The different types of pneumonia include community-acquired pneumonia, health care-acquired pneumonia, hospital-acquired pneumonia and aspiration pneumonia, according to Mayo Clinic. Pneumonia is categorized according to the origin of the infection and the sort of germs that cause the condition.
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.