Tetanus in Horses: Understanding the Connection & Risks

Tetanus in Horses: Risks and Human Implications

Horses are highly susceptible to tetanus due to their environment and behavior. The causative bacterium, Clostridium tetani, is ubiquitous in soil, dust, and manure.

Equine Infection

• Entry via puncture wounds (nails, wire), hoof injuries, surgical incisions, or foaling trauma.
• Toxin (tetanospasmin) blocks inhibitory neurotransmitters → muscle rigidity, spasms, lockjaw (trismus), "sawhorse" stance, hypersensitivity.
• Fatal without intensive care (antitoxin, antibiotics, sedation, supportive care).

Human Risk

Humans can contract tetanus from the same environmental spores. Equine contact rarely transmits tetanus directly, but contaminated wounds from horse‑related injuries (kicks, bites, falls) pose risk. Human tetanus is preventable by vaccination (DTaP/Tdap boosters every 10 years) and proper wound care.

Equine Prevention

• Tetanus toxoid vaccination (core vaccine per AAEP): initial series, annual boosters.
• Clean environment, prompt wound management, hoof care.
• Veterinary oversight for surgical procedures.