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What are the different types of bacterial pneumonia?

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The different types of bacterial pneumonia include community-acquired pneumonia, hospital-acquired pneumonia and atypical pneumonia, which occurs when people get into contact with infected patients. The naming of pneumonia is based on how a person contracts the illness or the bacteria that cause it, notes the National Institute of Allergy and Infectious Diseases.

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Nosocomial pneumonia is acquired in hospitals and may be severe. It occurs when patients use breathing machines, explains MedlinePlus. Mycoplasma bacteria cause walking pneumonia, a mild form of atypical pneumonia that does not require bed rest, notes Mayo Clinic. It affects people younger than 40, while chlamydia bacteria cause year-round pneumonia. Legionella bacteria affect middle-aged and older patients and those with weakened immunity, according to MedlinePlus.

Community-acquired pneumonia occurs in home and work settings and affects nearly four million people yearly in the United States, notes the National Heart, Lung and Blood Institute. The bacterial strain streptococcus pneumoniae causes pneumococcal pneumonia, which affects a person’s upper respiratory tract, lungs, middle ear and nervous systems in severe cases. People who suffer from sickle cell anemia, liver disease or chronic heart disease are prone to the disease, as are those with AIDS, according to the National Institute of Allergy and Infectious Diseases.

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