What are the different types of pneumonia?
The most common type of pneumonia is community acquired-pneumonia, which occurs outside hospitals and health care centers and is caused by bacteria, bacteria-like organisms, viruses and fungi. Health care-acquired pneumonia is a bacterial infection acquired by people who reside in long-term care facilities or who have had treatment from outpatient clinics, states Mayo Clinic. Hospital acquired-pneumonia is a bacterial infection acquired in the course of a hospital stay for another condition. Aspiration pneumonia comes about when a person inhales food, liquid, saliva or vomit into the lungs.