Journal
MYCOPATHOLOGIA
Volume 188, Issue 5, Pages 537-544Publisher
SPRINGER
DOI: 10.1007/s11046-022-00689-8
Keywords
Trichophyton tonsurans; Tinea capitis; Outbreak; Multilocus genotyping
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An outbreak of tinea capitis caused by Trichophyton tonsurans was reported among five juvenile athletes in a wrestling team in Beijing, China. The fungal pathogens were identified as T. tonsurans by morphology and sequencing. Multilocus genotyping analysis revealed a single genotype among the five isolates. Antifungal susceptibility testing showed that these isolates were susceptible to common antifungal drugs for treating tinea capitis.
Trichophyton tonsurans mostly causes tinea capitis and tinea corporis and often associates with outbreaks among combat sports athletes. Here, we report an outbreak of tinea capitis caused by T. tonsurans among five juvenile athletes in a wrestling team in Beijing, China. Scrapings from the lesions of the five patients were performed by direct microscopic examination and fungal culture. The fungal pathogens were all identified as T. tonsurans by morphology and sequencing of the internal transcribed spacer (ITS) regions. Multilocus genotyping analysis was performed by sequencing of 13 gene loci. The sequences of these markers were identical among the five isolates, revealing a single genotype. Antifungal susceptibilities of terbinafine, itraconazole, fluconazole, ketoconazole, and amphotericin B against T. tonsurans was determined by broth microdilution method according to the Clinical and Laboratory Standards Institute M38-A3 document and these isolates were all susceptible to the common antifungal drugs treating tinea capitis.
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