12/06/2025
🚨 EHV-1 / EHM Update for Alberta Horse Owners 🚨
Alberta has recently confirmed multiple EHM cases, including:
• Two cases in November 2025; one horse was euthanized due to severe neurologic decline
• Another confirmed case in early December 2025
These cases show that EHV-1 is still circulating and barns should remain alert.
🔹 Early Signs to Watch For
Fever is often the first and most reliable indicator of EHV-1 infection. It usually appears before any neurologic symptoms. Horses may also show:
• Lethargy
• Inappetence
• Nasal discharge
• Hind end weakness or incoordination in severe cases
👉 Take temperatures twice daily - this is your best early warning tool.
🔹 Clinic Recommendations
• Minimize travel and avoid unnecessary mixing of horses
• Don’t share tack, buckets, grooming tools, or tie areas
• Disinfect anything that moves between horses
• Isolate new, returning, or sick horses for 14 - 21 days
• Keep vaccines current (they don’t prevent EHM, but may reduce severity + shedding)
🔹 Be Proactive
Before bringing service providers into your barn, ask your farrier, equine massage therapist, chiropractor, bodyworker, or trainer what biosecurity steps they’re taking.
Everyone entering your facility should have a plan to reduce the spread of disease.
🔹 Resources (as provided in the OCPV memo):
• Government of Alberta - https://www.alberta.ca/equine-herpesvirus-myeloencephalopathy
• Canadian Food Inspection Agency - https://inspection.canada.ca/en/animal-health/terrestrial-animals/diseases/other-diseases/equine-herpes-myeloencephalopathy
• Texas Animal Health Commission -https://www.tahc.texas.gov/news/brochures/TAHCFactSheet_EHM.pdf
•AAEP Guidelines for EHV-1 -https://aaep.org/wp-content/uploads/2021/02/Equine-Herpesvirus-EHV-1-and-EHV-4-Guidelines-final.pdf
If you’re concerned about symptoms or want to review your biosecurity plan, contact your veterinarian. Stay aware, stay prepared, and stay safe. 🐴💙
~ Cochrane Animal Clinic