what is pneumocystis carinii
Pneumocystis pneumonia (PCP) is a form of pneumonia, caused by the yeast-like fungus Pneumocystis jirovecii.Pneumocystis pneumonia is not commonly found in the lungs of healthy people, but, being a source of opportunistic infection, it can cause a lung infection in people with a weak immune system.he older species name Pneumocystis carinii (which now applies only to the Pneumocystis species that is found in rats) is still in common usage. As a result, Pneumocystis pneumonia (PCP) is also known as Pneumocystis jiroveci[i] pneumonia and (incorrectly) as Pneumocystis carinii pneumonia.