Effect of pH on the in vitro activities of amphotericin B, itraconazole, and flucytosine against Aspergillus isolates

DTA Te Dorsthorst, JW Mouton, CJP van den Beukel, HAL van der Lee, JFGM Meis, PE Verweij*

*Corresponding author for this work

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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.

Original languageEnglish
Pages (from-to)3147-3150
Number of pages4
JournalAntimicrobial Agents and Chemotherapy
Issue number8
Publication statusPublished - Aug-2004

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