Outbreaks | Equine Disease Communication Center

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

Disease

Outbreak States

Start Date

End Date

Search by Alert ID

Search by Outbreak ID

Equine Herpesvirus- Neurologic

Montgomery County, TX

Outbreak Identifier: 7199

Alert ID: 4724

November 20, 2025

Confirmed Case(s) - Official Quarantine

Source: Attending Veterinarian

Number Confirmed: 2;
Number Exposed: Unknown;
Number Euthanized: 1;
Facility Type: Private Facility;

Horse 1:
Gender: Gelding; Breed: Quarter Horse (QH); Usage: Barrel Racing; Onset of Clinical Signs: 11/18/2025; Clinical Signs: Weak rear end Depression / Lethargy; Confirmation Date: 11/19/2025; Horse Status: Isolated; Vaccination Status: Status Unknown;

Horse 2:
Breed: Quarter Horse (QH); Clinical Signs: Neurologic signs; Horse Status: Euthanized;

Comments: Both cases are associated with the EHM outbreak that originated at the Women’s Professional Rodeo Association (WPRA) World Finals and Elite Barrel Race event.

For an up-to-date count of EHM cases tied to this outbreak, please visit HERE

Search for County

Disease Alerts