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BIBTEX RIS

Evaluation of fluconazole resistance mechanisms in candida albicans clinical isolates from HIV-infected patients in Brazil

2004; Elsevier BV; Volume: 50; Issue: 1 Linguagem: Inglês

10.1016/j.diagmicrobio.2004.04.009

1879-0070

Gustavo H. Goldman, Márcia Eliana da Silva Ferreira, Everaldo dos Reis Marques, Marcela Savoldi, David S. Perlin, Steven Park, Patricio Martı́nez, Maria Helena S. Goldman, Arnaldo Lopes Colombo,

Pneumocystis jirovecii pneumonia detection and treatment

In this study, we describe resistance mechanisms in fluconazole-resistant isolates of C. albicans isolated from AIDS patients from nine Brazilian hospitals. These mechanisms include the presence of point mutations in the ERG11 gene and overexpression of ERG11, and several genes encoding efflux pumps, as measured by quantitative real-time reverse transcriptase polymerase chain reaction. Several fluconazole-resistant strains had multiple mechanisms of resistance. Four mutations previously described, Y132F, K143R, E266D, and V437I, were identified among the strains, whereas some isolates contained more than one mutation. Fourteen novel mutations were identified. Interestingly, all Brazilian fluconazole-resistant isolates showed homozygosity at mating-type loci (MTL) associated with fluconazole resistance. This is the first comprehensive assessment at molecular level of mechanisms of fluconazole resistance in C. albicans isolates from South America.