What is the role of blood cultures in the evaluation of community-acquired pneumonia (CAP)?

Updated: Oct 31, 2019
  • Author: Stephanie L Baer, MD; Chief Editor: Michael Stuart Bronze, MD  more...
  • Print


In all patients with CAP who meet criteria for hospital admission, obtain blood cultures prior to administering antibiotics because pneumonia due to some bacterial pathogens, such as S pneumoniae and H influenzae, is frequently associated with positive blood cultures. The overall yield from blood cultures is low, as viral and many bacterial pathogens such as M catarrhalis are not often associated with bacteremia. [25]

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!