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Rev. Soc. Bras. Med. Trop ; 41(2): 158-162, mar.-abr. 2008. tab
Article in Portuguese | LILACS | ID: lil-484221

ABSTRACT

Este trabalho identificou variedades de Cryptococcus neoformans e avaliou a suscetibilidade a antifúngicos pelo protocolo M27-A2 do National Committee for Clinical Laboratory Standards em isolados de 35 pacientes do Hospital Escola da Universidade Federal do Triângulo Mineiro. A variedade gatti foi identificada em 11.4 por cento (nº = 4) dos casos. A concentração inibitória mínima (mg/ml) dos isolados de Cryptococcus neoformans neoformans variou de 0,062 - 2,000 (anfotericina B), 0,250 - 8,000 (fluconazol), 0,062 - 1,000 (itraconazol) e 0,125 - 1,000 (cetoconazol). A variedade gattii apresentou concentração inibitória mínima de 0,125 - 2,000 (anfotericina B), 0,250 - 16,00 (fluconazol), 0,062 - 1,000 (itraconazol) e 0,125 - 4,000 (cetoconazol). Detectaram-se 2 isolados resistentes ao itraconazol e 2 a anfotericina B (1 isolado de cada variedade por antifúngico). Os dados mostram a importância da determinação da variedade e da concentração inibitória mínima de isolados de Cryptococcus neoformans para monitorar o desenvolvimento de resistência e possibilitar uma terapia mais adequada na criptococose.


This study identified Cryptococcus neoformans varieties isolated from 35 patients at teaching hospital of the Federal University of the Triângulo Mineiro and evaluated the susceptibility to antifungal agents among these samples using the protocol M27-A2 from the National Committee for Clinical Laboratory Standards. The gattii variety was identified in 11.4 percent of the cases (n = 4). The minimum inhibitory concentration (mg/ml) of Cryptococcus neoformans neoformans isolates ranged from 0.062 to 2.000 (amphotericin B), 0.250 to 8.000 (fluconazole), 0.062 to 1.000 (itraconazole) and 0.125 to 1.000 (ketoconazole). The gattii variety presented a minimum inhibitory concentration range of 0.125 to 2.000 (amphotericin B), 0.250 to 16.00 (fluconazole), 0.062 to 1.000 (itraconazole) and 0.125 to 4.000 (ketoconazole). Two isolates resistant to itraconazole and two resistant to amphotericin B (one isolate of each variety per antifungal agent) were found. These data show the importance of determining the variety and minimum inhibitory concentration of Cryptococcus neoformans isolates, in order to monitor resistance development and enable better treatment for cryptococcosis.


Subject(s)
Adult , Female , Humans , Male , Antifungal Agents/pharmacology , Cryptococcus neoformans/drug effects , Amphotericin B/pharmacology , Brazil , Cryptococcosis/microbiology , Cryptococcus neoformans/isolation & purification , Fluconazole/pharmacology , Hospitals, University , Itraconazole/pharmacology , Ketoconazole/pharmacology , Microbial Sensitivity Tests
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