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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.



Brevard County, FL
Outbreak Identifier: 6597
Alert ID: 4067
October 22, 2024
Confirmed Case(s) - No Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 

Horse 1: 
Age: 4; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/10/2024; Clinical Signs: Muscle twitching, incoordination and Weakness in hind limbs.; Confirmation Date: 10/18/2024; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: This is Florida's 7th confirmed case of WNV for 2024;

Crittenden County, KY
Outbreak Identifier: 6592
Alert ID: 4063
October 18, 2024
Confirmed Case(s) - No Quarantine

Kentucky Department of Agriculture

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 

Horse 1: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 10/15/2024; Clinical Signs: Lethargic, Muscle Fasciculation (Face/Shoulder); Confirmation Date: 10/18/2024; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: This is Kentucky's 8th West Nile Virus equine confirmed this calendar year;

District of Thunder Bay, ON
Outbreak Identifier: 6589
Alert ID: 4058
October 15, 2024
Confirmed Case(s) - No Quarantine

OMAFA

Number Confirmed: 1; 
Number Exposed: 1; 

Horse 1: 
Gender: Gelding; Clinical Signs: This gelding was noted to be "not quite right" by the owner a few days before he was examined by the veterinarian on September 23rd who diagnosed a low grade fever, muscle fasciculations of the triceps muscle and sore front feet. Upon re-examination a few days later, he was noted to have twitching of the lower lip and ataxia. He has since recovered.; Confirmation Date: 10/10/2024; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Comments: This is the 9th equine case of WNV in Ontario this year. To see past and present WNV cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal. To see past and present WNV cases in Canada, go to: https://cahss.ca/cahss-networks/equine and enter the equine dashboard.;

LaGrange County, IN
Outbreak Identifier: 6588
Alert ID: 4057
October 12, 2024
Confirmed Case(s) - No Quarantine

Indiana State Board of Animal Health

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 

Horse 1: 
Age: 2; Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 9/23/2024; Clinical Signs: Ataxia, muscle tremors, grand mal seizure; Confirmation Date: 10/8/2024; Horse Status: Unknown; Vaccination Status: Unvaccinated;

Dufferin County, ON
Outbreak Identifier: 6587
Alert ID: 4056
October 11, 2024
Confirmed Case(s) - No Quarantine

OMAFA

Number Confirmed: 2; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Gender: Mare; Breed: Paint; Onset of Clinical Signs: 9/29/2024; Clinical Signs: Two mares that shared a paddock developed ataxia on September 29. One mare was also hyperaesthetic and had twitching of the muzzle.; Confirmation Date: 10/10/2024; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Comments: These are the 7th and 8th equine cases of WNV in Ontario this year. To see past and present WNV cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal. To see past and present WNV cases in Canada, go to: https://cahss.ca/cahss-networks/equine and enter the equine dashboard.;

Tehama County, CA
Outbreak Identifier: 6585
Alert ID: 4053
October 11, 2024
Confirmed Case(s) - No Quarantine

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/4/2024; Clinical Signs: ataxia, lethargy; Confirmation Date: 10/10/2024; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: The seventh (7th) case of West Nile Virus in California in 2024 was confirmed in Tehama County. On October 10, 2024, a 3-year-old Quarter Horse mare with an unknown vaccine history in Tehama County displaying neurologic signs was confirmed positive for West Nile Virus. The mare is alive and recovering.;

Washington County, PA
Outbreak Identifier: 6577
Alert ID: 4046
October 10, 2024
Confirmed Case(s) - No Quarantine

Pennsylvania Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Comments: Unvaccinated. Recumbent, unable to rise.;

Gaston County, NC
Outbreak Identifier: 6569
Alert ID: 4039
October 09, 2024
Confirmed Case(s) - No Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Exposed: 3; 
Facility Type: Farm; 

Horse 1: 
Age: 9; Gender: Gelding; Breed: Thoroughbred (TB); Usage: Trail Riding; Onset of Clinical Signs: 8/13/2024; Clinical Signs: ataxia, lethargy, fever, inappetence, lip twitching; Confirmation Date: 8/30/2024; Horse Status: Recovered; Vaccination Status: Unvaccinated;

Iowa County, WI
Outbreak Identifier: 6566
Alert ID: 4037
October 09, 2024
Confirmed Case(s) - No Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: 10; 

Horse 1: 
Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/30/2024; Clinical Signs: Hind limb ataxia; Confirmation Date: 10/8/2024; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Marion County, FL
Outbreak Identifier: 6562
Alert ID: 4033
October 09, 2024
Confirmed Case(s) - No Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 

Horse 1: 
Age: 4; Gender: Stallion; Breed: Paso Fino; Onset of Clinical Signs: 10/2/2024; Clinical Signs: Depression, elevated temperature, head shaking, muscle twitching, incoordination, weakness of hind limbs.; Confirmation Date: 10/9/2024; Horse Status: Recovering; Vaccination Status: Status Unknown;

Comments: This is the 6th confirmed case in Florida for 2024;