12/01/2025
🚨 NEW ARIZONA EHV-1 NEURO CASE (11/30/25) 🚨
A neurologic case of EHV-1 has been confirmed in Pinal County. The facility is under official quarantine, and there is no known link to previous Arizona, Texas, or Oklahoma cases.
Even though this is a single case, now is the time to stay extra alert. Some horses only spike very low-grade fevers, so don’t rely on obvious symptoms.
✔ Check temps twice daily
✔ Isolate any horse with a fever, even mild ones
✔ Use good biosecurity and limit unnecessary movement
We’ll continue to monitor updates closely and will keep everyone informed as new information becomes available.
Stay safe
Equine herpesvirus (EHV) is a family of equine viruses named by numbers including EHV-1, 2, 3, 4 and 5 with EHV-1,3,4 posing the most risk for domestic horses. EHV is a common DNA virus that occurs in horse populations worldwide. The two most common species are EHV-1 and EHV-4.