Horse Health & Care

Horse Vaccination Chart

About Vaccines

How Do They Work?

1. You inject the horse with an inactivated form of the organism that causes the disease.
2. The horse’s immune system produces antibodies that fight that organism.

Important Facts:

1. The horse’s immune system takes a minimum of 2 weeks to accumulate the antibodies needed.
2. Always vaccinate at least 3-4 weeks before likely exposure to a disease.
3. Always discuss with your veterinarian whether there are additional vaccinations recommended for your area or situation.
4. Your vet can inoculate your horse against several diseases with only one shot.
5. The best time for annual vaccinations is in the spring time before insect season starts.

Horse Vaccination Chart

Important: New vaccines are created frequently. Please check with your veterinarian for the most updated vaccines and health care schedules. Ask your vet about the new West Nile Virus vaccine, and the EPM vaccine. This chart is supplied only as an example of a Foal’s Vaccination Schedule. Your horse’s vaccination schedule should be tailored specifically to your horse’s needs by your veterinarian.

Horse Vaccination Chart
Horse Vaccination Chart

DISEASE:

VACCINATION

Botulism

Organism: Clostridium botulinum. Organism is ingested or absorbed through wounds. Causes neurologic disease.

DOSAGE:
Annually

NOTES: Preganant mares in areas of high risk (mostly Kentucky and Ohio) should be vaccinated 1 month prior to foaling to prevent shaker foal syndrome, a neurologic disease in newborn foals.

Encephalomyelitis

(EEE,WEE,VEE)

Insect-bourne neurologic disease that is fatal.

DOSAGE:
Annually

NOTES: Mandatory vaccination. Booster every 6 months in risky areas. Should be administered in spring just before insects appear. Humans can become infected if not vaccinated.

Tetanus

Organism: Clostridium tetani. Organism enters wounds and releases toxins resulting in neurologic disease. Can be fatal.

DOSAGE:
Annually

NOTES: Re-vaccinate if wounded 6 months or more after most recent booster. Tetanus organism is present in every region.

Influenza

Respiratory infection. Signs: fever, depression, nasal discharge, cough.

DOSAGE:
Annually
Booster 3 wks before competition or likely exposure

NOTES: Producing & maintaining an effective vaccine is difficult, since there are many strains of the virus.

Strangles

Organism: Streptocuccus equi. Respiratory infection. Signs: fever, nasal discharge, abscessed lymph nodes under lower jaw.

DOSAGE:
Annually

NOTES: Highly contagious.

Potomac Horse Fever

Orgamism: Ehrlichia risticii. Severe diarrhea with high rate of fatality.

DOSAGE:
Annually

NOTES: Only in eastern half of US. Vaccinate every 4 months in high risk areas. Annually where risk is low. Vaccine is incomplete and short-lived, but vaccinated animals have a lower mortality rate and less severe signs with the disease.

Rabies

Neurologic disease. 100% fatal.

DOSAGE:
Annually

NOTES: 

Rhinopneumonitis

Equine Herpes Virus. Two strains: EHV-1 and EHV-4.

DOSAGE:
Booster 3 wks before likely exposure.
Annually

NOTES: EHV-4 causes respiratory disease. EHV-1 causes abortion in pregnant mares, neurologic disease in mature horses, and respiratory disease. This virus is very widespread.

Equine Viral Arteritis

Respiratory disease. Signs: high fever, edema, leaky blood vessels. Abortion in preg. mares.

DOSAGE:
Annually

NOTES: Only mandatory if breeding. Check regulations prior to vaccinating.

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