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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.



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Equine Infectious Anemia
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. 
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