Monarch Disease Ontology identifier MONDO_0005526 (tetanus) is a serious infectious disorder that follows wound contamination by the Gram-positive bacterium Clostridium tetani. The bacteria produce a neurotoxin called tetanospasmin, which causes muscle spasm in the jaw and other anatomic sites. Also known as: Clostridium tetani caused infectious disease of the nervous system, Clostridium tetani infectious disease of the nervous system, clostridial tetanus, infection due to Clostridium tetani.