Disease Alerts

Number Confirmed: 1; 
Number Exposed: 60; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 13; Gender: Gelding; Breed: Warmblood (WB); Usage: Horse Show; Onset of Clinical Signs: 1/13/2026; Clinical Signs: Mild nasal discharge, low-grade fever, mild lethargy, cough; Confirmation Date: 1/15/2026; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;

Number Confirmed: 1; 
Number Exposed: 1; 

Horse 1: 
Age: 4; Gender: Mare; Breed: Quarter Horse (QH); Clinical Signs: weakness, anemia; Horse Status: Deceased; 

Comments: A 4–year–old Quarter Horse mare in Merced County was confirmed positive for Equine Infectious Anemia (EIA). One (1) potentially exposed horse on the home premises has been tested for EIA with results pending. The one potentially exposed horse will remain under quarantine until pending lab results are received and their sixty (60) day retest sample is completed as per CDFA and USDA program requirements. CDFA has been on site with continued monitoring of the situation, and epidemiological tracing is ongoing.;

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

Horse 1: 
Age: 11; Gender: Gelding; Breed: Appaloosa; Onset of Clinical Signs: 1/12/2026; Clinical Signs: nasal discharge, swollen lymph nodes; Confirmation Date: 1/19/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Number Confirmed: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 16; Gender: Gelding; Breed: Miniature Horse; Onset of Clinical Signs: 1/12/2026; Confirmation Date: 1/15/2026; Horse Status: Quarantined; Vaccination Status: Status Unknown;

Number Confirmed: 2; 

Horse 1: 
Age: 15; Gender: Gelding; Onset of Clinical Signs: 12/30/2025; Clinical Signs: Fever, Cough; Confirmation Date: 1/5/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Comments: Farm had an outbreak of Strangles in early October of 2025, which was reported under Alert 4648 and included one confirmed case and 3 other suspected cases. Had a voluntary quarantine placed and released by the primary care veterinarian. Then, in late December, horses began to exhibit strangles signs. This horse and the horse reported under alert 4828 were subsequently confirmed positive for strangles.; 
Previous Alerts: 4828

Number Confirmed: 3; 
Number Exposed: 11; 
Number Euthanized: 3; 

Horse 1: 
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Usage: Racing; Onset of Clinical Signs: 12/16/2025; Clinical Signs: tested dur to exposure of another positive horse on the premises.; Confirmation Date: 12/23/2025; Horse Status: Euthanized; 

Horse 2: 
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Horse Status: Euthanized; 

Horse 3: 
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Onset of Clinical Signs: 12/16/2025; Clinical Signs: tested due to exposure to positive EIA horse.; Confirmation Date: 12/23/2025; Horse Status: Affected And Alive; 

Previous Alerts: 4816

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

Horse 1: 
Age: 13; Gender: Mare; Breed: Pony; Usage: Pleasure Riding; Clinical Signs: Neurological signs; Confirmation Date: 1/8/2026; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Comments: The two Geauga county cases are unrelated and not epidemiologically linked.;

Number Confirmed: 1; 
Number Exposed: 28; 
Number Euthanized: 1; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 15; Gender: Mare; Breed: Standardbred; Usage: Breeding; Clinical Signs: Acutely down, neurologic; Confirmation Date: 1/9/2026; Horse Status: Euthanized; Vaccination Status: Status Unknown;

Comments: The two Geauga county cases are unrelated and not epidemiologically linked.;

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 10; 
Facility Type: Private Facility; 
Comments: Strangles was confirmed by PCR.;

Comments: The quarantine for EHM is released.; 
Previous Alerts: 4809