Equine Infectious Anemia

The Colorado Department of Agriculture’s State Veterinarian’s Office is announcing a confirmation of a horse in Adams County positive for both Equine Infectious Anemia (EIA) and Equine Piroplasmosis. The initial positive was identified on December 8 during routine testing for movement, underscoring the necessity of Coggins testing for transport requirements. Confirmatory testing was completed at the USDA’s National Veterinary Services Laboratory (NVSL) on December 23, 2025. 

The Colorado Department of Agriculture (CDA) State Veterinarian’s Office was notified on March 28, 2023 that a horse residing in Garfield County had tested presumptive positive for Equine Infectious Anemia (EIA)

The Colorado State Veterinarian’s Office has received confirmation that a horse in Pueblo County tested positive for Equine Infectious Anemia (EIA). Samples from the horse initially tested positive at the Colorado State University Veterinary Diagnostic Laboratory on June 2, 2022. A second sample was collected and the EIA-positive results were confirmed by the USDA’s National Veterinary Services Laboratory on June 14, 2022.