Articles Vol. 66 No. 1 07/01/2025

4. PROPORTION AND SPECIES COMPOSITION OF DERMATOPHYTES CAUSING TINEA PEDIS BY MORPHOLOGY AND MOLECULAR BIOLOGY IN SMALL BUSINESS OWNERS IN NGHE AN PROVINCE

Duong Thi Khanh Linh1,2, Le Tran Anh3,4, Tang Xuan Hai5,6
1 TTH Nghe An General Hospital
2 Bệnh viện TTH Nghệ An
3 Vietnam Military Medical Academy
4 Học viện Quân y
5 Nghe An Obstetrics and Pediatrics Hospital
6 Bệnh viện Sản Nhi Nghệ An
Corresponding author: Duonglinhna93@gmail.com
DOI: 10.52163/yhc.v66i1.1901
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Abstract

Objectives: The study aimed to determine the proportion and species composition of dermatophytes causing tinea pedis among small business owners in Nghe An province.

Methods: The experimental descriptive research method was employed with fungal culture in Saboraud Chromagar media with pH < 5.5 and antibiotics. The proportion and species composition was based on species identification keys, molecular biology and gene sequencing.

Results: Among 126 fungal samples, the proportion of yeasts was 74.6%, followed by filamentous fungi accounting for 25.4%. Morphological identification, PCR-RFLP and sequencing detected 11 genera with 24 species. The most common pathogenic yeasts accounted for 74.7%, of which Candida albicans shared the highest rate of 61.7% (58/94). The pathogenic filamentous fungi accounted for 25.4% (32/126), of which the highest rate was Asfergilus flavus 46% (18/32). Some rare pathogenic species were also detected, including Talaromyces pinophilus, Curvularia lunata, Penicillium polonicum, Trigonopsis variabilis...

Conclusions: 11 genera and 24 species of dermatophytes causing tinea pedis were identified.

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