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- Document 0032
- DOCN M9620032
- TI In vitro evaluation of combination of fluconazole and flucytosine
- against Cryptococcus neoformans var. neoformans.
- DT 9602
- AU Nguyen MH; Barchiesi F; McGough DA; Yu VL; Rinaldi MG; Department of
- Medicine, University of Pittsburgh Medical Center,; Pennsylvania 15213,
- USA.
- SO Antimicrob Agents Chemother. 1995 Aug;39(8):1691-5. Unique Identifier :
- AIDSLINE MED/96100733
- AB Amphotericin B and fluconazole are current acceptable therapies for
- cryptococcal meningitis; however, their effect remains suboptimal. The
- combination of fluconazole and flucytosine has yielded encouraging
- clinical results in human immunodeficiency virus patients with
- cryptococcal meningitis. To investigate the biological basis of this
- finding, we performed in vitro combination testing of fluconazole and
- flucytosine against 50 clinical strains of Cryptococcus neoformans var.
- neoformans. Synergy (fractional inhibitory concentration index of < 1.0)
- was observed in 62% of cases, while antagonism (fractional inhibitory
- concentration index of > 2.0) was not observed. For cases in which
- synergy was not achieved (autonomous or additive effects), the
- beneficial effect of the combination was still seen (i.e., there was
- still a decrease, although not as dramatic, in the MIC of one or both
- drugs when used in combination). The in vitro inhibitory action of
- flucytosine was greatly enhanced by the addition of fluconazole; the
- flucytosine MICs for Cryptococcus isolates were markedly decreased to
- concentrations which were severalfold lower than the achievable
- cerebrospinal fluid flucytosine concentration. On the other hand, the
- addition of flucytosine did not greatly enhance the in vitro activity of
- fluconazole if the initial fluconazole MIC for the isolate was > or = 8
- micrograms/ml. Controlled clinical studies are warranted to further
- elucidate the potential utility of fluconazole-flucytosine combination
- therapy.
- DE Antifungal Agents/*PHARMACOLOGY Cryptococcus neoformans/*DRUG EFFECTS
- Drug Combinations Drug Synergism Fluconazole/*PHARMACOLOGY
- Flucytosine/*PHARMACOLOGY Microbial Sensitivity Tests Support,
- Non-U.S. Gov't JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-