Microbiology–February 2019 SECTION – 1 1 Long Essays: (Answer Any Two) 2×10-20 💛 (a) Which is the causative agent of tetanus? Describe the morphology, modes of transmission and lab. Diagnosis of this agent. How tetanus can be prevented ? The causative agent of tetanus is Clostridium tetani. This bacterium is an anaerobic, spore-forming, Gram-positive rod. The disease is primarily caused by the neurotoxin tetanospasmin, which is produced by Clostridium tetani.