Trichophyton tonsurans Infection Diagnosed with Culture from a Hair Clipper: A Case Report

SHINODA Hidekazu, SEKIYAMA Hanako, NISHIMOTO Katsutaro

doi:10.2336/nishinihonhifu.73.166

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Other Title

バリカンより菌を分離し確定診断に至ったＴｒｉｃｈｏｐｈｙｔｏｎ　ｔｏｎｓｕｒａｎｓ感染症の１例
症例バリカンより菌を分離し確定診断に至ったTrichophyton tonsurans感染症の1例
ショウレイバリカンヨリキンオブンリシカクテイシンダンニイタッタ Trichophyton tonsurans カンセンショウノ 1レイ

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Abstract

A fourteen-year-old male judo club member complaining of pruritus in his frontal and right temporal areas presented to a clinic other than ours where he was prescribed topical steroids, which he used for approximately 20 days. His pruritic erythema continued to worsen, and the patient was re-diagnosed with tinea capitis and his prescription changed to terbinafine hydrochloride. After another one week during which hair loss, erythema and swelling worsened in the affected area, oral itraconazole and topical antifungals were added to his regimen, but, because the hair loss and erythema showed no improvement, the patient came to our clinic. Our examination showed a swollen erythrogenic 3-cm area of hair loss with pustula and a number of black dots inside. We found endothrix parasitic fungi upon KOH examination of the black dot-like hair, but Sabouraud agar cultures were negative. However, we also cultured samples collected from the patient's private hair clipper, which he had used until just before his consultation at the previous clinic, and isolated Trichophyton tonsurans from these cultures. This patient's tinea capitis had worsened due to misdiagnosis and treatment with steroids and topical antifungals. Finally, at a closer inspection of the clinical course of this case, we concluded that a contribution of terbinafine hydrochloride to the aggravation of the infection also could not be excluded.

Journal

Nishi Nihon Hifuka

Nishi Nihon Hifuka 73 (2), 166-169, 2011

Western Division of Japanese Dermatological Association

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