Multiple choice Which of the following diseases is also known as lockjaw disease? Toxoplasmosis Isosporiasis Diphtheria Tetanus Reveal answer Fill a bubble to check yourself D Correct answer Explanation Tetanus, also known as lockjaw, is a serious but preventable disease that affects the body's muscles and nerves. It typically arises from a skin wound that becomes contaminated by a bacterium called Clostridium tetani, which is often found in soil.