Either of two diseases resulting from fungal infection of the hair shafts. Black piedra occurs mainly in and on the hairs of the scalp and is caused by piedraia hortae; white piedra occurs in and on the hairs of the scalp, beard, moustache and genital areas and is caused by trichosporon beigelii.
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... belongs to the family Cryptococcaceae. This species was formerly known as Trichosporon cutaneum, as it is the etiologic agent of "white piedra," a mild superficial infection of head and pubic hair shafts, most often seen in tropical climates and rarely in temperate areas (1,2). ...
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