Commonest cause for Community-acquired pneumonia is
Streptococcus pneumonia
Haemophilus influenzae
Mycoplasma pneumoniae.
Staphylococcus aureus,
Legionella
Correct Answer
Streptococcus pneumonia
Community-acquired pneumonia (CAP) may be primary or secondary to underlying disease.Streptococcus pneumoniae is the commonest cause, followed by Haemophilus influenzae and Mycoplasma pneumoniae. Staphylococcus aureus, Legionella species, Moraxella catarrhalis, and Chlamydia account for most of the remainder. Gram negative bacilli, Coxiella burnetii and anaerobes are rare. Viruses account for up to 15%