En enfermos graves con sonda vesicalel aislamiento de Candida spp. en orina se consideraun signo de mal pronostico. Existen controversiassobre la etiologia y el tratamiento antifungico.
Pacientes y metodoEn un estudio prospectivo de560 ingresados en la unidad de medicina intensivase determino la prevalencia de las especies de Candida en orina y su sensibilidad in vitro al fluconazolpor medio del E-test.
ResultadosEn 60 pacientes (11%) se aislo Candida después de cambiar la sonda. El 56,7% correspondio a Candida albicans, el 21,7% a C. glabrata, el 15% a C. tropicalis, el 5% a C. parapsilosis y el 1,7% a C. kefyr. Solamente un aislado de C. albicans y otro de C. glabrata presentaron una concentracion inhibitoriaminima (CIM) de 64 µg/ml o mayor, considerandoseresistentes. El 91% presento una CIM de 0,125a 8 µg/ml. La CIM90 de C. albicans y C. tropicalis resulto de 1 µg/ml, mientras que para C. glabrata fue de 16 µg/ml.
ConclusionesC. albicans sigue siendo la especiemas frecuente en orina; no obstante, en mas del40% de los casos se aislan otras especie, principalmente C. glabrata y C. tropicalis. La gran mayoriade los aislados de Candida spp. es sensible in vitro al fluconazol.
The isolation of Candida species inurine in patients admitted in intensive care unitswho bear a vesical catheter is considered as a signof bad prognosis. The etiological mechanisms andthe appropriateness of administering an antifungaltreatment in these patients is controversial.
Patients and methodThe prevalence of Candida species in urine and the in vitro susceptibility tofluconazole by means of the E-test were determinedin 560 patients admitted in an intensive careunit.
ResultsIn 60 patients (11%) Candida specieswas isolated in urine after catheter replacement.56.7% of isolates corresponded to C. albicans, 21.7% to C. glabrata, 15% to C. tropicalis, 5% to C. parapsilosis and 1.7% to C. kefyr. Only two isolates (C. albicans and C. glabrata) had a minimal inhibitory concentration (MIC). 64 µg/ml (whichwas regarded as resistant) and 91% of strains hada MIC between 0.125 and 8 µg/ml. MIC 90% for C. albicans and C. tropicalis was 1 µg/ml, while itwas 16 µg/ml for C. glabrata.
ConclusionsC. albicans is the most frequent speciesisolated in urine in these patients. However,over 40% of cases are found to have non-albicansspecies, especially C. glabrata and C. tropicalis. The majority of Candida isolates (91%) are sensitivein vitro to fluconazole.