Antibiotics are indicated in COPD exacerbations when there is increased sputum purulence. Which option best reflects this criterion?

Antibiotics are indicated in COPD exacerbations when there is increased sputum purulence. Which option best reflects this criterion?

• A. Increased dyspnea
• B. Increased sputum purulence
• C. Cough
• D. Fever

Answer: (B)

The key idea is that antibiotics in COPD exacerbations are guided by evidence of a bacterial infection, and sputum purulence is a direct marker of that. Purulent sputum indicates a bacterial component to the flare, which helps justify antibiotic therapy. Often guidelines require purulence together with another sign of increased disease activity, but purulence itself is the strongest clue among the options given. The other signs—more difficult breathing, cough, or fever—can occur for many reasons and are not by themselves as specific to bacterial infection as purulence is. So describing increased sputum purulence best reflects the criterion for using antibiotics in this scenario.

The key idea is that antibiotics in COPD exacerbations are guided by evidence of a bacterial infection, and sputum purulence is a direct marker of that. Purulent sputum indicates a bacterial component to the flare, which helps justify antibiotic therapy. Often guidelines require purulence together with another sign of increased disease activity, but purulence itself is the strongest clue among the options given. The other signs—more difficult breathing, cough, or fever—can occur for many reasons and are not by themselves as specific to bacterial infection as purulence is. So describing increased sputum purulence best reflects the criterion for using antibiotics in this scenario.