A case of Eastern Equine Encephalitis (EEE) has been confirmed in Ocean County, marking the third instance of the disease this season. The affected horse, a 28-year-old Grade breed mare, was unvaccinated and exhibited symptoms such as depression, ataxia, disorientation, and falling. Due to worsening conditions, the horse was euthanized. Earlier cases were reported in Gloucester and Salem Counties in late 2023.
Most regions in New Jersey have reported mosquito populations near the five-year average this season. However, this case occurred outside the typical mosquito-borne disease season for the state. The horse had not traveled recently, suggesting local transmission. Warmer than average temperatures at the end of the mosquito season may have contributed to exposure.
Livestock owners are urged to vaccinate their animals against EEE and West Nile Virus (WNV), as effective vaccines are available commercially. “We continue to encourage horse owners to be vigilant in vaccinating their animals against these diseases spread by mosquitoes,” stated Joseph Atchison III, New Jersey Assistant Secretary of Agriculture. “Vaccinated animals are much less likely to contract deadly diseases such as EEE and West Nile Virus.”
For further information on EEE in horses, visit the New Jersey Department of Agriculture website.
