Cryptococcus neoformans

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Cryptococcus neoformans

It is an encapsulated yeast that can live in both plants and animals. Its teleomorph is Filobasidiella neoformans, a filamentous fungus belonging to the class Tremellomycetes.

Scientific classification
Kingdom Fungi
Phylum Basidiomycota
Class Tremellomycetes
Order Tremellales
Family Tremellaceae
Genus Cryptococcus
Species C. neoformans
Binomial Cryptococcus neoformans


Surface Characteristics

The cell wall contains a linear (1-->3)-linked mannan backbone singly substituted with nonreducing β(1-->2) xylose and β(1-->2) glucuronic acid side branches ; O-acetyl groups are present at C-6 of the mannosyl residues.

Pathogenic Activity

Infection with C. neoformans is termed cryptococcosis. Most infections with C. neoformans consist of a lung infection. However, fungal meningitis, especially as a secondary infection for AIDS patients, is often caused by C. neoformans making it a particularly dangerous fungus. Infections with this fungus are rare in those with fully functioning immune systems. For this reason, C. neoformans is sometimes referred to as an opportunistic fungus.