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.

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Equine Herpesvirus- Neurologic

Waukesha County, WI

Outbreak Identifier: 7308

Alert ID: 4852

January 29, 2026

Confirmed Case(s) - Official Quarantine

Source: Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1;
Number Exposed: 45;
Number Euthanized: 1;
Facility Type: Private Facility;

Horse 1:
Age: 23; Gender: Gelding; Breed: Warmblood (WB); Onset of Clinical Signs: 1/26/2026; Clinical Signs: Acute onset neurologic signs; Confirmation Date: 1/28/2026; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Comments: Affected equine had no recent travel history;

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