucanase produced by Trichoderma spp.

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Macroencapsulation of Limosilactobacillus reuteri DSPV002C as nutritional supplement for piglets: Storage stability and survival in gastrointestinal conditions

Jorge Alberto Zimmermann, Noelí Sirini, Carolina Raquel Olivero, María Sol Renna, Marcelo Lisandro Signorini, María Virginia Zbrun, Laureano Sebastián Frizzo, Lorena Paola Soto

Rev Argent Microbiol. 2024;56:90-101

Highlights

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Capsules designed with industrial materials are effective as probiotic carrier for pigs.
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Whey permeate protects the inoculum during lyophilization process.
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Freezing and vacuum condition maintain the viability of the inoculum for 210 days.
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Encapsulation protect the inoculum under simulated gastrointestinal conditions.
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Macrocapsules ensure delivery to the site of action in the gastrointestinal tract.

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Microbiología de alimentos

Orlando G. Nagel, Maria L. Gasparotti, Selva I. Machado, Rafael L. Althaus

Rev Argent Microbiol. 2024;56:102-11

Highlights

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Bacteria of the genus Geobacillus have different antimicrobial susceptibilities.
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The bacterial susceptibilities cluster is similar to the bacterial DNA cluster.
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Bioassays with different Geobacillus could be designed to improve commercial test.

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