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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.


    

West Nile Virus
Yakima County, WA
Outbreak Identifier: 4778
Alert ID: 2140
July 26, 2021
Confirmed Case(s) - No Quarantine

Washington State Veterinary Office

Number Confirmed: 1;
Facility Type: Private Facility;
Horse Status: Euthanized; Vaccination Status: Status Unknown;
Notes: A horse at a private facility in Yakima County has tested positive for West Nile Virus.

Equine Herpesvirus- Neurologic
Sonoma County, CA
Outbreak Identifier: 4776
Alert ID: 2139
July 25, 2021
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 5;
Number Suspected: 4;
Number Exposed: 19
Facility Type: Showgrounds;
Horse #1: Age: 6; Gender: Mare; Breed: Warmblood (WB); Onset of Clinical Signs: 7/23/2021;
Clinical Signs: Hind-end Weakness, Limb edema, Nystagmus, Recumbency; Confirmation Date: 7/24/2021; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Horse #2: Age: 15; Gender: Gelding; Breed: Warmblood (WB); Onset of Clinical Signs: 7/22/2021;
Clinical Signs: Ataxia, Cranial Nerve Deficit, Fever, Neurologic Signs, Urine Dribbling; Confirmation Date: 7/23/2021; Horse Status: Affected And Alive; Vaccination Status: Status Unknow

Notes: A 6-year-old Warmblood mare displaying neurological signs has been confirmed positive for EHM secondary to EHV-1. She attended a show in Sonoma County from 7/19-7/24 but did not compete, and event management has notified all participants to monitor temperatures twice daily and report any fevers or neurologic signs to their veterinarians and CDFA, as well as isolate all horses returning from shows at their home premises for at least 7 days. CDFA was onsite, and 19 exposed horses from the index mare’s barn were removed from the show facility and have been isolated and quarantined at the home premises in Sacramento County with the remaining 18 horses at the home premises with twice daily temperature monitoring and enhanced biosecurity measures. Six (6) horses from the home premises displaying fever and/or limb edema have also tested positive for EHV-1. A 15-year-old Warmblood gelding at the home premises that was febrile and tested positive for EHV-1 began displaying neurological signs, ataxia, urine dribbling, and cranial nerve deficits and was moved to isolation under quarantine at a veterinary hospital for care. CDFA continues to actively monitor the situation.;  For more information go to:  Equine Herpesvirus Myeloencephalopathy

Equine Herpesvirus- Neurologic
Owyhee County, ID
Outbreak Identifier: 4775
Alert ID: 2138
July 23, 2021
Confirmed Case(s) - Voluntary Quarantine

Idaho State Department of Agriculture

Number Confirmed: 1;
Number Exposed: 40;
Facility Type: Farm;
 Gender: Mare; Onset of Clinical Signs: 7/20/2021;
Clinical Signs: Recumbent, Unable to Stand;  Horse Status: Recovering; Vaccination Status: Not Reported;
Notes: The mare are was recumbent and unable to stand on 7/20/21. On 7/23, horse had recovered to the point of being able to stand and walk. No other horses on the property are demonstrating clinical symptoms. For more information go to:  EHV-1

Potomac Horse Fever
Hawkins, Robertson, Sullivan Counties, TN
Alert ID: 2137
July 23, 2021
Confirmed Case(s) - No Quarantine

Tennessee State Veterinarian

 

Hawkins County

Number Confirmed: 1;
Facility Type: Farm;
Vaccination Status: Not Reported;
Notes: None;

 

Robertson County

Number Confirmed: 1;
Facility Type: Farm;
Vaccination Status: Not Reported;
Notes: None;

 

Sullivan County

Number Confirmed: 1;
Facility Type: Farm;
Vaccination Status: Not Reported;
Notes: None;

Potomac Horse Fever
Norfolk County, MA
Outbreak Identifier: 4771
Alert ID: 2136
July 23, 2021
Confirmed Case(s) - No Quarantine

Massachusetts State Veterinary Office

Number Confirmed: 1;
Facility Type: Boarding Facility;
Clinical Signs: Fever, Inappetance, lethargy; Confirmation Date: 7/19/2021; Horse Status: Affected And Alive; 
Notes: A horse at a boarding facility in Norfolk County has tested positive for Potomac Horse Fever

Strangles
Middlesex, Hampden, Norfolk, Hampshire, Worcester, Franklin, Bristol and Plymouth County, MA
Alert ID: 2135
July 22, 2021
Information Only

Massachusetts State Veterinary Office

Middlesex County
Number Confirmed: 1;
Facility Type: Private Facility;
Clinical Signs: Signs developed after the horse had traveled to another premises in MA; Confirmation Date: 5/18/2021; Horse Status: Affected And Alive;
Notes: A horse at a private facility in Middlesex County has tested positive for Strangles. ;

Hampden County
Number Confirmed: 1;
Facility Type: Boarding Facility;
Clinical Signs: Signs developed after horse was purchased from another premises in MA; Confirmation Date: 5/27/2021; Horse Status: Affected And Alive;
Notes: A horse at a boarding facility in Hampden County has tested positive for Strangles. ;

Norfolk County
Number Confirmed: 1;
Facility Type: Boarding Facility;
Clinical Signs: Signs developed after horse was imported to the US; Confirmation Date: 5/30/2021; Horse Status: Affected And Alive;

Notes: A horse at a boarding facility in Norfolk County has tested positive for Strangles.;

Hampshire County
Number Suspected: 1;
Facility Type: Boarding Facility; Onset of Clinical Signs: 5/21/2021;

Worcester County
Number Confirmed: 1;
Facility Type: Private Facility;
Clinical Signs: Signs developed after caretaker visited another MA premises with Strangles.; Confirmation Date: 6/9/2021; Horse Status: Affected And Alive;
Notes: A horse at a private facility in Worcester County has tested positive for Strangles. ;

Franklin County
Number Confirmed: 2;
Facility Type: Private Facility;
Clinical Signs: Not Reported; Confirmation Date: 6/9/2021; Horse Status: Affected And Alive;
Notes:Two horses at a private facility in Franklin County have tested positive for Strangles. ;

Bristol County
Number Confirmed: 1;
Facility Type: Boarding Facility;
Clinical Signs: Not Reported; Confirmation Date: 6/11/2021; Horse Status: Affected And Alive;
Notes: A horse at a boarding facility in Bristol County has tested positive for Strangles. ;

Plymouth County
Number Confirmed: 1;
Facility Type: Boarding Facility;
Confirmation Date: 6/24/2021; Horse Status: Affected And Alive;
Notes: A horse at a boarding facility in Plymouth County has tested positive for Strangles. ;

Plymouth County
Number Confirmed: 1;
Number Suspected: 2;
Facility Type: Boarding Facility;
Confirmation Date: 7/5/2021; Horse Status: Affected And Alive;
Notes: A horse at a second boarding facility in Plymouth County has tested for Strangles.;

Strangles
Marion County, FL
Outbreak Identifier: 4770
Alert ID: 2134
July 22, 2021
Suspected Case - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 0;
Number Suspected: 1;
Facility Type: Boarding Facility;
Notes: This is the 32nd case of Strangles for Florida in 2021. For more information about Strangles go to the Strangles factsheet. 

Potomac Horse Fever
Frederick County, MD
Outbreak Identifier: 4759
Alert ID: 2133
July 21, 2021
Confirmed Case(s) - No Quarantine

Attending Veterinarian and State Veterinarian

Number Confirmed: 1;
Facility Type: Private Facility
Age: 4; Gender: Mare; Breed: Paint; Onset of Clinical Signs: 7/16/2021;
Clinical Signs: diarrhea, Fever; Confirmation Date: 7/20/2021; Horse Status: Recovering; Vaccination Status: Unvaccinated;
Notes: The mare is recovering well after several days of hospitalization. 

Strangles
Columbia County, FL
Outbreak Identifier: 4760
Alert ID: 2132
July 21, 2021
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1;
Number Exposed: 14;
Facility Type: Private Facility;
Notes: This is the 31st confirmed case of Strangles for Florida in 2021. For more information about Strangles go to the Strangles factsheet. 

Strangles
King County, WA
Outbreak Identifier: 4758
Alert ID: 2131
July 21, 2021
Confirmed Case(s) - Voluntary Quarantine

Washington State Veterinary Office

Number Confirmed: 1;
Number Suspected: 2;
Notes: A horse at a farm in King County has tested positive for Strangles. The owner is working with a veterinarian and practicing biosecurity recommendations. For more information about Strangles go to the Strangles factsheet.