The genus Malassezia with description of four new species

  title={The genus Malassezia with description of four new species},
  author={Eveline Gu{\'e}ho and Gillian Midgley and Jacques Guillot},
  journal={Antonie van Leeuwenhoek},
The genus Malassezia has been revised using morphology, ultrastructure, physiology and molecular biology. As a result the genus has been enlarged to include seven species comprising the three former taxa M. furfur, M. pachydermatis and M. sympodialis, and four new taxa M. globosa, M. obtusa, M. restricta and M. slooffiae. The descriptions of all the species include morphology of the colonies and of the cells, together with ultrastructural details. The physiological properties studied were the… 
Infections by malassezia: new approachs
The taxonomical changes observed for the Malassezia species has led to the reassessment of the laboratory methodologies which were formerly used for the identification of the etiologic agent.
Twonew lipid-dependentMalassezia species fromdomestic animals
During a study on the occurrence of lipid-dependent Malassezia spp. in domestic animals, some atypical strains, phylogenetically related to Malassezia sympodialis Simmons et Guého, were shown to
Classification of Yeasts of the Genus Malassezia by Sequencing of the ITS and D1/D2 Regions of DNA
The recent development of molecular techniques has improved the classification of this genus, allowing a more accurate differentiation among different species, and descriptions of new species should be done in a standardized manner, including phenotypic and molecular features.
Two new lipid-dependent Malassezia species from domestic animals.
The validation of these new taxa is further supported by analysis of the D1/D2 regions of the 26S rRNA gene, the ITS1-5.8S-ITS2 rRNA, the RNA polymerase subunit 1 and chitin synthase nucleotide sequences, and the amplified fragment length polymorphism patterns, which were all consistent in separating these new species from the other species of the genus, and those of the M. sympodialis species cluster.
Malassezia cuniculi sp. nov., a novel yeast species isolated from rabbit skin.
Members of the genus Malassezia have rarely been associated with lagomorphs. During the course of an investigation of the lipophilic mycobiota of rabbit skin, two lipid-dependent isolates which could
Biodiversity, phylogeny and ultrastructure.
The phylogeny, based on sequencing of the D1/D2 variable domains of the ribosomal DNA and the ITS regions, confirmed the basidiomycetous nature of these yeasts, which occupy an isolated position among the UstilaginomycETes.
Phylogenetic relationships of Malassezia species based on multilocus sequence analysis.
The phylogenetic study of the partial β-tubulin gene sequences indicated that this molecular marker can be used to assess diversity and identify new species and could help to estimate divergence times for the origin and diversification of Malassezia species.
Malassezia nana sp. nov., a novel lipid-dependent yeast species isolated from animals.
Five isolates of a novel species of the yeast genus Malassezia were isolated from animals in Japan and Brazil and showed that they were conspecific and belonged to the genus Malasseszia, which resembles M. dermatis and M. sympodialis, but can be distinguished from these species by its inability to use Cremophor EL as the sole lipid source and to hydrolyse aesculin.
Physiological and Molecular Characterization of Atypical Isolates of Malassezia furfur
Seven Malassezia species strains that have a different Tween assimilation pattern from the one typically used to differentiate M. furfur, M. sympodialis, and M. slooffiae are isolated; the atypical assimilation of Tween 80 was found to be a new physiological pattern characteristic of some strains isolated in Colombia.


Morphological Variation in Malassezia and its Significance in Pityriasis Versicolor
Morphological variation among yeasts of the genus Malassezia has been recognized since their earliest descriptions and it is proposed to designate them as two separate species, M.f urfur and M. ovalis.
A reevaluation of the genus Malassezia by means of genome comparison
Results of a study of the genus Malassezia on the basis of genome characters confirm that two species should be maintained, M. furfur and M. pachydermatis. The two forms associated with skin disease,
Polymorphism of Malassezia furfur.
Results suggest that P. orbiculare and P. ovale are stages in the complex developmental cycle of a single species (Malassezia furfur), but the three names should be preserved until the life cycle is more fully understood.
The diversity of Pityrosporum (Malassezia) yeasts in vivo and in vitro
In vivo both spherical and oval yeasts may be found in normal conditions on the skin and also associated with hyphae in scales from pityriasis versicolor, there is however generally a different distribution pattern on the body for two forms, which may indicate a different ecology for two distinct varieties.
The diversity ofMalassezia yeasts confirmed by rRNA sequence and nuclear DNA comparisons
The usefulness of sequencing for both taxonomic and epidemiological purposes is demonstrated, with Malassezia yeasts maintained as the unique taxon M. pachydermatis and lipid-dependent strains shown to be distributed among seven species.
Electron microscopy of Malassezia furfur in tinea versicolor.
This electron microscope investigation of Malassezia furfur (parasitic phase) is basic information for taxonomic purposes. Skin was excised from lesions of tinea versicolor, fixed in paraformaldehyde
Characterization of markedly lipid-dependent Malassezia pachydermatis isolates from healthy dogs.
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The finely laminar ultrastructure of the cell walls of Malassezia spp.
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The yeast Pityrosporum ovale, a skin saprophyte, will only grow if fatty acids of chain length greater than C(10) are added to the culture medium. 9-Hydroxypalmitic acid is the major product of