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Chemotherapy. 1981;27(4):247-51.

Combined action of amphotericin B and 5-fluorocytosine on pathogenic yeasts susceptible to either drug alone.

Abstract

Amphotericin B (AMB)-5-fluorocytosine (5-FC) synergism has generally been observed in yeasts displaying 5-FC resistance. The present study was designed to assess activity of these drugs on yeasts showing susceptibility to 5-FC as well as AMB. Selected strains were incubated in a synthetic liquid medium with the test agents and viability or 14C-5-FC uptake was determined. Combinations of AMB and 5-FC continued to be inhibitory during the period that cultures treated with either drug alone were recovering from transient inhibition. In this sense, AMB + 5-FC exerted greater antifungal activity than either drug alone. However, combined activity did not involve AMB stimulation of 5-FC uptake by the organism. Results were indicative of sequential drug action.

PMID:
7195793
DOI:
10.1159/000237987
[Indexed for MEDLINE]

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