Which sputum color is NOT commonly associated with pneumonia?

Which sputum color is NOT commonly associated with pneumonia?

• A. Green
• B. Yellow
• C. Rust-colored
• D. Clear

Answer: (D)

The key idea is how sputum color reflects the inflammatory and infectious processes in pneumonia. Green sputum is common in bacterial infections because white blood cell enzymes color the secretions. Yellow sputum also fits with purulent, bacterial-associated inflammation. Rust-colored sputum indicates blood-tinged material from alveolar damage, which can occur with pneumococcal pneumonia. Clear sputum, however, suggests nonpurulent secretions and is not typically linked with pneumonia; it’s more often seen with viral infections or noninfectious airway inflammation. So clear sputum is the color not commonly associated with pneumonia.

The key idea is how sputum color reflects the inflammatory and infectious processes in pneumonia. Green sputum is common in bacterial infections because white blood cell enzymes color the secretions. Yellow sputum also fits with purulent, bacterial-associated inflammation. Rust-colored sputum indicates blood-tinged material from alveolar damage, which can occur with pneumococcal pneumonia. Clear sputum, however, suggests nonpurulent secretions and is not typically linked with pneumonia; it’s more often seen with viral infections or noninfectious airway inflammation. So clear sputum is the color not commonly associated with pneumonia.