Clostridium tetani is a bacterium that is commonly found in soil, dust, and manure. It is an obligate anaerobe, meaning that it can only grow in the absence of oxygen. C. tetani is also a spore-forming bacterium, meaning that it can form dormant spores that are resistant to harsh environmental conditions. These spores can survive for many years in soil and dust.

When a person comes into contact with C. tetani spores, they can enter the body through a wound. Once inside the body, the spores can germinate and grow into vegetative cells. These cells produce a toxin called tetanospasmin, which affects the nervous system and causes tetanus.

Tetanus is a serious disease that can be fatal. Symptoms of tetanus include muscle stiffness, spasms, and difficulty breathing. Treatment for tetanus includes antibiotics, antitoxin, and supportive care.