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- Abortion

Simcoe County, ON

Outbreak Identifier: 4078

Alert ID: 1561

January 14, 2020

Confirmed Case(s) - Voluntary Quarantine

Source: Ontario Ministry of Agriculture, Food and Rural Affairs

Number Confirmed: 2;
Notes: On January 6th, 2020 OMAFRA was notified of two cases of equine abortion in Simcoe County. Both cases were confirmed to be caused by equine herpesvirus-1 (EHV-1). Both mares aborted during their 10th month of pregnancy and both arrived from an out of province location in December. A third mare was exposed to the infected mares but has remained unaffected. The farm manager was proactive and kept the new mares separate from the resident mares and in a small group. This type of management procedure reduces the risk of spreading the virus to the entire herd. Working with their veterinarian, the farm manager has isolated the affected mares and has voluntarily placed the premises under quarantine to reduce the risk of viral spread.;

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