11/20/2025
Equine Herpesvirus (EHV-1) Update — What Horse Owners Need to Know
There has been a significant amount of confusion circulating recently, so I wanted to provide a clear and accurate update about the current EHV-1 situation, what it actually means, and how horse owners can stay informed without unnecessary alarm.
-What EHV-1 / EHM Is
Equine Herpesvirus-1 is not a new disease. Most adult horses have been exposed to EHV at some point, typically resulting in respiratory signs such as fever and nasal discharge.
The concern with this outbreak involves the neurologic form, EHM (Equine Herpes Myeloencephalopathy), which occurs less frequently but can be severe. Neurologic cases require strict containment due to the potential for rapid progression and significant complications. This is why this particular outbreak is receiving heightened attention.
-Where the Confirmed Cases Are
As of today, confirmed cases associated with this outbreak have been reported in:
• Texas
• Oklahoma
• Louisiana
EHV can spread through horse movement, shared equipment, and close contact, remaining informed and cautious is important.
-Symptoms to Be Aware Of
• Fever
• Nasal discharge
• Lethargy
• Hind-end weakness
• Incoordination
• Difficulty standing
• Loss of tail tone
• Difficulty urinating
Neurologic signs require immediate veterinary evaluation.
-Recommended Precautions
Panic is not necessary, but intention and caution are important:
• Avoid hauling unless it is essential
• Limit contact with unfamiliar horses
• Do not share tack, grooming tools, buckets, or halters
• Wash hands and change clothes when transitioning between barns
• Disinfect equipment that travels off property
• Monitor temperatures in horses that appear unwell
• Isolate any horse returning from events for 14 days
These precautions are beneficial year-round.
-Vaccination Importance
While vaccination does not prevent the neurologic form of EHV, it plays a critical role in:
• Reducing the severity of illness
• Reducing viral shedding
• Supporting overall barn biosecurity
• Protecting against common respiratory forms of EHV
My own horses are fully vaccinated, including Flu/EHV boosters, PHF boosters, and all core vaccines. Staying up to date on vaccinations is an essential part of responsible horse care, especially during increased disease activity.
-Reliable Resources for Updates
Here are trustworthy sources for real-time, veterinary-supported information:
• USDA APHIS EHV Information
https://www.aphis.usda.gov/livestock-poultry-disease/equine/herpesvirus
• Equine Disease Communication Center – EHV Overview
https://www.equinediseasecc.org/equine-herpesvirus
• Equine Disease Communication Center – Alerts
https://www.equinediseasecc.org/alerts
I recommend checking these resources rather than relying on social media speculation.
I am located in Virginia, and at this time there are no confirmed cases related to this outbreak in my state. I am remaining cautious, informed, and proactive. With reasonable precautions and appropriate vaccination practices, the risk to most horses remains low.
Staying educated and making calm, informed decisions is the best way to protect our horses and our barns.
