Equine Tetanus is a serious disease caused by a clostridial bacteria which produces very dangerous toxins when it starts to breed in cuts and wounds. The toxin is so dangerous it kills horses very quickly causing characteristic nervous signs. The bacteria enters the body through wounds such as may occur when a hoof is punctured, or when sharp objects cause deep cuts. If unlucky infections after castrations and giving birth can result in tetanus bacteria entering the body.
Equine Tetanus enters the horse's body when spores that the bacteria makes contaminate a wound. Such spores are quite common in soil and dirt and lay dormant for many years. It is therefore impossible to know when tetanus may arise and vaccination is very important to prevent infection.