Aspiration pneumonia is best described as

• A. Occurs when inhaling air from the environment
• B. Occurs only in immunocompromised patients
• C. Occurs when saliva, food, or vomit is inhaled into the lungs
• D. Always presents with fever

Answer: (C)

Aspiration pneumonia happens when material from the mouth or throat—saliva, food, or vomit—is inhaled into the lungs, bringing oral bacteria into the lower airways. This is why the best description is that it occurs when saliva, food, or vomit is inhaled into the lungs. It can occur in anyone with impaired swallowing or reduced consciousness, not only in the immunocompromised, and fever is not required for diagnosis. The infection is often polymicrobial, reflecting oral flora including anaerobes, and it’s distinct from chemical aspiration pneumonitis, which is injury from gastric contents without infection.