The most common cause of community-acquired pneumonia is

A. Streptococcus pneumoniae
B. Staphylococcus aureus
C. Klebsiella pneumoniae
D. Mycoplasma pneumoniae
E. Chlamydia pneumoniae


A
Streptococcus pneumoniae, also known as pneumococcus, accounts for about 30% of all cases of community-acquired pneumonia. Staphylococcus is often preceded by viral pneumonia. Klebsiella pneumoniae is the most common gram- negative bacterial cause of community-acquired pneumonia. Nevertheless, it causes less than 1% of all community-acquired pneumonias. Mycoplasma and Chlamydia each account for about 10% of all community-acquired pneumonias.

Health & Biomechanics

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