Community-Acquired Pneumonia

Community-Acquired Pneumonia is a topic covered in the Washington Manual of Medical Therapeutics.

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General Principles

  • The predominant organism involved is S. pneumoniae; other bacterial etiologies are H. influenzae and M. catarrhalis. Pneumonia caused by atypical agents, such as Legionella pneumophila, C. pneumoniae, or M. pneumoniae, cannot be reliably distinguished clinically. Influenza and other respiratory viruses may also cause pneumonia in adults.
  • Community-acquired MRSA is an important cause of severe, necrotizing pneumonia.
  • Patients aged 65 or older, and those with certain medical conditions, should receive the pneumococcal vaccination with both the 23-valent and the 13-valent vaccine, as recommended per CDC guidelines.1

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General Principles

  • The predominant organism involved is S. pneumoniae; other bacterial etiologies are H. influenzae and M. catarrhalis. Pneumonia caused by atypical agents, such as Legionella pneumophila, C. pneumoniae, or M. pneumoniae, cannot be reliably distinguished clinically. Influenza and other respiratory viruses may also cause pneumonia in adults.
  • Community-acquired MRSA is an important cause of severe, necrotizing pneumonia.
  • Patients aged 65 or older, and those with certain medical conditions, should receive the pneumococcal vaccination with both the 23-valent and the 13-valent vaccine, as recommended per CDC guidelines.1

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