Which of the following is the most common bacterial community-acquired agent in patients with pneumonia?

Question

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Streptococcus pneumoniae is the most common bacterial community-acquired agent in patients with pneumonia. Staphylococcus aureus is also a common cause but is typically associated with healthcare-associated pneumonia. Streptococcus calcaneus is not a known pneumonia-causing pathogen. Mycoplasma pneumoniae is a common cause of atypical pneumonia but is not a bacterial agent.

Which of the Following Is the Most Common Bacterial Community-Acquired