11/21/2025
Some great reminders to consider during this recent disease outbreak in the southern US.
This is info directly from Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP):
The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) has been notified an outbreak of Equine Herpes Virus (EHV)/Equine Herpes Myeloencephalopathy (EHM) in horses that attended barrel racing and rodeo events in Texas and Oklahoma in November. Several cases of EHM have been confirmed in Texas and Oklahoma, with reports of additional cases and equine deaths pending investigation.
DATCP is monitoring this situation closely. Currently, there are no reported cases of EHV/EHM in Wisconsin. The last reported case in Wisconsin was in April 2025. Texas and Oklahoma are still working to notify states of participants in these events. DATCP will follow-up with any participants from Wisconsin to mitigate further spread of the disease.
Horse Owners: If your horses traveled to Texas, Oklahoma, or other equine events where EHV exposure may have occurred, please contact our office directly: (608) 590-5997. We will provide instructions regarding isolation and monitoring.
As we continue to monitor the current outbreak of the neurologic form of equine herpesvirus (EHM) infection, let's take this opportunity to discuss once more the importance of biosecurity measures to stop disease spread. We recommend the following biosecurity precautions for horse owners, particularly if their horses have recently traveled to horse shows or were exposed to horses that have traveled:
1) Monitor horses for clinical signs (including fever, discharge from the nostrils, toe-dragging or a lack of balance) and take the temperature twice daily. Temperature greater than 101.5 F is considered a fever.
2) Immediately isolate any horse(s) showing clinical signs. Equine herpesvirus is an aerosolized virus and is spread through shared airspace, direct contact, and contaminated caretakers or equipment. A good isolation area is a separate barn or shelter that does not share airspace with healthy horses.
3) Implement movement restrictions until the situation is evaluated.
4) Contact your veterinarian to evaluate your horse and to propose a comprehensive biosecurity protocol.
5) Increase biosecurity measures that include extensive cleaning and disinfection of surfaces and equipment that come in contact with affected horses: wash or sanitize your hands between interacting with horses; take time while filling water buckets and feed tubs, do not cross contaminate; minimize the use of shared equipment and tack.
6) Make sure your horse is up to date on vaccinations.
7) Establish communication with all parties involved (owners, boarders, trainers, etc.).
More resources and information regarding biosecurity are available on the Equine Disease Communication Center's website at https://equinediseasecc.org/biosecurity
To learn more Equine Herpesvirus (EHV), visit: https://www.equinediseasecc.org/equine-herpesvirus