Equine Vaccine Guidelines

Core Vaccination Guidelines:

The core equine vaccines include tetanus, eastern and western equine encephalomyelitis (EEE/WEE), West Nile virus and Rabies.

http://www.aaep.org/info/vaccination-guidelines

Eastern and Western Equine Encephalomyelitis (EEE/WEE):

  • Adult horses: An initial 2-dose series at a 4- to 6-week interval is followed by a yearly booster prior to the vector season. In high-risk animals, and in areas with year-round vectors, more frequent vaccination is recommended during periods of likely exposure (twice yearly).
  • Foals of mares vaccinated against EEE/WEE in prepartum period: Administer a 3-dose series beginning at 4 to 6 months of age with a 4- to 6-week interval between the first and second dose. The third dose is administered at 10 to 12 months of age.
  • Foals of unvaccinated mares or having unknown vaccinal history: Administer a primary series of 3 doses beginning at 3 to 4 months of age, with a 30-day interval between the first and second doses and a 60-day interval between the second and third doses. If the primary series is initiated during the mosquito vector season, an interval of 3 to 4 weeks between the second and third doses is preferable to the above-described interval of 8 weeks.
  • Equine Influenza

    Adult horses: A primary series of 3 doses of the inactivated-virus vaccines is recommended. The ideal intervals between these vaccinations are three to four weeks between the first and the second vaccination, followed by an interval ideally as long as three to six months before the third vaccination. Subsequent revaccination should be at intervals of 6 to 12 months, depending on the age of the horse as well as the degree and duration of risk of acquiring infection. Horses living at facilities where horses move on and off the premises often and horses that compete should be vaccinated every 6 months.

    Foals: A 3-dose series of inactivated-virus vaccine beginning at 6 months of age. The recommended intervals between these vaccinations with an inactivated-virus vaccine are 4 to 6 weeks between the first and the second vaccinations. The third dose should be administered between 10 and 12 months of age.

Equine Herpes Virus (Rhinopneumonitis) EHV1/EHV4

Adult, non-breeding horses:  Administer a primary series of 3 doses of inactivated EHV-1/EHV-4 vaccine or modified-live EHV-1 vaccine. A 4 to 6-week interval between doses is recommended. An annual vaccine is recommended thereafter. For adult horses that move on and off the property often, are kept at breeding facilities, or compete it is recommended to revaccinate every 6 months as immunity is short lived.

Pregnant mares: Vaccinate during the fifth, seventh, and ninth months of gestation using an inactivated EHV-1 vaccine licensed for prevention of abortion.

Foals: Administer a primary series of 3 doses of inactivated EHV-1/EHV-4 vaccine or modified-live EHV-1 vaccine, beginning at 4 to 6 months of age and with a 4 to 6-week interval between the first and second doses. Administer the third dose at 10 to 12 months of age

West Nile Virus:

  • Adult horses: An initial 2-dose series at a 3- to 6-week interval is recommended with a yearly booster prior to the vector season.
  • Foals of vaccinated mares: Administer a primary 3-dose series beginning at 4-6 months of age with a 4- to 6- week interval between the first and second dose. The third dose should be administered at 10 to 12 months of age prior to the onset of the next mosquito season.
  • Foals of unvaccinated mares or having unknown vaccinal history: Administer a primary series of 3 doses beginning at 3 to 4 months of age, with a 30-day interval between the first and second dose and a 60-day interval between the second and third dose.

Rabies:

Rabies is an excellent immunogen and these vaccines induce a strong serologic response after a single dose. (Must be administered by a licensed veterinarian)

  • Adult horses: Following an initial single-dose administration, rabies vaccines are administered as a yearly booster.
  • Foals of mares vaccinated against rabies: Administer a primary 2-dose series. The first dose of vaccine should be administered no earlier than 6 months of age. The second dose should be given 4 to 6 weeks later. Re-vaccinate annually thereafter.
  • Foals of mares not vaccinated against rabies: Administer according to label directions. The first dose of vaccine should be administered at 3 to 4 months of age. Revaccinate annually thereafter.

Risk-Based Vaccines:

The use of risk-based vaccinations may vary regionally, from population to population within an area, or between individual horses within a given population. (Equine herpesvirus type 1 and 4, equine viral arteritis, equine influenza, rotaviral diarrhea and strangles).

Red Hills Veterinary Hospital is happy to assist you with your equine health needs.