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Disease Alerts

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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Weld County, CO
Alert ID: 532
May 23, 2017

State Veterinarian's Office, Colorado

This is a summary and clarification of horses recently diagnosed with EIA in Colorado. On May 2, 2017, 9 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 9 horse tested positive for EIA and were euthanized. The remaining 15 horses were quarantined at that barn for sixty days when they will be retested for EIA and Piroplasmosis.  On May 12, 2017 nine more horses at a second premises in Weld County, that were epidemiologically linked to the original three positive EIA horses on the first premises, were tested.  An additional three horses on the second premises tested positive for EIA and were euthanized. The remaining six horses on the second premises were quarantined for 60 days when they will be retested for EIA. Currently there are 15 horses quarantined at the initial premises and 6 horses at the second premises pending retesting for EIA.