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

Olmstead County, MN

Outbreak Identifier: 4918

Alert ID: 2262

September 24, 2021

Confirmed Case(s) - Official Quarantine

Source: Minnesota Board of Animal Health

Number Confirmed: 1;
Number Exposed: 38;
Facility Type: Boarding Facility;
Age: 24; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 9/21/2021;
Clinical Signs: Ataxia, Edema; Confirmation Date: 9/23/2021; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
Notes: The farm is currently under quarantine. This horse also has cervical spinal cord compression due to pathologic vertebral changes that would also be consistent with causing neurologic signs observed. For more information about EHM go to the EHM factsheet.

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