ALERT Equine Herpesvirus (EHV-1)


Positive Case of Equine Herpesvirus Confirmed in Quebec

On Feb. 22, 2021, the Canadian Animal Health Surveillance System (CAHSS) confirmed a positive case of equine herpesvirus-1 (EHV-1) in Quebec as reported on Feb. 12, 2021, by Ministère de l’Agriculture, des Pêcheries et de l’Alimentation du Québec (MAPAQ).


The full disease advisory can be found here (available in French only). Additional details on EVH-1 can be found here.


An Ontario private equine facility euthanized three horses due to neurologic problems and had two additional horses confirmed with EHV-1.

On February 4, 2021, the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) was notified of two confirmed cases of equine herpesvirus-1 (EHV-1) infection at a private equine facility in the Regional Municipality of Halton. Both horses had a fever and were tested as part of a follow-up investigation into the deaths of three horses at the facility. The three horses had been euthanized between January 29-February 3 following sudden onset of sever incoordination and being down and unable to rise.


For more information about EHV-1 visit this page.


What is equine herpes virus and EHV-1?

Equine herpes virus is a common virus that occurs in horse populations worldwide. One of the virus’ most common strains is equine herpes virus type 1 (EHV-1) that’s known to cause respiratory diseases as well as outbreaks of abortions and neurologic disease. Western College of Veterinary Medicine


CURRENT EQUINE DISEASE OUTBREAK ALERTS AND INFORMATION - Canadian Animal Health Surveillance System (CAHSS) Equine Surveillance Network


Equine Disease Communication Center

The Equine Disease Communication Center (EDCC) is a US industry-driven initiative which works to protect horses and the horse industry from the threat of infectious diseases in North America. It provides information about cases of equine infectious diseases in the US, and includes some Canadian reports.

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