Synonym(s)
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.
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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.
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.
- Gip L (1994) Black piedra: the first case treated with terbinafine (Lamisil). Br J Dermatol 130: 26-28
- Gip L (1993) Terbinafine for black piedra. Lancet 341: 1164
- Gupta AK et al (2003) Tinea corporis, tinea cruris, tinea nigra, and piedra. Dermatol Clin 21: 395-400
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.
Incoming links (6)
Black fungus; Dermatomycoses; Hair nodules; Mould diseases; Piedrs nigra; Trichomycosis nodosa nigra;Outgoing links (1)
Piedra, white;Disclaimer
Please ask your physician for a reliable diagnosis. This website is only meant as a reference.