Susceptibilities of clinical and laboratory isolates of Blastomyces dermatitidis to ketoconazole, itraconazole, and fluconazole.
Eighteen isolates of Blastomyces dermatitidis were evaluated for their in vitro susceptibilities to ketoconazole, itraconazole, and fluconazole. The MIC ranges were 0.1 to 0.4 microg/ml for ketoconazole, < or =0.018 to 0.07 microg/ml for itraconazole, and 2.5 to 4.0 microg/ml for fluconazole. The ranges for the minimal lethal concentrations were 0.2 to 0.8 microg/ml for ketoconazole, < or =0.018 to 0.07 microg/ml for itraconazole, and 10 to 40 microg/ml for fluconazole. Itraconazole was the most active agent against B. dermatitidis in vitro, while fluconazole was the least active. These results correlate with the clinical efficacies noted to date with doses of these agents used to treat blastomycosis.
Chapman
S W
SW
Department of Microbiology, School of Medicine, University of Mississippi Medical Center, Jackson 39216-4505, USA. schapman@umsmed.edu
Rogers
P D
PD
Rinaldi
M G
MG
Sullivan
D C
DC
D000935:Antifungal Agents / Q000494:pharmacology*; D001758:Blastomyces / Q000187:drug effects*; D015725:Fluconazole / Q000494:pharmacology*; D017964:Itraconazole / Q000494:pharmacology*; D007654:Ketoconazole / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests
D000935:Antifungal Agents; D017964:Itraconazole; D015725:Fluconazole; D007654:Ketoconazole