A member asked:

What's the most common organism that causes pneumonia?

3 doctors weighed in across 2 answers

Strep. pneumoniae: This bacteria accounts for about 45% of community acquired pneumonia. There is an effective vaccine against it which should be given to people with lung disease, diabetes and cardiac disease and anyone over 65.

Answered 4/7/2013

5.6k views

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S pneumonia: Streptococcus pneumonia is the most common bacterial cause.

Answered 9/20/2012

5.6k views

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