First report of white piedra caused by Cutaneotrichosporon debeurmannianum.

Autor:	Almeida HL Jr; Universidade Católica de Pelotas, Programa de Pós-Graduação em Saúde e Comportamento, Pelotas, Rio Grande do Sul, Brazil., Faria EC; Universidade Católica de Pelotas, Programa de Pós-Graduação em Saúde e Comportamento, Pelotas, Rio Grande do Sul, Brazil., Assis TM; Universidade Católica de Pelotas, Programa de Pós-Graduação em Saúde e Comportamento, Pelotas, Rio Grande do Sul, Brazil., Leite IGC; Universidade de São Paulo, Faculdade de Medicina, Instituto de Medicina Tropical de São Paulo, Laboratório de Imunologia e Micologia (LIM-53), São Paulo, São Paulo, Brazil., Gimenes VMF; Universidade de São Paulo, Faculdade de Medicina, Instituto de Medicina Tropical de São Paulo, Laboratório de Imunologia e Micologia (LIM-53), São Paulo, São Paulo, Brazil.; Universidade de São Paulo, Faculdade de Odontologia, Programa de Pós-Graduação em Diagnóstico Oral, Radiologia Odontologica e Imaginologia,São Paulo, São Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Revista do Instituto de Medicina Tropical de Sao Paulo [Rev Inst Med Trop Sao Paulo] 2024 Oct 11; Vol. 66, pp. e60. Date of Electronic Publication: 2024 Oct 11 (Print Publication: 2024).
DOI:	10.1590/S1678-9946202466060
Abstrakt:	Piedras are small nodules found on the hair shafts. White piedra was initially described as caused by Trichosporon beigelii, which was later reclassified in several species. We describe the first case of white piedra caused by Cutaneotrichosporon debeurmannianum. Affected hairs were examined in natura with scanning electron microscopy, after gold metallization. The typical whitish cerebriform creamy colony was obtained in Sabouraud medium. Fungal genomic DNA extracted from cultures and locus was amplified with the NL1/NL4 primer pair from the D1/D2 region of the large ribosomal subunit (LSU) of 28S rRNA. With scanning electron microscopy, nodules are easily identified surrounding the hair shaft; with high magnifications, rounded structures adhered to each other were identified. Comparison of the nucleotide sequences of IMT-1703 Cutaneotrichosporon debeurmannianum revealed 99.6% similarity with the 28S large ribosomal unit rDNA sequence. This case of white piedra was caused by Cutaneotrichosporon debeurmannianum.
Databáze:	MEDLINE
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