Which system is primarily affected by tetanus?: (A) Hematological, (B) Nervous, (C) Skeletal, (D) All
Answer is B. Nervous REF: Harrison's Internal Medicine 17th edition chapter 133 "Tetanus is a neurologic disorder, characterized by increased muscle tone and spasms that is caused by tetanospasmin, a powerful protein toxin elaborated by Clostridium tetani"