what causes bacterial pneumonia
Pneumonia is an infection of the lungs. People with pneumonia often complain about coughing, fever, shaking chills, and shortness of breath. 1  Your body's immune system usually keeps bacteria from infecting your lungs.2  In pneumonia, bacteria reproduce in your lungs, while your body tries to fight off the infection.f you inhale toxic materials, you can injure your lungs and cause chemical pneumonia. Fungus also can cause pneumonia. In certain areas of the United States, specific fungi are well known. Coccidioidomycosis causes a pneumonia called San Joaquin fever or  Valley fever  in the desert regions of California.