Earlier this month the Colorado Department of Agriculture (CDA) quarantined a Weld County facility after a horse residing there tested positive for equine infections anemia (EIA). Now, additional horses have tested positive for EIA, as well.

On May 4 the CDA’s State Veterinarian’s Office received notice of the positive test from the USDA National Veterinary Services Laboratory. The index horse was euthanized following the positive test. At the time, the CDA placed the horse’s home facility under a quarantine order restricting the movement of other horses until further testing was completed.

On May 23, the Equine Disease Communication Center shared an update from the CDA that states:

"This is a summary and clarification of horses recently diagnosed with EIA in Colorado. On May 2, 2017, nine of 18 horses at a Weld County premises were tested for EIA and piroplasmosis for entry into sanctioned racetracks. One horse tested positive for EIA and was euthanized and subsequently an additional nine cohort horses were tested. Two of these additional nine horse tested positive for EIA and were euthanized. The remaining 15 horses were quarantined at that barn for 60 days when they will be retested for EIA and Piroplasmosis

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