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A “standard” vaccination program for all horses does not exist. The American Association of Equine Practitioners has developed a list of Core or recommended vaccines for each horse. Other vaccines are administered on a case by case basis depending on the risk of exposure to theses diseases.Core Vaccines
- Tetanus – an often fatal disease caused by a potent neurotoxin from the anaerobic, spore-forming bacterium, Clostridium tetani.
- Eastern/Western Equine Encephalitis – a neurologic disease caused by a virus which can be transmitted by mosquitoes. Typically 90% of Eastern Equine Encephalitis (EEE) cases die from the disease.
- Rabies – an infrequently encountered neurologic disease of horses. While the incidence of rabies in horses is low, the disease is fatal and has considerable public health significance.
- West Nile Virus – A neurologic disease of horses typically spread from one infected animal to another by biting flies or mosquitos. Horses represent 96.9% of all non-human mammalian cases of WNV disease.
Non-Core Vaccines
Equine Influenza (Flu), Rhinopneumonitis (Rhino), Strangles, Potomac Horse Fever, Botulism
There are risks with vaccination and each individual situation requires evaluation based on the following criteria:
- Risk of disease (anticipated exposure, environmental factors, geographic factors, age, breed, use, and sex of the horse)
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- Consequences of the disease
- Anticipated effectiveness of the selected product(s)
- Potential for adverse reactions to a vaccine(s)
- Cost of immunization (time, labor and vaccine costs) vs. potential cost of disease (time out of competition; impact of movement restrictions imposed in order to control an outbreak of contagious disease; labor and medication if, or when, horses develop clinical disease and require treatment, or loss of life.)
A good vaccination program is always recommended, however, it is important to realize that:
- Vaccination alone, in the absence of good management practices directed at infection control, is not sufficient for the prevention of infectious disease.
- Vaccination serves to minimize the risks of infection but cannot prevent disease in all circumstances.
- The primary series of vaccines and booster doses should be appropriately administered prior to likely exposure.
- Each horse in a population is not protected to an equal degree nor for an equal duration following vaccination.
- Protection is not immediately afforded the patient after administration of a vaccine that is designed to induce active immunity. In most instances, a priming series of multiple doses of a vaccine must be administered initially for that vaccine to induce protective active immunity.
- All horses in a herd should be vaccinated at intervals based on the professional opinion of the attending veterinarian