Sobre os cogumelos da piedra brazileira

Fonseca, O. da; Leão, A. E. de Arêa

doi:10.1590/s0074-02761928000600002

Cited by 14 publications

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“…In 1911, Horta clearly differentiated black piedra from the white variety and considered that the fungus causing the first was a species of Trichosporon [1]; later it was named Trichosporon hortai [2]. When ascospores were discovered in the nodules, the fungus was related to the Ascomycotina and given its present name [3]. The infection is normally distributed in tropical climates [4][5][6][7][8][9] although it has occasionally been reported in other parts of the world [10].…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural aspects of hair digestion in black piedra infection

Figueras¹,

Guarro²,

Zaror³

1997

Med Mycol

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The ultrastructural pattern of human hair infection by Piedraia hortae in vivo has been studied. The fungus destroyed the cuticular layers of the hair and was able to penetrate deeply into the cortex. The course of destruction of human hair is described and compared with that produced by other fungi. Two well-defined types of cortex digestion were characterized. The slow rate of keratin degradation at the cortex together with the compacted stromatic organization of the nodules are argued as the main reasons that guarantee the long survival of the fungus, and therefore the chronic course of the disease. The data provided in this paper may help to understand the mechanisms that regulate the pathogenicity of this fungus.

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