When should tetanus prophylaxis be given in combat injuries?

• A. Administer tetanus immunoglobulin only for dirty wounds
• B. Assess tetanus immunization status and administer booster if not up to date; tetanus immunoglobulin for dirty wounds with unknown/incomplete vaccination per protocol
• C. Tetanus prophylaxis is not needed in combat injuries
• D. Give booster every year regardless

Answer: (B)

Tetanus protection in combat injuries relies on combining immediate passive protection with longer-term active immunity, and the approach depends on wound contamination and vaccination history. Tetanus immunoglobulin provides immediate, short-term protection by neutralizing any circulating toxin, which is crucial for dirty or contaminated wounds where the toxin could pose a risk. The tetanus toxoid booster, on the other hand, triggers the body to develop long-lasting immunity, but it needs time to become effective.

So the best course is to first assess the patient’s tetanus vaccination status and give a booster if they are not up to date. If the wound is dirty and the vaccination history is unknown or incomplete, administer tetanus immunoglobulin per protocol in addition to the booster. This combination gives immediate protection and establishes future protection, which is essential in battlefield injuries where wounds are often contaminated and vaccination status may be uncertain.

Yearly boosters are not standard practice, and simply giving immunoglobulin without updating vaccination misses the longer-term defense.