Journal of Antimicrobial Chemotherapy, Vol 42, 741-745, Copyright © 1998 by The British Society for Antimicrobial Chemotherapy
EM Johnson, A Szekely and DW Warnock
The in-vitro fungistatic and fungicidal activities of voriconazole were
compared with those of itraconazole and amphotericin B. MICs for 110
isolates belonging to 11 species of filamentous fungi were determined by a
broth microdilution adaptation of the method recommended by the National
Committee for Clinical Laboratory Standards. Minimum lethal concentrations
(MLCs) of the three antifungal agents were also determined. The MIC ranges
of the three compounds were comparable for Aspergillus flavus, Aspergillus
fumigatus, Cladophialophora bantiana and Exophiala dermatitidis.
Voriconazole and itraconazole were more active than amphotericin B against
Fonsecaea pedrosoi, but the two azole agents were less active against
Sporothrix schenckii. Voriconazole was more active than itraconazole or
amphotericin B against Scedosporium apiospermum, but less active than the
other two agents against two mucoraceous moulds, Absidia corymbifera and
Rhizopus arrhizus. Voriconazole and amphotericin B were more active than
itraconazole against Fusarium solani. With the exception of S. apiospermum,
all the moulds tested had MLC50 values of < or =2 mg/L and MLC90 values
of < or =4 mg/L against amphotericin B. Voriconazole and itraconazole
showed fungicidal effects against five of the 1 1 moulds tested (A. flavus,
A. fumigatus, C. bantiana, E. dermatitidis and F. pedrosoi) with MLC90
values of < or =2 mg/L. In addition, voriconazole was fungicidal for
Phialophora parasitica. Our results suggest that voriconazole could be
effective against a wide range of mould infections in humans.
In-vitro activity of voriconazole, itraconazole and amphotericin B against filamentous fungi [In Process Citation]
Public Health Laboratory, Bristol, UK.
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