When someone spreads bacteria through droplets in sneezes or coughs, or through skin contact, those around him can develop bacterial pneumonia, notes Healthline. The most common bacteria involved are streptococcus pneumoniae, haemophilus influenzae, staphylococcus aureus and klebsiella pneumoniae. In hospital settings, MRSA and pseudomonas aeruginosa are the most common bacteria.
Community-acquired pneumonia, or CAP, is pneumonia that people catch outside hospitals and other healthcare settings and is the most common form. Those who catch it while already in the hospital have hospital-acquired pneumonia, or HAP. Because people in a hospital are generally sick already, this sort of infection is more dangerous than CAP, according to Healthline.
Adults older than 65, children and infants, people with immune system disorders, immunosuppressant drug users, smokers and COPD patients with long-term use of corticosteroids have an elevated risk of developing pneumonia. Symptoms include a cough with green, yellow or bloody mucus; chest pain that grows while breathing or coughing; pale, damp skin; appetite loss; and pain in the head and muscles. Fever over 102 degrees is common, although senior citizens have lower fevers, reports Healthline.
Doctors diagnose bacterial pneumonia by listening for anomalous chest sounds, taking a blood sample to test for infection and running chest X-rays to confirm that the infection is present. Treatments often involve antibiotics and medications to ease cough and control fever, as stated by Healthline.