Merck Manual

Please confirm that you are a health care professional

honeypot link
Example of Vaccination Schedule for Broodmares

Example of Vaccination Schedule for Broodmares

Vaccine

Schedule

Equine rhinopneumonitis (inactivated)

EHV-1 at 5, 7, and 9 months of gestation; EHV-1/EHV-4 4–6 weeks before due date

Tetanus (toxoid)

4–6 weeks before due date

4–6 weeks before due date; if unvaccinated, initially administer two doses at 4–6 week intervals and then a third dose 4–6 weeks before due date

Usually administered to mares in late spring or early summer before onset of insect season; initially administer two doses at a 4–6 week interval; 4–6 weeks before due date

4–6 weeks before due date

Initially three doses at 4–6 week intervals, then annual booster 4–6 weeks before due date

Initially two doses at a 4–6 week interval; 4–6 weeks before due date

8, 9, and 10 months of gestation

A negative titer should be documented by a USDA-approved laboratory before vaccination; pregnant mares should not be vaccinated; open mares should be vaccinated before breeding to a positive stallion that is shedding the virus; vaccinated horses must be isolated for 3 weeks after vaccination; annual boosters recommended; positive titers may cause problems if mare is to be exported or bred on certain farms. (Stallions should also be vaccinated 3 months before breeding.)

Initially administer two doses at a 3–4 month interval; 4–6 weeks before due date