R Arenas1, R Isa-Isa, A C Cruz. 1. Departamento de Dermatología, Hospital General Dr. Manuel Gea González, Tlalpan 4800, México DF-14000, México. rarenas98@hotmail.com
Abstract
BACKGROUND: Pityriasis versicolor is caused by Malassezia spp. It is a common world wide mycosis. Seven species are known of the Malassezia genus, and are identified in vitro by their morphological characteristics, biochemical tests and by molecular biology. OBJECTIVES: to determine clinical and epidemiological data of pityriasis versicolor as well as morphological aspects of Malassezia in vivo. METHODOLOGY: we performed a direct examination of the scales and classified the microscopic mycological elements as oval and orbicular spores, short and long hyphae. RESULTS: pityriasis versicolor mainly affected the thorax. Orbiculare yeasts and short hyphae frequently present. We could corroborate the wide morphological range of Malassezia spp. CONCLUSIONS: The morphological study of Malassezia spp. in vivo is not sufficient to determine the distribution of the various species.
BACKGROUND:Pityriasis versicolor is caused by Malassezia spp. It is a common world wide mycosis. Seven species are known of the Malassezia genus, and are identified in vitro by their morphological characteristics, biochemical tests and by molecular biology. OBJECTIVES: to determine clinical and epidemiological data of pityriasis versicolor as well as morphological aspects of Malassezia in vivo. METHODOLOGY: we performed a direct examination of the scales and classified the microscopic mycological elements as oval and orbicular spores, short and long hyphae. RESULTS:pityriasis versicolor mainly affected the thorax. Orbiculare yeasts and short hyphae frequently present. We could corroborate the wide morphological range of Malassezia spp. CONCLUSIONS: The morphological study of Malassezia spp. in vivo is not sufficient to determine the distribution of the various species.
Authors: Egberto Santos Carmo; Fillipe de Oliveira Pereira; Neuza Maria Cavalcante; Carla Wanderley Gayoso; Edeltrudes de Oliveira Lima Journal: An Bras Dermatol Date: 2013 May-Jun Impact factor: 1.896