Piedra
Piedra
Definition
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, mustache and genital areas and is caused by Trichosporon species.
Also known as hair shaft fungal infectious disease — per MONDO