Disease Alerts

Number Confirmed: 1; 
Number Exposed: 4; 
Facility Type: Private Facility; 

Horse 1: 
Age: 15; Gender: Mare; Breed: Quarter Horse (QH); Usage: Rescue; Onset of Clinical Signs: 3/6/2026; Clinical Signs: Bilateral nasal discharge. Exposed to horses with strangles at previous premises; Confirmation Date: 3/23/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: Horse came from a local rescue that has a long history of transporting equines with strangles and other respiratory diseases.;

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Purchased at Billings horse sale. Under vet care. Recovering;

Number Confirmed: 10; 
Number Exposed: 25; 
Number Euthanized: 1; 
Facility Type: Private Facility; 
Comments: Quarantine was released on March 21.; 
Previous Alerts: 4905, 4904

Number Confirmed: 1; 
Number Exposed: 3; 
Number Euthanized: 1; 
Comments: No additional case were confirmed during the quarantine monitoring period. The quarantine period has been fully completed and is officially released.; 
Previous Alerts: 4898

Number Confirmed: 1; 
Number Exposed: 8; 
Number Euthanized: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 2; Breed: Quarter Horse (QH); Onset of Clinical Signs: 3/17/2026; Clinical Signs: Respiratory distress; Confirmation Date: 3/20/2026; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Comments: This is the fifth confirmed case of strangles for Florida in 2026.;

Number Confirmed: 2; 
Number Exposed: 25; 

Horse 1: 
Age: 7; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 3/19/2026; 

Horse 2: 
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 3/19/2026; 

Comments: A 7–year–old Quarter Horse gelding and an 8–year–old Quarter Horse gelding in Stanislaus County were confirmed positive for Equine Infectious Anemia (EIA). Twenty-five (25) potentially exposed horses on the home premises have been tested for EIA with results pending. The twenty-five (25) potentially exposed horses will remain under quarantine until pending lab results are received and their sixty (60) day retest samples are completed as per CDFA and USDA program requirements. CDFA has been on site with continued monitoring of the situation. Epidemiological tracing is ongoing, but transmission is suspected to be iatrogenic.;

Number Confirmed: 1; 
Number Exposed: 1; 
Comments: The one (1) potentially exposed horses on this premises tested negative on the sixty (60) day retest. Quarantine on this premises has been released.; 
Previous Alerts: 4842

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

Horse 1: 
Age: 3; Gender: Filly; Breed: Quarter Horse (QH); Clinical Signs: This filly had a fever for 4 days then developed purulent nasal discharge and lymph node enlargement under the jaw. She tested positive for Streptococcus equi by PCR (Strangles).; Horse Status: Recovering; 

Comments: 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;

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Comments: Quarantined 2/20/26. 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.;

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Comments: Quarantined 2/26/26. 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.;