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Updated: Aug 11, 2026

Infecting Mice with Malassezia spp. to Study the Fungus-Host Interaction
Published on: November 6, 2019
[Pityriasis versicolor in Santo Domingo, Dominican Republic. In vivo morphological data of Malasezzia spp. in 100
R Arenas1, R Isa-Isa, A C Cruz
1Departamento de Dermatología, Hospital General Dr. Manuel Gea González, Tlalpan 4800, México DF-14000, México. rarenas98@hotmail.com
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.
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