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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.



United Counties of Prescott and Russell, ON
Outbreak Identifier: 6274
Alert ID: 3746
June 12, 2024
Confirmed Case(s) - Voluntary Quarantine

OMAFRA

Number Confirmed: 1; 
Number Exposed: 2; 
Facility Type: Private Facility; 

Horse 1: 
Age: Yearling; Gender: Filly; Breed: Standardbred; Clinical Signs: This filly develop parotid, submandibular and peri-rectal abscesses that were confirmed positive for S. equi. This filly arrived from another Ontario farm in November 2023.; Confirmation Date: 6/6/2024; 

Comments: The farm owner is working with their veterinarian on voluntary movement restrictions and infection control measures.;

Peterborough County, ON
Outbreak Identifier: 6273
Alert ID: 3745
June 12, 2024
Confirmed Case(s) - Voluntary Quarantine

OMAFRA

Number Confirmed: 5; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: The farm owner is working with their veterinarian to voluntarily restrict movement and implement infection control measures.;

Jackson County, FL
Outbreak Identifier: 6272
Alert ID: 3744
June 07, 2024
Confirmed Case(s) - No Quarantine

FDACS Veterinary Medical Officer

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

Horse 1: 
Age: 10; Gender: Mare; Breed: Miniature Horse; Onset of Clinical Signs: 5/30/2024; Clinical Signs: Depression, fever, inability to stand, muscle twitching; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Comments: This is Florida's 9th EEE for 2024;

Ulster County, NY
Outbreak Identifier: 6271
Alert ID: 3743
June 07, 2024
Confirmed Case(s) - Official Quarantine

NYS Department of Agriculture and Markets, Division of Animal Industry

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Showgrounds; 
Comments: Please see Disease Advisory from HITS Saugerties. All exposed horses have been quarantined and are being carefully monitored at this time. https://www.hitsshows.com/hits-hudson-valley-official-update-ehv-1/;

Spokane County, WA
Outbreak Identifier: 6270
Alert ID: 3742
June 07, 2024
Confirmed Case(s) - Voluntary Quarantine

State Veterinarian Office.

Number Confirmed: 2; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 
Comments: Animals under vet care and quarantine management since middle of May.;

Orange County, FL
Outbreak Identifier: 6263
Alert ID: 3741
June 05, 2024
Confirmed Case(s) - Official Quarantine

Number Confirmed: 2; 
Number Exposed: 3; 
Comments: On May 23, 2024, the National Veterinary Services Laboratories (NVSL) in Ames, Iowa, reported confirmation by bacterial culture a positive case of Taylorella equigenitalis, the causative agent of contagious equine metritis (CEM), in an 11-year-old domestic pony mare in central Florida. The mare had been bred by live cover on May 10th to a 4-year-old pony stallion. After breeding, the mare had retained free fluid in her uterus and was treated by uterine lavage on May 13th. The uterine fluid was collected and sent for routine bacterial culture, which ultimately yielded the confirmed positive results for T. equigenitalis. On May 31, 2024, NVSL confirmed the 4-year-old pony stallion positive for T. equigenitalis on bacterial culture. Banked serum samples were used to conduct pre- and post-exposure complement fixation testing (CFT) on the pony mare which confirm the pony stallion as the source of her infection. The affected mare and stallion are both being held under state quarantine in Florida. Four other potentially exposed ponies on the premises (3 stallions, 1 mare) have been sampled for testing at NVSL with results pending. Traceback and epidemiological investigation is ongoing and additional updates will be posted as they become available. 

For more information, go to https://www.aphis.usda.gov/livestock-poultry-disease/equine/contagious-equine-metritis
Previous Alerts: 3732

Hillsborough County, FL
Outbreak Identifier: 6269
Alert ID: 3739
June 05, 2024
Confirmed Case(s) - No Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Exposed: Unknown; 
Number Euthanized: 1; 

Horse 1: 
Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 5/26/2024; Clinical Signs: Neurological; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

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

Martin County, FL
Outbreak Identifier: 6268
Alert ID: 3738
June 05, 2024
Confirmed Case(s) - No Quarantine

FDACS Veterinary Medical Officer

Number Confirmed: 1; 
Number Exposed: Unknown; 
Number Euthanized: 1; 

Horse 1: 
Age: 1; Gender: Stallion; Breed: Quarter Horse (QH); Onset of Clinical Signs: 5/27/2024; Clinical Signs: Depression, elevated temperature, aimless wandering, weakness in hind legs; Confirmation Date: 6/5/2024; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Comments: This is Florida's 8th case of EEE for 2024;

Lancaster County, PA
Outbreak Identifier: 6267
Alert ID: 3737
June 03, 2024
Confirmed Case(s) - Official Quarantine

Pennsylvania Department of Agriculture

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 8; 
Number Euthanized: 1; 
Facility Type: Farm;

Montérégie, QC
Outbreak Identifier: 6266
Alert ID: 3736
May 31, 2024
Confirmed Case(s) - Voluntary Quarantine

MAPAQ

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

Horse 1: 
Age: 21; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 5/18/2024; Clinical Signs: proprioceptive ataxia of the 4 limbs quite severe to the hind limbs with decreased tail tone and bladder atony, vestibular syndrome with tilted head and involvement of the facial nerve, horizontal ocular nystagmus; Confirmation Date: 5/21/2024; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Horse 2: 
Onset of Clinical Signs: 5/20/2024; Clinical Signs: Lethargy; Confirmation Date: 5/23/2024; Horse Status: Recovering; Vaccination Status: Status Unknown;

Comments: No additional cases in the stable.;