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

Gem County, ID

Outbreak Identifier: 5529

Alert ID: 2921

February 28, 2023

Confirmed Case(s) - Voluntary Quarantine

Source: State Veterinarian

Number Confirmed: 1;
Number Suspected: 6;
Number Exposed: 25;
Facility Type: Private Facility;
Comments: A mare at a private equine facility in Gem County aborted a pregnancy in late February. On February 27, 2023, the ISDA received laboratory confirmation the abortion was caused by EHV-1 (wild-type) infection, despite all horses on the property being current on all recommended vaccinations. In recent weeks, several other mares on the facility also either gave birth to weak foals or experienced an unexpected loss of pregnancy, but no diagnosis was confirmed. None of the horses on the property have had any recent movement on or off the premises. For more information go to: https://www.equinediseasecc.org/equine-herpesvirus

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