Bacterial Pneumonia Overview

Bacterial pneumonia is an infection of the lungs by bacteria. Streptococcus pneumoniae is the most common bacterial cause of pneumonia in all age groups except newborn infants. Streptococcus pneumoniae is a Gram-positive bacteria which often lives in the throat of people who do not have pneumonia. Another important Gram-positive cause of pneumonia is Staphylococcus aureus . Gram-negative bacteria are seen less frequently; Haemophilus influenzae , Klebsiella pneumoniae , Escherichia coli...