The first case of tinea nigra on wrist caused by Hortaea werneckii in Chinese Mainland and literature review

Abstract

Abstract:

Objective We present the case of tinea nigra on the left wrist caused by Hortaea werneckii (H. werneckii) and review the literature in Chinese Mainland to summary the clinical characteristics of the disease. Method A 39-year-old man was presented with a dark brown asymptomatic plaque on the flexion side of his left wrist for 1 years. Diagnosis was based on mycology and molecular identification. Result A round black colony with flocculent surface grew at the SDA medium after 1 week. The microscopic examination revealed rich, round, oval, brown and septate spores which gathered on both sides and the top of the thickwalled septate hyphae. The result of gene sequencing was H.werneckii. The patient was treated with miconazole bifonazole cream for 2 weeks and cured completely. Conclusion The main clinical location of tinea nigra was the palm. This case is the first of tinea nigra on wrist by H.werneckii in Chinese Mainland. The characteristic morphological features of colony could been observed in microscopic examination and the specie could be identified furtherly by gene sequencing.

Key words: tinea nigra, Hortaea werneckii, literature review

CLC Number:

R519.8

JI Mei, SHEN Xue-hua, TAN Jing-wen, GAO Zhi-qin, YANG Lian-juan. The first case of tinea nigra on wrist caused by Hortaea werneckii in Chinese Mainland and literature review[J]. Chinese Journal of Mycology, 2020, 15(4): 193-196,222.

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