) or pneumocystosis
is a form of pneumonia
, caused by the yeast-like fungus
(which had previously been erroneously classified as a protozoan
) Pneumocystis jirovecii
. This pathogen is specific to humans; it has not been shown to infect other animals, while other species of Pneumocystis
that parasitize other animals have not been shown to infect humans.Pneumocystis
is 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
pneumonia is especially seen in people with cancer, HIV/AIDS and the use of medications that affect the immune system.
The older name Pneumocystis carinii,
(which now only applies to the Pneumocystis
species that is found in ratsJames R. Stringer, Charles B. Beard, Robert F. Miller, Ann E. Wakefield. A New Name (Pneumocystis jiroveci
) for Pneumocystis
from Humans. Emerging Infectious Diseases. 2002 Sep; 8(9): 891-6.
Regarding nomenclature, when the name of Pneumocystis pneumonia... Read More