Journal
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
Volume 83, Issue 4, Pages 293-303Publisher
SPRINGER
DOI: 10.1023/A:1023373329502
Keywords
black yeasts; Exophiala; ITS rDNA sequencing; m-13 fingerprint; neurotropism; oligotrophic fungi; Sarcinomyces; taxonomy
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Analysis of ITS rDNA of the black yeast Exophiala dermatitidis revealed a close phylogenetic relationship to the meristematic fungus Sarcinomyces phaeomuriformis. As most strains of S. phaeomuriformis have a yeast-like phenotype corresponding to the anamorph genus Exophiala, a new combination in Exophiala is proposed. On the basis of ITS sequence, M-13 fingerprint and SSU intron data, two main entities could be distinguished within E. dermatitidis. One of these (B) contained prevalently strains from environmental sources, while the other (A) mainly comprised strains from clinical sources. This may be due to a difference in virulence. All strains from severe brain and disseminated infections in East Asia clustered in group A. However, strains of group A caused a relatively mild fungemia in patients outside East Asia.
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