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

Callaway County, MO

Outbreak Identifier: 5984

Alert ID: 3426

October 19, 2023

Confirmed Case(s) - Voluntary Quarantine

Source: Attending Veterinarian

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

Horse 1:
Age: 18; Gender: Mare; Breed: Paint; Usage: Horse Show; Onset of Clinical Signs: 10/11/2023;
Clinical Signs: Ataxia, lethargy, hyporexia, urinary incontinence, paresis; Confirmation Date: 10/16/2023; Horse Status: Isolated; Vaccination Status: Vaccinated;

Comments: Mare's clinical progression became static with institution of treatment. Appetite returned. The horse that was exposed to this mare was tested for EHV-1 and EHV-4 by EDTA whole blood and nasal swab, and the results were negative. Facility implement voluntary quarantine of the facility, including temping all horses twice daily. Thus far, there are no other affected horses.;

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