The same dermatophyte is isolated from plucked hairs, skin scrapings, and nails of an older patient.The most likely identification is

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The dermatophytes, including the genera Trichophyton, Microsporum, and Epidermophyton break down and utilize keratin as a source of nitrogen. The genus Trichophyton is capable of invading the hair, skin, and nails, whereas the genus Microsporum involves only the hair and skin; the genus Epidermophyton involves the skin and nails.

The Same Dermatophyte Is Isolated from Plucked Hairs, Skin Scrapings