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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Strangles, Equine Herpesvirus- Respiratory, Equine Rhinitis Viruses

Sauk County, WI

Outbreak Identifier: 7398

Type: EHV-4

Alert ID: 4950

April 11, 2026

Confirmed Case(s) - Voluntary Quarantine

Source: Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1;
Number Exposed: 4;
Facility Type: Boarding Facility;

Horse 1:
Age: 5; Gender: Mare; Breed: Morgan; Onset of Clinical Signs: 4/7/2026; Clinical Signs: Mucoid nasal discharge, occasional cough, lymphadenopathy, fever, decreased appetite; Confirmation Date: 4/9/2026; Horse Status: Recovering; Vaccination Status: Vaccinated;

Comments: Also, PCR positive for EHV-4 and ERBV;

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