Detection and Characterization of Two Phenotypes of Candida parapsilosis in South Korea: Clinical Features and Microbiological Findings

Autor: Jung-Hyun Byun, Eun Jeong Won, Hae Weon Cho, Daewon Kim, Hyukmin Lee, Soo Hyun Kim, Min Ji Choi, Seung A. Byun, Ga Yeong Lee, Seung-Jung Kee, Tae Yeul Kim, Mi-Na Kim, Jun Yong Choi, Dongeun Yong, Jong Hee Shin
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Microbiology Spectrum, Vol 11, Iss 3 (2023)
Druh dokumentu: article
ISSN: 2165-0497
DOI: 10.1128/spectrum.00066-23
Popis: ABSTRACT We newly detected two (sinking and floating) phenotypes of Candida parapsilosis among bloodstream infection (BSI) isolates from Korean hospitals and assessed their microbiological and clinical characteristics. During the performance of a Clinical and Laboratory Standards Institute (CLSI) broth microdilution antifungal susceptibility testing, the sinking phenotype had a characteristic smaller button-like appearance because all yeast cells sank to the bottoms of the CLSI U-shaped round-bottom wells, whereas the floating phenotype comprised dispersed cells. Phenotypic analysis, antifungal susceptibility testing, ERG11 sequencing, microsatellite genotyping, and clinical analysis were performed on C. parapsilosis isolates from 197 patients with BSI at a university hospital during 2006 to 2018. The sinking phenotype was detected in 86.7% (65/75) of the fluconazole-nonsusceptible (FNS) isolates, 92.9% (65/70) of the isolates harboring the Y132F ERG11 gene substitution, and 49.7% (98/197) of all isolates. Clonality was more frequently observed for the Y132F-sinking isolates (84.6% [55/65]) than for all other isolates (26.5% [35/132]; P
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