Equine Herpes Virus (EHV)

Infection with Equine Herpes Virus (EHV) can cause a variety of signs, depending on which strain of the virus is causing the infection. Vaccination is possible against strains 1 and 4, which can cause performance limiting respiratory disease and abortion. The primary vaccination course consists of two doses given 4-6 weeks apart followed by 6 monthly boosters. Pregnant mares should also be vaccinated against EHV in the 5th, 7th and 9th months of pregnancy to protect against abortion.