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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- Neurologic
Olmstead County, MN
Outbreak Identifier: 4918
Alert ID: 2262
September 24, 2021
Confirmed Case(s) - Official Quarantine

Minnesota Board of Animal Health

Number Confirmed: 1;
Number Exposed: 38;
Facility Type: Boarding Facility;
Age: 24; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 9/21/2021;
Clinical Signs: Ataxia, Edema; Confirmation Date: 9/23/2021; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
Notes: The farm is currently under quarantine. For more information about EHM go to the EHM factsheet. 

West Nile Virus
Yuba County, CA
Outbreak Identifier: 4917
Alert ID: 2261
September 24, 2021
Confirmed Case(s) - No Quarantine

California Department of Food and Agriculture

Number Confirmed: 1;
Age: 14; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/20/2021;
Clinical Signs: Down in Lateral Recumbency, Muzzle/ear Fasciculations, Phases of Hyperexcitability; Confirmation Date: 9/23/2021; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
Notes: For more information about West Nile Virus go to WNV factsheet.;

Eastern Equine Encephalitis
District of Parry Sound, ON
Outbreak Identifier: 4916
Alert ID: 2260
September 24, 2021
Confirmed Case(s) - No Quarantine

Ontario Ministry of Agriculture and Food and Rural Affairs

Number Confirmed: 2;
Age: 12; Gender: Gelding; Breed: Not Reported; Onset of Clinical Signs: Not Reported;
Clinical Signs: Acute neurologic signs, Recumbent; Confirmation Date: 9/23/2021; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
 

Age: 4; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: Not Reported;
Clinical Signs: Depressed Nature, Dullness, Severe Ataxia; Confirmation Date: 9/23/2021; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
Notes: For more information about Eastern Equine Encephalitis go to the EEE factsheet. 

West Nile Virus
El Paso and Logan County, CO
Alert ID: 2259
September 24, 2021
Confirmed Case(s) - No Quarantine

Colorado State Veterinarian

El Paso
Number Confirmed:1;
Number Exposed: 7;

of Clinical Signs: 9/20/2021;
Clinical Signs: Not Reported; Confirmation Date: 9/23/2021;

 

Logan County
Number Confirmed: 1;
Confirmation Date: 9/22/2021;
Notes: For more information about West Nile Virus go to WNV factsheet.;

Equine Herpesvirus- Neurologic
Ottawa Region, ON
Outbreak Identifier: 4913
Alert ID: 2258
September 23, 2021
Confirmed Case(s) - Voluntary Quarantine

Ontario Ministry of Agriculture and Food and Rural Affairs

Number Confirmed: 1;
Facility Type: Boarding Facility;
Age: 25; Gender: Mare; Breed: Not Reported; Onset of Clinical Signs: 9/19/2021;
Clinical Signs: Severe ataxia progressing to recumbency ; Confirmation Date: 9/23/2021; Horse Status: Euthanized; Vaccination Status: Vaccinated;
Notes: OMAFRA was notified on September 23, 2021 regarding a positive test result for EHV-1 from a mare that was euthanized on September 20 due to acute neurologic disease. The mare was located at a boarding facility in the Ottawa region. The facility owner voluntarily implemented movement restrictions on September 17, 2021 after a different mare was referred to a veterinary facility in another province for assessment and treatment of ataxia. The boarding facility is under veterinary supervision. At this time, no other horses have shown clinical signs related to EHV-1 infection. For more information about EHM go to the EHM factsheet.

Equine Infectious Anemia
Saddle Lake, AB
Outbreak Identifier: 4912
Alert ID: 2257
September 22, 2021
Confirmed Case(s) - No Quarantine

Canadian Animal Health Surveillance System

Number Confirmed: 1;
Notes: On September 17, 2021, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for a horse located on a premises in Saddle Lake, Alberta. The horse had been tested by an accredited veterinarian at the owner’s request because it was exhibiting clinical signs compatible with EIA infection. A CFIA investigation is underway and as per program policy, movement controls have been placed on the infected horse and any on-premises contact animals. Initial reports indicate there are other equines on the affected premises. Movement controls will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of confirmed cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current policy. Improved biosecurity protocols have been strongly recommended to the owners to help control the ongoing spread of EIA and protect our national herd.

West Nile Virus
Garfield County, OK
Outbreak Identifier: 4911
Alert ID: 2256
September 22, 2021
Confirmed Case(s) - No Quarantine

Oklahoma State Veterinary Office

Number Confirmed: 1;
Facility Type: Farm;
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: Not Reported;
Clinical Signs: Depression, lethargy; Confirmation Date: 9/17/2021; Horse Status: Recovering; Vaccination Status: Status Unknown;
Notes: For more information about West Nile Virus go to the WNV factsheet.;

Strangles
Alpena County, MI
Outbreak Identifier: 4910
Alert ID: 2255
September 22, 2021
Confirmed Case(s) - Voluntary Quarantine

Michigan Department of Agriculture and Rural Development

Number Confirmed: 1;
Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/10/2021;
Clinical Signs: Abscess, Nasal Discharge; Confirmation Date: 9/20/2021; Horse Status: Recovering; Vaccination Status: Unvaccinated;
Notes: For more information about Strangles go to the Strangles factsheet. 

West Nile Virus
Colleton County, SC
Outbreak Identifier: 4909
Alert ID: 2254
September 22, 2021
Confirmed Case(s) - No Quarantine

Clemson Livestock Poultry Health

Number Confirmed: 1;
Age: Yearling; Gender: Mare; Breed: Appaloosa; Horse Status: Recovering; Vaccination Status: Unvaccinated;
Notes: This is the third case of West Nile Virus in South Carolina for 2021. For more information about West Nile Virus go to the WNV factsheet.;

West Nile Virus
Amador and Stanislaus County, CA
Outbreak Identifier: 4907
Alert ID: 2253
September 21, 2021
Confirmed Case(s) - No Quarantine

California Department of Food and Agriculture

Amador County
Number Confirmed:
1;
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/15/2021;
Clinical Signs: Muscle Fasciculations, Severe Ataxia, Hyperreactive to light; Confirmation Date: 9/20/2021; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
 

Stanislaus County
Number Confirmed: 
1;
Age: 7; Gender: Mare; Breed: Pony; Onset of Clinical Signs: 9/11/2021;
Clinical Signs: Febrile, Mild Ataxia, Muscle Fasciculations of head and neck, Lower Lip Dropping, Hyperreactive to touch and movement; Confirmation Date: 9/20/2021; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;
Notes: For more information about West Nile Virus go to the WNV factsheet.;