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Five azole-susceptible Candida glabrata isolates obtained before 1975 became resistant to fluconazole, itraconazole, and voriconazole within 4 days of in vitro fluconazole exposure. This cross-resistance was stable for at least 4 months after removal of fluconazole and was associated with increased CgCDR1 and CgCDR2 expression.
Borst et al. (Wed,) studied this question.