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. 2002 Apr;40(4):1363-7.
doi: 10.1128/JCM.40.4.1363-1367.2002.

New yeast species, Malassezia dermatis, isolated from patients with atopic dermatitis

Takashi Sugita  1 , Masako Takashima, Takako Shinoda, Hajime Suto, Tetsushi Unno, Ryoji Tsuboi, Hideoki Ogawa, Akemi Nishikawa
Affiliations

New yeast species, Malassezia dermatis, isolated from patients with atopic dermatitis

Takashi Sugita et al. J Clin Microbiol. 2002 Apr.

Abstract

Malassezia species are considered to be one of the exacerbating factors in atopic dermatitis (AD). During examination of the cutaneous colonization of Malassezia species in AD patients, we found a new species on the surface of the patients' skin. Analysis of ribosomal DNA sequences suggested that the isolates belonged to the genus MALASSEZIA: They did not grow in Sabouraud dextrose agar but utilized specific concentrations of Tween 20, 40, 60, and 80 as a lipid source. Thus, we concluded that our isolates were new members of the genus Malassezia and propose the name Malassezia dermatis sp. nov. for these isolates.

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Figures

FIG. 1.
FIG. 1.
Molecular phylogenetic trees constructed using the sequences of D1 and D2 26S rDNA of M. dermatis sp. nov. and related Ustilaginomycetes species (A) and the ITS1 region of M. dermatis sp. nov. and other member of the genus Malassezia (B). DDBJ/GenBank accession numbers are indicated in parentheses. The numerals represent the confidence levels from 100 replicate bootstrap samplings (frequencies of less than 50% are not indicated). T, type strain. Knuc, Kimura's parameter (10).
FIG. 1.
FIG. 1.
Molecular phylogenetic trees constructed using the sequences of D1 and D2 26S rDNA of M. dermatis sp. nov. and related Ustilaginomycetes species (A) and the ITS1 region of M. dermatis sp. nov. and other member of the genus Malassezia (B). DDBJ/GenBank accession numbers are indicated in parentheses. The numerals represent the confidence levels from 100 replicate bootstrap samplings (frequencies of less than 50% are not indicated). T, type strain. Knuc, Kimura's parameter (10).
FIG. 2.
FIG. 2.
Vegetative cells of M. dermatis M 9927 (JCM 11348) grown in LNA for 7 days at 32°C. Bar, 10 μm.
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References

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