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Malassezia pachydermatis
''Malassezia pachydermatis'' is a zoophilic yeast in the division Basidiomycota. It was first isolated in 1925 by Fred Weidman, and has been named ''pachydermatis'' Greek for "thick-skin" after the original sample taken from an Indian rhinoceros (''Rhinocerosus unicornis'') with severe exfoliative dermatis.〔 Within the genus ''Malassezia'', ''M. pachydermatis'' is most closely related to the species ''M. furfur''.〔 A commensal fungus, it can be found within the microflora of healthy mammals such as humans, cats and dogs,〔〔 However, it is capable of acting as an opportunistic pathogen under special circumstances and has been seen to cause skin and ear infections, most often occurring in canines.〔〔
==Description==
''Malassezia pachydermatis'' is a bottle-shaped,〔 non-lipid dependent lipophilic yeast in the genus ''Malassezia''.〔 Colonies are cream or yellowish in colour, smooth to wrinkled and convex with a margin possessing a slightly lobed appearance.〔〔 Cells are ovoidal in shape and range in size from 3.0–6.5 x 2.5 μm.〔 Colonies grow via unipolar budding, and hyphae are rarely seen in culture.〔
Optimal growth occurs at with maturation occurring in five days.〔 It is the only species of ''Malassezia'' capable of growing without the presence of fatty acids.〔 Although it is not lipid-dependent, its growth is enhanced by the presence of lipids.〔 Its DNA is characterized by a 56% guanine-cytosine content.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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