A patient consulted a dentist about limited mouth opening (trismus). He has a history of a stab wound of the lower extremity. What infection may cause these symptoms?

Answer options

1. Tularemia
2. Wound anaerobic infection
3. Brucellosis
4. Tetanus
5. Whooping cough

Explanation

Trismus is the spasm of the jaw muscles causing the mouth to remain tightly close as a symptom of tetanus.