Pronounced: new-mo-SIS-tis new-MOAN-yaEn Español (Spanish Version)
Pneumocystis pneumonia (PCP) is a form of pneumonia. It affects people who have a weakened immune system. PCP is the most common serious infection among people with AIDS.
The Lungs (Cut-away View)
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PCP is caused by a fungus. Most believe that the fungus is spread in the air but it is not clear if the fungus lives in soil or elsewhere. In healthy people, the fungus can exist in the lungs without causing pneumonia. However, in people who have a weakened immune system, the fungus can spread and cause a lung infection.
Last reviewedJune 2013by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.