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Antimicrobial Agents and Chemotherapy, 03 1997, 575-577, Vol 41, No. 3
M Ruhnke, A Schmidt-Westhausen and M Trautmann
The susceptibility of Candida albicans to a new antifungal triazole,
voriconazole (UK-109,496), was investigated in 105 isolates obtained from
the oral cavities of patients with human immunodeficiency virus (HIV)
infection to study this drug's activity against fluconazole- susceptible
and -resistant isolates. MICs were determined by a broth microdilution
technique according to document M27-T from the National Committee for
Clinical Laboratory Standards and by using a broth microdilution technique
and a synthetic high-resolution medium. These antifungal susceptibility
testing methods showed high levels of agreement (93% for fluconazole and
86% for voriconazole). Data from in vitro studies showed that voriconazole
has good activity against fluconazole-susceptible and -resistant C.
albicans isolates; the MICs at which 90% of all isolates were inhibited
were 0.19 to 0.39 microgram/ml. We found that for isolates for which
fluconazole MICs were high, voriconazole MICs were proportionally higher
than those for fluconazole-susceptible C.albicans (P < 0.001).
Pretreatment isolates from six patients with fluconazole-refractory
esophageal candidiasis were included in the study. For these isolates the
MICs were < or = 0.39 microgram/ml, and all patients responded to
voriconazole. These results suggest that voriconazole is effective even in
the treatment of fluconazole-refractory esophageal candidiasis and should
be studied further to determine its clinical relevance in patients with HIV
infection.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
In vitro activities of voriconazole (UK-109,496) against fluconazole- susceptible and -resistant Candida albicans isolates from oral cavities of patients with human immunodeficiency virus infection
Abteilung Innere Medizin und Poliklinik, Virchow-Klinikum der Humboldt- Universitat, Berlin, Germany. mruhnke@ukrv.de
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