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Cryptococcus : ウィキペディア英語版 | Cryptococcus
''Cryptococcus'' (Greek for "hidden sphere") is a genus of fungus. These fungi grow in culture as yeasts. The sexual forms or teleomorphs of ''Cryptococcus'' species are filamentous fungi in the genus ''Filobasidiella''. The name ''Cryptococcus'' is used when referring to the yeast states of the fungi. ==General characteristics== The cells of these species are covered in a thin layer of glycoprotein capsular material that has a gelatin-like consistency and that, among other functions, serves to help extract nutrients from the soil. However, the ''C. neoformans'' capsule is different, in being richer in glucuronic acid and mannose, having O-acetyl groups,〔Ross A, Taylor IE (1981) Extracellular glycoprotein from virulent and avirulent Cryptococcus species. Infection and Immunity. 31(3):911–8〕 and functioning as the major virulence factor in cryptococcal infection and disease.〔Casadevall A and Perfect JR (1998) Cryptococcus neoformans. American Society for Microbiolgy, ASM Press, Washington DC, 1st edition.〕
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