Abstract
The extensive use of fluconazole in the previous two decades has fostered the emergence of azole-resistant strains, including non-albicans species such as C. glabrata. The main mechanisms of fluconazole resistance described involve alteration of the quality or quantity of 14-alpha-demethylase enzyme or reduced access of the drug to the target enzyme by upregulation of efflux pumps. Fluconazole prophylaxis has been used successfully to prevent fungal infections in high-risk neonates, neutropenic patients, individuals with HIV infection, recipients of solid organ (eg, liver) transplants and bone marrow transplants, and patients in intensive care units, with a small increase in the risk of colonization, but not infection, with fluconazole-resistant Candida isolates. Among other risk factors, recent fluconazole exposure is associated with fluconazole-resistant candidemia.
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