Black piedra in Brazil. A contribution to its study in Manaus (state of Amazonas)

Fischman, Olga

doi:10.1007/bf02049624

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…Black piedra occurs more frequently in tropical countries and affects mainly the hair of the scalp. 7,8 Beigel was the first to describe WP, when in 1865 he discovered the nodules on the hairs of a wig. 9 All cases of WP historically were reported to be caused by T beigelii.…”

Section: Discussionmentioning

confidence: 97%

White piedra in children

Kiken

Sekaran

Antaya

et al. 2006

Journal of the American Academy of Dermatology

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Section: Discussionmentioning

confidence: 97%

White piedra in children

Kiken

Sekaran

Antaya

et al. 2006

Journal of the American Academy of Dermatology

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“…Concomitant hair infection by Trichosporon spp. and corynebacteria has been demonstrated by electron microscopy and histochemical evaluation of concretions, and it is still unclear whether the proteolytic capabilities of the coryneform bacteria may be relevant for the establishment of fungal infection (53,54,65,67,92,96,177,197).…”

Section: Superficial Infectionsmentioning

confidence: 99%

Current Knowledge of Trichosporon spp. and Trichosporonosis

2011

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SUMMARY Trichosporon spp. are basidiomycetous yeast-like fungi found widely in nature. Clinical isolates are generally related to superficial infections. However, this fungus has been recognized as an opportunistic agent of invasive infections, mostly in cancer patients and those exposed to invasive medical procedures. It is possible that the ability of Trichosporon strains to form biofilms on implanted devices, the presence of glucuronoxylomannan in their cell walls, and the ability to produce proteases and lipases are all factors likely related to the virulence of this genus and therefore may account for the progress of invasive trichosporonosis. Disseminated trichosporonosis has been increasingly reported worldwide and represents a challenge for both diagnosis and species identification. Phenotypic identification methods are useful for Trichosporon sp. screening, but only molecular methods, such as IGS region sequencing, allow the complete identification of Trichosporon isolates at the species level. Methods for the diagnosis of invasive trichosporonosis include PCR-based methods, Luminex xMAP technology, and, more recently, proteomics. Treating patients with trichosporonosis remains a challenge because of limited data on the in vitro and in vivo activities of antifungal drugs against clinically relevant species of the genus. Despite the mentioned limitations, the use of antifungal regimens containing triazoles appears to be the best therapeutic approach.

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“…Hay varios estudios en Brasil que señalan esta región como área endémica de piedra negra. En un estudio en Manaos, Brasil 103 , se encontró afectación de 7,9 % de la población; en otro, de 120 muestras de pelo de indios brasileros habitantes de un área rural, en 98 (82 %) se cultivó Piedraia hortae 104 ; y en otro, se encontró piedra negra en 74 (56,9 %) de 130 integrantes de una tribu indígena amazónica, zoró 105 , sin que se encontraran diferencias significativas en la tasa de infección por sexo 7 .…”

Section: Epidemiologíaunclassified

Micosis superficiales

Acosta¹,

Cardona²

2014

rev. asoc. colomb. dermatol. cir. dematol.

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Las micosis superficiales son infecciones fúngicas que comprometen el estrato córneo, las estructuras anexiales o ambos, sin invadir más profundamente. Incluyen la pitiriasis versicolor, la dermatitis seborreica, la tinea nigra, la piedra blanca y la piedra negra. Producen lesiones clínicas variadas según el sitio afectado y el agente causal. Generalmente, producen poca o ninguna reacción inmunitaria; por lo tanto, su tratamiento usualmente incluye medidas y medicamentos tópicos, y solo en casos muy graves o resistentes, requieren fármacos sistémicos.

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Black piedra in Brazil. A contribution to its study in Manaus (state of Amazonas)

Cited by 9 publications

References 5 publications

White piedra in children

White piedra in children

Current Knowledge of Trichosporon spp. and Trichosporonosis

Micosis superficiales

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