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Loss of in vitro resistance in Candida glabrata following discontinuation of fluconazole prophylaxis in a hematopoietic stem cell transplantation patient.

ABSTRACT: We report a case of fluconazole-resistant oropharyngeal colonization caused by a strain of Candida glabrata that rapidly regained susceptibility once prophylaxis with this agent was discontinued and echinocandin therapy was initiated. Isolates collected before and after discontinuation of fluconazole were confirmed to be isogenic by RAPD analysis. Transcription analysis demonstrated constitutive expression of genes encoding efflux pumps in the isolate recovered on fluconazole prophylaxis and transient expression in those isolates collected after fluconazole was discontinued.

SUBMITTER: Westbrook SD 

PROVIDER: S-EPMC2856480 | biostudies-literature | 2010 May

REPOSITORIES: biostudies-literature

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Loss of in vitro resistance in Candida glabrata following discontinuation of fluconazole prophylaxis in a hematopoietic stem cell transplantation patient.

Westbrook Steven D SD   Wiederhold Nathan P NP   Vallor Ana C AC   Kotara Susann S   Bernardo Stella S   Lee Samuel A SA   Kirkpatrick William R WR   Toro Juan J JJ   Freytes Cesaro C   Patterson Thomas F TF   Redding Spencer W SW  

Medical mycology 20100501 3

We report a case of fluconazole-resistant oropharyngeal colonization caused by a strain of Candida glabrata that rapidly regained susceptibility once prophylaxis with this agent was discontinued and echinocandin therapy was initiated. Isolates collected before and after discontinuation of fluconazole were confirmed to be isogenic by RAPD analysis. Transcription analysis demonstrated constitutive expression of genes encoding efflux pumps in the isolate recovered on fluconazole prophylaxis and tra  ...[more]