FIG. 4.

Hyphal formation in series 1 isolates in the presence of fluconazole and ketoconazole correlates with MICs of azoles. Five isolates (isolates A1 to A5) from a series of 17 isolates (Table 1) were tested for hyphal formation. Each isolate differed in its level of resistance (MIC) to fluconazole (solid square) and ketoconazole (solid circle). The isolates were tested for hyphal formation in the absence of an azole drug (open triangle), with fluconazole at a concentration of 10 μg/ml (open square), and with ketoconazole at a concentration of 2 μg/ml (open circle). Cells were grown in YAD and were induced in M199.