Tetanus is caused by toxins produced by the bacterium _____.
Answer
Clostridium tetani
Explanation
The causative bacterium is *Clostridium tetani*. The disease's characteristic rigidity and spasms arise from toxins produced by this organism. **Key takeaway:** Remember the link between *C. tetani* and toxin-mediated tetanus.\n\n**Glossary:** **Causative agent**: the organism responsible for a disease.