Multiple states have reported EHV-1/EHM cases, including Louisiana, Oklahoma and Texas since the November 20th event. Because exposed horses might not show clinical signs immediately, more cases are likely over the next two weeks as testing continues nationwide.
To help owners and the public understand the evolving situation and reduce spread, the University of Missouri’s equine internal medicine veterinarians break down the essential facts and the most effective steps horse owners can take right now.
Source: University of Missouri, November 20, 2025. Link. EHV-1/EHM is a reportable disease, meaning veterinarians must notify the state veterinarian’s office when a case is confirmed, and positive horses must remain in strict isolation following state guidelines.
Image: Link.