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Pneumocystis carinii: a fungal villain masquerading as a protozoan

Published online by Cambridge University Press:  08 January 2003

Ann E. Wakefield
Ann E. Wakefield
Affiliation:
Molecular Infectious Diseases Group, Department of Paediatrics, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Oxford OX3 9DS, UK. E-mail: [email protected]
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Abstract

Pneumocystis is an enigmatic organism, the clinical significance of which remained unrecognised until recently. It is a respiratory pathogen, causing pneumonia which, if untreated, is fatal. For many years its very nature was shrouded in uncertainty, but we now know unequivocally that it is a fungus and an important agent of fungal disease in certain specific settings. Pneumocystis was first seen in the lungs of guinea pigs by Carlos Chagas in 1909, and then in rat lungs by Antonio Carini. Both thought it was a type of trypanosome. In 1912, the Delanoë husband-and-wife team recognised that it was a distinct organism and named it Pneumocystis carinii, on account of the cyst-like morphology of the organism and in honour of Antonio Carini. It was first seen as an infection in humans in the 1920s, among infants with interstitial plasma cell pneumonia.

Type
Original Article
Information
Mycologist , Volume 16 , Issue 4 , November 2002 , pp. 138 - 139
Copyright
© 2002 Cambridge University Press

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