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Antimicrob Agents Chemother ; 46(5): 1325-8, 2002 May.
Article in English | MEDLINE | ID: mdl-11959563

ABSTRACT

It is not uncommon to see amphotericin B treatment failure in patients with systemic infection caused by Candida lusitaniae. We report a patient with stage IV ovarian carcinoma and C. lusitaniae sepsis whose treatment with amphotericin B failed. The initial blood isolate was susceptible to amphotericin B in vitro; however, the MIC for a blood isolate recovered 7 weeks after treatment began showed a fourfold increase. Direct subculture of two positive blood samples obtained within a week of the patient's death showed the coexistence of two distinct colony color variants on CHROMagar Candida (CAC). One variant was susceptible to amphotericin B, and one was resistant. These results emphasize the importance of repeat amphotericin B susceptibility testing for patients with persistent C. lusitaniae infection. The presence of colony variants on CAC may signal the emergence of amphotericin B resistance in C. lusitaniae and should be investigated.


Subject(s)
Amphotericin B/pharmacology , Antifungal Agents/pharmacology , Candida/drug effects , Candida/growth & development , Drug Resistance, Fungal , Aged , Amphotericin B/therapeutic use , Antifungal Agents/therapeutic use , Blood/microbiology , Candida/classification , Candidiasis/drug therapy , Candidiasis/microbiology , Chromogenic Compounds/metabolism , Culture Media , Electrophoresis, Gel, Pulsed-Field , Fatal Outcome , Female , Fungemia/drug therapy , Fungemia/microbiology , Humans , Microbial Sensitivity Tests , Treatment Failure
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