Pneumocystic carinii pneumonia

Pneumocystis pneumonia, or PCP, is often seen in people with HIV/AIDS. PCP is rare in people with normally functioning immune systems.

Yes

Pneumocystis jirovecii causes pneumonia in people with AIDS. This pathogen was formerly known as Pneumocystic carinii.

There is a yeast that can cause pneumonia, such as Pneumocystis carinii, which was previously thought to be a protozoa. This yeast causes Pneumonia like symptoms and spreads by infected cough droplets.