Piedra
Piedra is a hair disease caused by a fungus.[1]
Types include:
Gallery
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Under a relatively-low magnification of 100X, this photomicrograph reveals some of the pathologic morphology displayed by a primate hair shaft indicative of the disease known as, “black piedra”, also known as “trichosporosis”, which is caused by the fungal organism, Piedraia hortae. From Public Health Image Library (PHIL). [2]
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This is a photomicrograph of a hair shaft with a condition called “black piedra” due to Piedraia hortae. From Public Health Image Library (PHIL). [2]
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This is a photomicrograph of the mycelium of the fungus Piedraia hortae, magnified 475X. From Public Health Image Library (PHIL). [2]
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This is a plate culture of Piedraia hortae, strain A272. From Public Health Image Library (PHIL). [2]
References
© 2026 MyEClinic – IFTM Institut für Telematik in der Medizin GmbH

![Under a relatively-low magnification of 100X, this photomicrograph reveals some of the pathologic morphology displayed by a primate hair shaft indicative of the disease known as, “black piedra”, also known as “trichosporosis”, which is caused by the fungal organism, Piedraia hortae. From Public Health Image Library (PHIL). [2]](https://www.wikidoc.org/images/2/2e/Black_piedra01.jpeg)
![This is a photomicrograph of a hair shaft with a condition called “black piedra” due to Piedraia hortae. From Public Health Image Library (PHIL). [2]](https://www.wikidoc.org/images/4/47/Black_piedra03.jpeg)
![This is a photomicrograph of the mycelium of the fungus Piedraia hortae, magnified 475X. From Public Health Image Library (PHIL). [2]](https://www.wikidoc.org/images/4/43/Black_piedra04.jpeg)
![This is a plate culture of Piedraia hortae, strain A272. From Public Health Image Library (PHIL). [2]](https://www.wikidoc.org/images/9/9a/Black_piedra05.jpeg)