Medical Dictionary

Pneumocystis

noun Pneu·mo·cys·tis \ ˌn(y)ü-mə-ˈsis-təs \

medical Definition of Pneumocystis

1 : a genus of ascomycetous fungi that were formerly classified as protozoans and include one (P. carinii synonym P. jiroveci) causing pneumonia especially in immunocompromised individuals

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