A silent cycle of equine herpesvirus 1 infection was described following epidemiological studies of unvaccinated mares and foals on a Hunter Valley stud farm. Following the introduction of routine vaccination with an inactivated whole virus equine herpesvirus 1 (EHV-1) and equine herpesvirus 4 (EHV-4) vaccine in 1997, a subsequent study identified excretion of EHV-1 and EHV-4 in nasal swab samples tested by PCR from vaccinated mares and their unweaned, unvaccinated foals. The current sero-epidemiological investigation of vaccinated mares and their young foals found serological evidence of EHV-1 and EHV-4 infection in mares and foals in the first 5 weeks of life. The results further support that EHV-1 and EHV-4 circulate in vaccinated populations of mares and their unweaned foals and confirms the continuation of the cycle of EHV-1 and EHV-4 infection.
- equine herpesvirus 1
- ELISA antibody
Foote, C. E., Love, D. N., Gilkerson, J. R., Wellington, J. E., & Whalley, J. M. (2006). EHV-1 and EHV-4 infection in vaccinated mares and their foals. Veterinary immunology and immunopathology, 111(1-2), 41-46. https://doi.org/10.1016/j.vetimm.2006.01.007