In the majority of Pneumonia cases, a germ or bacteria invades the lungs tissue and causes it to become inflamed. Fluids will begin to collect in and around the air sacs of the lungs, which interferes with the lungs ability to take in oxygen and move it to the cells of the body, where it is needed. The body becomes over stressed as it has to work harder and harder to fight the infection that caused the pneumonia. Doctors will usually divide Pneumonia into three types: community-acquired, nursing home-acquired, and hospital-acquired. These types can be further classified by their varied causes, the most common of which are listed below.
The most common cause of Pneumonia in adults is bacteria. This type will usually start after the patient has had the flu, a cold, or an upper respiratory infection. These illnesses can weaken the immune system. Weakened defenses in the body allow bacteria to multiply in the lungs, causing Pneumonia. There are many different classifications of bacteria that can cause pneumonia. The most common of these is Streptococcus Pneumoniae. Germs may be spread when an already infected person coughs, sneezes or touches objects with unwashed hands. That is why hygiene, especially during illness, is crucial. In many cases bacterial Pneumonia is more serious than viral pneumonia.