FOR IMMEDIATE RELEASE:
Contact: Jenny Green
Communications Specialist
jgreen@nmda.nmsu.edu
Office: 575-646-3060
Cell: 575-202-4249
April 24, 2025
State officials remind horse owners to vaccinate against West Nile virus
LAS CRUCES, N.M. – State officials are reminding horse owners to vaccinate their animals against West Nile virus.
The New Mexico Department of Agriculture (NMDA), in partnership with the New Mexico Department of Health (NMDOH) and the New Mexico Livestock Board, encourages horse owners to contact their veterinarian about vaccination. West Nile virus and other mosquito-borne diseases, such as Eastern and Western Equine Encephalitis, pose serious health risks to horses.
Horses become infected through mosquito bites, and while many may not show symptoms, some can experience serious neurological illness, or even die. Clinical signs may include fever, stumbling, muscle tremors and behavior changes.
“Vaccinating horses against West Nile virus is one of the most effective steps owners can take to protect their animals during mosquito season,” said Dr. Samantha Holeck, New Mexico State Veterinarian. “Prevention through vaccination is far safer – and often less costly – than trying to treat the horse after infection.”
In 2023, New Mexico saw 19 confirmed cases of West Nile virus in horses—six of which were fatal. According to the American Association of Equine Practitioners, West Nile virus vaccination is considered a core equine vaccine.
“There is no specific cure for West Nile virus in horses,” said Dr. Erin Phipps, NMDOH Public Health Veterinarian. “Vaccination is the best protection.”
For more information on equine vaccination guidelines, visit aaep.org or see NMDA’s West Nile virus fact sheet.
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