Acquired Flucytosine Resistance during Combination Therapy with Caspofungin and Flucytosine for Candida glabrata Cystitis

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Charlier, Caroline | El Sissy, Carine | Bachelier-Bassi, Sophie | Scemla, Anne | Quesne, Gilles | Sitterlé, Emilie | Legendre, Christophe | Lortholary, Olivier | Bougnoux, Marie-Elisabeth

Edité par CCSD ; American Society for Microbiology -

International audience. Treatment of Candida glabrata cystitis remains a therapeutic challenge, and an antifungal combination using flucytosine is one option. We describe two patients with refractory C. glabrata cystitis who failed flucytosine combined with caspofungin with early-acquired high-level resistance to flucytosine due to nonsense mutations in the FUR1 gene. Rapidly acquired flucytosine resistance with microbiological failure should discourage combination of caspofungin and flucytosine during urinary candidiasis.

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