In-vitro activities of amphotericin B, itraconazole and voriconazole against 150 clinical and environmental Aspergillus fumigatus isolates.
The in-vitro activity of amphotericin B, itraconazole and voriconazole against 130 clinical and 20 environmental Aspergillus fumigatus isolates was tested with an agar dilution method using RPMI 1640 medium. Itraconazole-susceptible (AF71) and -resistant (AF90) isolates were included in each test and all isolates were tested in duplicate. Geometric mean MIC values (ranges) at 48 h and 72 h were, respectively, amphotericin B, 0.91 (0.25-2) and 1.50 (1-4) mg/L; itraconazole, 0.25 (0.06-1) and 0.48 (0.125-8) mg/L; and voriconazole, 0.56 (0.25-8) and 0.78 (0.25-8) mg/L. The reproducibility of the results was high for all drugs. In-vitro resistance of A. fumigatus to the tested antifungal agents was uncommon and the MICs of itraconazole were half those of voriconazole (P < 0.01).
Verweij
P E
PE
Department of Medical Microbiology, University Hospital Nijmegen, The Netherlands. P.Verweij@mmb.azn.nl
Mensink
M
M
Rijs
A J
AJ
Donnelly
J P
JP
Meis
J F
JF
Denning
D W
DW
D000666:Amphotericin B / Q000494:pharmacology*; D000935:Antifungal Agents / Q000494:pharmacology*; D001232:Aspergillus fumigatus / Q000187:drug effects* / Q000302:isolation & purification; D004783:Environmental Microbiology; D006801:Humans; D017964:Itraconazole / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D011743:Pyrimidines / Q000494:pharmacology*; D015203:Reproducibility of Results; D014230:Triazoles / Q000494:pharmacology*; D065819:Voriconazole
D000935:Antifungal Agents; D011743:Pyrimidines; D014230:Triazoles; D017964:Itraconazole; D000666:Amphotericin B; D065819:Voriconazole