Community-Acquired Pneumonia: The Daily PANCE Blueprint

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Community-Acquired Pneumonia: The Daily PANCE Blueprint

A 62-year-old woman presents with fever, a productive cough with rust-colored sputum, pleuritic chest pain, focal bronchial breath sounds with dullness, and a lobar infiltrate on chest radiograph. What is the most likely causative organism?

A. Streptococcus pneumoniae
B. Mycoplasma pneumoniae
C. Legionella pneumophila
D. Haemophilus influenzae
E. Klebsiella pneumoniae

Answer and topic summary

The answer is A. Streptococcus pneumoniae.

Rust-colored sputum with lobar consolidation is the classic picture of Streptococcus pneumoniae, the most common bacterial cause of community-acquired pneumonia. Mycoplasma causes ‘walking pneumonia’ in younger patients with diffuse interstitial findings; Legionella is linked to water sources, GI symptoms, and hyponatremia; Haemophilus influenzae is common in COPD; and Klebsiella produces ‘currant-jelly’ sputum in people with alcohol use or aspiration.

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Covered under ⇒ PANCE Blueprint Pulmonary ⇒ Infectious Disorders ⇒ Pneumonias

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