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Disease Alerts

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.


    

Equine Herpesvirus- Abortion
Regional Municipality of York, ON
Outbreak Identifier: 4647
Alert ID: 2029
April 09, 2021
Confirmed Case(s) - Voluntary Quarantine

Ontario Ministry of Agriculture and Food

Number Confirmed: 1;;
Facility Type: Farm;
Age: 23; Gender: Mare; Breed: Not Reported; Onset of Clinical Signs: 4/3/2021;
Confirmation Date: 4/7/2021; Horse Status: Affected And Alive; Vaccination Status: Not Reported;
Notes: Mare was aborted at 315 days of gestation.
The affected mare has been isolated on the property. No other mares are affected at this time. Under veterinary supervision, the facility manager has implemented biosecurity protocols and animal movement restrictions.

Equine Herpesvirus- Abortion
Pontotoc County, OK
Outbreak Identifier: 4619
Alert ID: 1993
March 16, 2021
Confirmed Case(s) - Official Quarantine

Oklahoma Department of Agriculture

Number Confirmed: 1;
Number Exposed: 3;
Facility Type: Private Facility;
Age: 8; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/9/2021;
Clinical Signs: Late term aborted foal found in the pasture during morning feeding. The mare has shown no clinical signs of illness.; Confirmation Date: 3/11/2021; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
Notes: Liver from the aborted foal was positive for EHV-1. Nasal swab and buffy coat for the mare were negative for EHV-1. The affected mare was pastured with 3 other equine. There are no shared fence lines with other horses. None of the equine have left the premises in the past 6 months. These equine were placed under a 21 day quarantine without testing and owner is monitoring closely for clinical signs of illness.

Equine Herpesvirus- Abortion
Dufferin County and Regional Municipality of York, ON
Alert ID: 1977
March 09, 2021
Confirmed Case(s) - Voluntary Quarantine

Ontario Ministry of Agriculture and Food

Dufferin County 
Number Confirmed:
1;
Facility Type: Boarding Facility;
Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 2/27/2021;
Clinical Signs: Aborted during 10th month of pregnancy; Confirmation Date: 3/2/2021; Horse Status: Recovering; Vaccination Status: Vaccinated;
Notes: The facility manager has placed the farm under voluntary movement restrictions for 21 days and staff have implemented heightened biosecurity protocols with veterinary supervision.;

Regional Municipality of York 
Number Confirmed:
1;
Facility Type: Private Facility;
Age: Not Reported; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 3/1/2021;
Clinical Signs: Foal was stillborn; Confirmation Date: 3/4/2021; Horse Status: Recovering; Vaccination Status: Vaccinated;
Notes: The farm manager has isolated the mare and implemented a voluntary 21 day movement restriction. Heightened biosecurity measures are in place and under the supervision of the farm veterinarian. ;

Equine Herpesvirus- Abortion
Jerauld County, SD
Outbreak Identifier: 4104
Alert ID: 1597
March 11, 2020
Confirmed Case(s) - No Quarantine

South Dakota Animal Industry Board

Number Confirmed: 1;
Number Exposed: 10;
Notes:
There have been 4 abortions (including the one test positive) in 10 unvaccinated broodmares.;

Equine Herpesvirus- Abortion
Simcoe County, ON
Outbreak Identifier: 4078
Alert ID: 1561
January 14, 2020
Suspected Case - Voluntary Quarantine

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.;

Equine Herpesvirus- Abortion
Sakastchewan, Canada
Alert ID: 1246
May 06, 2019
Information Only

Canadian Animal Health Surveillance System

Number Confirmed: 2;
Number Exposed: 22;

Age: 9; Gender: Mare; Clinical Signs: abortion; Confirmation Date: 4/9/2019; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Age: 14; Gender: Mare; Clinical Signs: abortion; Confirmation Date: 4/9/2019; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Notes: Saskatchewan: Abortions occurred in two mares (9 yr old and 14 yr old), from a group of 22 pregnant mares, described as an ‘open’ herd. Mares were not vaccinated. There is no respiratory disease present in this group of mares. One of the aborted fetuses tested positive for EHV-1 by PCR. The attending vet is overseeing and managing the case. Saskatchewan Agriculture monitors the occurrence of EHV-1 in the province, but does not respond to positive cases.;

 

Equine Herpesvirus- Abortion
Humboldt County, NV
Alert ID: 1239
May 01, 2019
Confirmed Case(s) - Voluntary Quarantine

Nevada State Veterinarian

Number Confirmed: 1;
Number Exposed: Not Reported;
Age: 9; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 4/11/2019;
Clinical Signs: abortion; Confirmation Date: Not Reported; Horse Status: Not Reported; Vaccination Status: Undervaccinated;
Notes: The Nevada State Veterinarian received confirmation April 30th that a 9 year old Quarter Horse mare aborted on April 11th due to EHV-1 non-neuropathogenic strain. The mare was under-vaccinated and had been exposed to horses on the premise that last traveled to a High School Rodeo March 8-10 in Nevada. The owner had self imposed a travel ban on the premise after a positive case was reported April 1st in Humboldt County associated with the same rodeo in early March. No additional quarantine has been placed on the premise based on the amount of time that has passed and the fact that the premise was under a self imposed travel ban. No other horses on the premise exhibited clinical signs of disease at any time