Which sign most clearly indicates a wound infection requiring intervention?

• A. Redness
• B. Warmth
• C. Purulent drainage
• D. Fever

Answer: (C)

Purulent drainage is the clearest signal that a wound is infected and needs intervention because it provides direct evidence of bacteria at the wound site. The pus contains bacteria, immune cells, and debris, indicating active infection within the wound and a need for action such as wound culture to identify the organism, appropriate wound care, possible antibiotics, and close monitoring for any spread or systemic involvement. Redness and warmth can occur with noninfectious inflammation or irritation and fever reflects a systemic response that isn’t specific to the wound itself, so they don’t point as directly to a localized wound infection.