First Fungemia Case Due to Environmental Yeast Wickerhamomyces Myanmarensis : Detection by Multiplex qPCR and Antifungal Susceptibility

AIM: Presenting the first clinical case of Wickerhamomyces myanmarensis. PATIENTS & METHODS: Yeast cells were isolated from blood and central venous catheter of a 5.5-year-old male subject. API 20C AUX, MALDI-TOF MS, ITS and LSU rDNA sequencing, and our qPCR assay were used for identification and the MIC values were determined by CLSI M27-A3. RESULTS: ITS and LSU rDNA sequencing identified both isolates as W. myanmarensis, while API 20C AUX and MALDI-TOF MS did not identify them correctly. Our qPCR specifically distinguished W. myanmarensis from W. anomalus. Isolate obtained from blood showed a higher MIC value for fluconazole, voriconazole and posaconazole. CONCLUSION: Utilization of reliable identification tools might reveal the genuine spectrum of opportunistic yeast species.