Effect of pH on the in vitro activities of amphotericin B, itraconazole, and flucytosine against Aspergillus isolates.
SourceAntimicrobial Agents and Chemotherapy, 48, 8, (2004), pp. 3147-3150
Article / Letter to editor
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Radboud University Nijmegen Medical Centre
Antimicrobial Agents and Chemotherapy
SubjectUMCN 4.1: Microbial pathogenesis and host defense
The in vitro susceptibilities of 21 Aspergillus isolates were tested against three antifungal agents in RPMI 1640 and yeast nitrogen base at pH 5.0 and 7.0 by a broth microdilution format of the NCCLS method. The MICs of amphotericin B and itraconazole were higher, while those of flucytosine were lower, at pH 5.0 than at pH 7.0. The poor correlation between in vitro results and clinical outcome could be due to a difference in pH between the in vitro susceptibility test and at the site of infection.
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