11-17-2007, 09:01 AM
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Tetanus is defintely every year in horses even though we don't have to have them that often as humans. This is because horses are highly susceptible to tetanus (one of the most susceptible creatures in the world), they shed the bacteria in their feces so they live in a constantly contaminated environment (they don't just get it from rusty stuff) and after the initial infection symptoms are not seen for several weeks to months and infections are 100% fatal in horses (by the time you see symptoms, there is nothing you can do).
For foals you have to give an initial series of 2-3 vaccinations, but in adult horses most vet will just start them on yearly vaccinations without the boosters if vaccination history is unknown.