11/21/2025
As many of you may have recently seen on social media, there have been some confirmed cases of neurologic disease caused by equine herpes virus (EHM) diagnosed in the southern USA and a single isolated case in central Alberta. While we don't know of any evidence that these cases are linked, it is a good reminder for all of our clients to re-evaluate their protocols around infectious disease control and biosecurity. See below for tips on disease prevention and don't hesitate to reach out to our veterinary team if you have any questions or concerns!
1. Vaccination:
While vaccination against equine herpes virus does not prevent the neurologic form, regular booster administration helps to reduce viral shedding and shorten the course and severity of disease limiting spread. It is recommended that showing or travelling horses receive booster flu/rhino vaccination every 6 months for peak immunity.
2. Biosecurity:
-Avoid unnecessary travel to areas of known outbreaks.
-Keep horses separated based on their risk (i.e. horses that travel versus those that don't).
-Do not share equipment between horses including tack, buckets, water hoses, grooming tools, and mucking out equipment.
-Regularly disinfect any shared equipment (e.g. thermometers) and spaces (stalls, trailers, etc).
-Wash hands or hand sanitize between horses.
-Change clothes between sick horses or barns.
-Immediately isolate any horses with fever or other signs of infectious disease.
3. Monitor Re**al Temperatures:
Fever is typically the first sign of infection. If you are concerned about possible exposure, monitor your horse's temperature and seek veterinary care if a fever is noted (> 38.5C or 101.5F)
4. Monitor Horses:
Early signs of disease include fever, weakness in hind end, decreased tail tone, difficulty urinating, wide-based stance, incoordination or ataxia, lethargy, or decreased appetite. Contact your veterinarian immediately if any concerns are noted.
More information on EHV-1 can be found here:
https://equinediseasecc.org/handler/managedfilehandler.ashx?id=72&ext=pdf
