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The in vitro susceptibilities of 24 molecularly identified dimorphic fungi belonging to the genera Adiaspiromyces, Blastomyces, and Emergomyces within the family Ajellomycetaceae were tested against 8 standard antifungal agents using CLSI document M38-A2. Amphotericin B and posaconazole had the lowest geometric mean MICs (<0.05 μg/ml) followed by itraconazole (<0.07 μg/ml), voriconazole (<0.15 μg/ml), and isavuconazole (<0.42 μg/ml) while fluconazole was not active. Micafungin demonstrated good in vitro antifungal activity against Emergomyces (geometric mean minimum effective concentration [GM MEC] 0.1 μg/ml) and Blastomyces (GM MEC <0.017 μg/ml).

PMID: 29084748 PMCID: PMC5740316