Piedraia hortae is a superficial fungus that exists in the soils of tropical and subtropical environments and affects both sexes of all ages. [2] . The fungus grows very slowly, forming dark hyphae, which contain chlamydoconidia cells and black colonies when grown on agar.

Piedra is a fungal infection of the hair, characterised by the deposition of small black or white nodules along the hair shaft. These look like small stones, hence the name piedra, meaning ‘stone’ in Spanish. Piedra is also known as Trichomycosis nodosa or Trichomycosis nodularis.

Feb 7, 2025 · White piedra is a rare superficial fungal infection of the hair shaft that requires medical treatment. Learn more about its symptoms and appearance here.

Piedra refers to colonization of the hair shaft that results in firm, irregular nodules. If the nodule is dark, the infection is black piedra and is due to Piedraia hortae fungus. If the nodule is white, the infection is White Piedra and is due to Trichosporon beigelii.

Jan 24, 2023 · Piedra, the Spanish word for "stone," is a descriptive name for fungal infections that cause small, stone-like concretions on hair. Piedra is divided into two subtypes: white piedra and black piedra.

Mar 13, 2019 · White piedra is caused by fungi of the genus Trichosporon. T inkin and T ovoides are the species most likely to be found on pubic hair and scalp hair, respectively. Patients who have white piedra of the pubic hair are likely to have simultaneous pubic hair infection with coryneform bacteria.

Dec 7, 2023 · White piedra is a fungal infection that affects the hair shafts and follicles. It is caused by various species of fungi, including Trichosporon and Phaeoisaria. The infection primarily targets the scalp and can also affect other areas of the body with hair, such as the beard and pubic region.

Feb 13, 2023 · Piedra is a superficial fungal infection of hair shafts, which presents with small nodules stuck-on to the shaft. Black piedra, caused by Piedraia hortae, is characterized by black-colored nodules and is common in the tropics, especially in …

Apr 26, 2023 · Piedra, which means "stone" in Spanish, is an asymptomatic superficial fungal infection of the hair shaft. In 1911, Horta classified piedra into two types. The first is black piedra, which is...

Piedra is an asymptomatic fungal infection of the hair shaft caused by Piedraia hortae (black piedra) or various Trichosporon species (formerly known as Trichosporon beigelii; white piedra). The species that most commonly cause white piedra are Trichosporon inkin, Trichosporon cutaneum and Trichosporon ovoides.75,76.