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Equine Herpesvirus Myeloencephalopathy (EHM) Outbreak
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Disease Alerts

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.



Rock County, WI
Outbreak Identifier: 6060
Alert ID: 3509
November 29, 2023
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: 20; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 16; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 11/15/2023; Clinical Signs: Respiratory symptoms, nasal discharge, T=101.5, cough, golf ball size swelling under jaw; Confirmation Date: 11/22/2023; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;