Piedra, blackB36.3

Author:Prof. Dr. med. Peter Altmeyer

All authors of this article

Last updated on: 29.10.2020

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Synonym(s)

black piedra; piedra nigra; trichomycosis nodosa nigra

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HistoryThis section has been translated automatically.

Horta, 1911

DefinitionThis section has been translated automatically.

Variation of the white piedra by the halophilic, yeast-like fungus Piedraia hortae. The fungus, an ascomycet, was used in some black strains to dye hair.

PathogenThis section has been translated automatically.

Piedraia hortae (black fungus), which lives on plants and optionally on monkey and human hairs in humid warm areas.

Occurrence/EpidemiologyThis section has been translated automatically.

Mainly tropics, South America, Far East.

Clinical featuresThis section has been translated automatically.

Hard, brown-black, spindle-shaped nodules visible to the naked eye, mostly occurring in plural, which are firmly attached to the hair shaft. These consist of hyphae connected by a cement-like substance.

Differential diagnosisThis section has been translated automatically.

  • trichorrhexis nodosa
  • Trichobacteriosis

TherapyThis section has been translated automatically.

According to the white piedra. Cutting and shaving the affected hair. Imidazole containing cream for 7 days.

LiteratureThis section has been translated automatically.

  1. Gip L (1994) Black piedra: the first case treated with terbinafine (Lamisil). Br J Dermatol 130: 26-28
  2. Gip L (1993) Terbinafine for black piedra. Lancet 341: 1164
  3. Gupta AK et al (2003) Tinea corporis, tinea cruris, tinea nigra, and piedra. Dermatol Clin 21: 395-400

  4. Veasey JV et al (2017) White piedra, black piedra, tinea versicolor, and tinea nigra: contribution tothe
    diagnosis of superficial mycosis. To Bras Dermatol 92:413-416.

Authors

Last updated on: 29.10.2020

Author: Prof. Dr. med. Peter Altmeyer