JOURNAL ARTICLE

In vitro susceptibility of Aspergillus fumigatus to isavuconazole: correlation with itraconazole, voriconazole, and posaconazole

Lea Gregson, Joanne Goodwin, Adam Johnson, Laura McEntee, Caroline B Moore, Malcolm Richardson, William W Hope, Susan J Howard
Antimicrobial Agents and Chemotherapy 2013, 57 (11): 5778-80
24041890
Triazoles are first-line agents for treating aspergillosis. The prevalence of azole resistance in Aspergillus fumigatus is increasing, and cross-resistance is a growing concern. In this study, the susceptibilities of 40 A. fumigatus clinical isolates were tested by using the CLSI method with amphotericin B, itraconazole, voriconazole, posaconazole, and the new triazole isavuconazole. Isavuconazole MICs were higher in strains with reduced susceptibilities to other triazoles, mirroring changes in voriconazole susceptibility. Isavuconazole MICs differed depending on the Cyp51A substitution.

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