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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.



Saline County, IL
Outbreak Identifier: 7319
Alert ID: 4866
February 04, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 15; 
Facility Type: Private Facility; 
Comments: In house PCR using the Fluxergy system. Patient has improved over 24 hours with supportive care. Horse is no longer at hospital and no horses were directly exposed during its stay at the hospita.;

Nye County, NV
Outbreak Identifier: 7318
Alert ID: 4865
February 03, 2026
Confirmed Case(s) - Official Quarantine

Nevada Department of Agriculture

Number Confirmed: 1; 
Comments: A quarantine has been issued for the facility and exposed horses.;

Kitsap County, WA
Outbreak Identifier: 7311
Alert ID: 4864
February 03, 2026
Confirmed Case(s) - Voluntary Quarantine

State Veterinarian Office and Attending Veterinarian

Number Confirmed: 1; 
Facility Type: Private Facility; 
Comments: Reported as EHV-4 on USAHA daily news. Might have clicked wrong button during submission or reported out to USAHA incorrectly; 
Previous Alerts: 4857

Dufferin County, ON
Outbreak Identifier: 7317
Alert ID: 4863
February 03, 2026
Confirmed Case(s) - Voluntary Quarantine

OMAFA

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

Horse 1: 
Age: 15; Gender: Gelding; Breed: Draft; Onset of Clinical Signs: 1/27/2026; Clinical Signs: This gelding developed clinical signs of a white discharge from both nostrils and a high fever. A new horse had been purchased two weeks prior to this horse developing signs. The new horse seemed "off" and was isolated just prior to this gelding becoming ill.; 

Comments: The facility owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal;;

United Counties of Stormont, Dundas and Glengarry, ON
Outbreak Identifier: 7316
Alert ID: 4862
February 03, 2026
Confirmed Case(s) - Voluntary Quarantine

OMAFA

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

Horse 1: 
Age: Suckling Foal; Gender: Filly; Breed: Draft-cross; Onset of Clinical Signs: 1/19/2026; Clinical Signs: A mare and its foal were bought from a sale a week prior to signs developing in the foal. The mare had mild and transient nasal discharge. Foal developed a fever, nasal discharge and abscessed lymph node, a sample from which was positive for S. equi.; 

Comments: The farm owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal;;

Weld County, CO
Outbreak Identifier: 7315
Alert ID: 4861
February 03, 2026
Confirmed Case(s) - Official Quarantine

State Veterinarian's Office

Number Confirmed: 4; 
Number Exposed: 18; 
Facility Type: Training Facility; 

Horse 1: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Clinical Signs: Tested due to exposure to positive; Confirmation Date: 1/29/2026; Horse Status: Quarantined; 

Horse 2: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Clinical Signs: Tested due to exposure to positive; Confirmation Date: 1/29/2026; Horse Status: Quarantined; 

Horse 3: 
Age: 12; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Clinical Signs: Tested due to exposure to positive; Confirmation Date: 1/29/2026; Horse Status: Quarantined; 

Horse 4: 
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Clinical Signs: Tested due to exposure to positive, but euthanized due to a lung abscess, poor response to IV antibiotic therapy and poor prognosis before results were received; Confirmation Date: 1/16/2026; Horse Status: Deceased; 

Comments: These horses were tested due to exposure to positives in cases #4837 and #4816; Both cases were in Adams County. 

Santa Rosa County, FL
Outbreak Identifier: 7314
Alert ID: 4860
January 31, 2026
Confirmed Case(s) - Official Quarantine

Florida Department of Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: 2; 
Facility Type: Private Facility; 
Comments: This is the second strangles confirmed premises for Florida in 2026. No horses have been on or off premises in previous 21+ days.;

Fort Bend County, TX
Outbreak Identifier: 7313
Alert ID: 4859
January 30, 2026
Confirmed Case(s) - Official Quarantine

Texas Animal Health Commission

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Comments: Quarantined 12/8/25. Quarantines will not be released until TAHC’s requirements are met. TAHC staff work closely with the owners and local veterinarians to monitor potentially exposed horses and implement biosecurity measures.;

Wilson County, TX
Outbreak Identifier: 7312
Alert ID: 4858
January 30, 2026
Confirmed Case(s) - No Quarantine

Texas Animal Health Commission

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Comments: Hold order placed on 12/4/25. Quarantines will not be released until TAHC’s requirements are met. TAHC staff work closely with the owners and local veterinarians to monitor potentially exposed horses and implement biosecurity measures.;

Kitsap County, WA
Outbreak Identifier: 7311
Alert ID: 4857
January 30, 2026
Confirmed Case(s) - Voluntary Quarantine

State Veterinarian Office and Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Under veterinary care. Mild upper resp signs. Had been to local riding club event.;