A total of 719 cases of dermatophytoses was studied in the Division of Dermatology, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand, during January to December 1986. Infection caused by fungus comprises 12%, while the incidence of dermatophytoses was 5.5% of skin disorders. The age group commonly infected was 12-21 years old (mean age of 18 years); 40% was female and 47.5% was male. In the female patients the common prevalent infections were tinea corporis 29%, tinea cruris 23%, tinea pedis 16%, while in male patients it was 28%, 39% and 14% respectively. Only 4 species of dermatophytes were isolated. The prevailing ones were: Trichophyton rubrum 66%, T. mentagrophytes 15%, Epidermophyton floccorum 13% and Microsporum gypseum 6%.

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