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

Municipality of Wallace-Woodworth, MB

Outbreak Identifier: 4059

Alert ID: 1526

November 21, 2019

Confirmed Case(s) - Voluntary Quarantine

Source: Attending Veterinarian

Number Confirmed: 1;
Number Exposed: 86;
Age: 13; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 11/10/2019;
Clinical Signs: Ataxia, Recumbency, Unable to Rise; Confirmation Date: 11/14/2019; Horse Status: Euthanized; Vaccination Status: Vaccinated;
Notes: On Nov 8, 2019, a 7yo QH mare died less than 24 hours after acute onset of recumbency and inability to rise. On Nov 11, a 13 year old pregnant QH mare was euthanized on the same location due to advancing severity of neurological signs (first noticed on Nov 10) and was later confirmed positive by PCR for EHV-1. The mares were stabled with 38 other horses, and a total of 86 horses of various ages and genders are on site. The affected mares were vaccinated for the prevention of EHV-1 abortion approximately 1 week prior to onset of clinical signs and were approximately 5 months along in gestation. As of Nov 21, no new cases/symptoms have been reported on the site. A voluntary quarantine is in place, and to date there is no indication that EHM has spread from the affected premises.;

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