Equine Infectious Anemia (EIA) Confirmed in Colorado

The Colorado Department of Agriculture (CDA) received presumptive positive Equine Infectious Anemia (EIA) test results on Friday, August 24, 2018 from the Rocky Mountain Regional Animal Health Laboratory.  An additional confirmatory ELISA was completed on Tuesday, August 28, 2018.

The horse arrived at a Weld County, Colorado premises from another state on July 18, 2018.  The horse did not have a negative EIA test or Certificate of Veterinary Inspection (CVI) prior to entering the state of Colorado.  CDA is working to confirm the traceback to the state of origin.

The initial EIA test for this horse was completed for movement into Wyoming.  The horse left the Weld County premises on August 20, 2018 with the EIA test still pending and no CVI, which violated Wyoming’s import requirements.  The horse was returned to Colorado on August 25, 2018 and was re-sampled for additional confirmatory testing on August 28, 2018.

The Colorado Department of Agriculture is currently working on tracing all of the horses that have been imported and exported from the Weld County premises since the arrival of the EIA-positive horse.  All horses exposed to the positive horse will be placed on a hold order until they have had an initial negative EIA test and 60-day negative EIA re-test.

Equine Infectious Anemia

Equine Infectious Anemia (EIA) is a viral disease spread by large biting insects (such as horse flies and deer flies), inappropriate use of needles, or other equipment used between susceptible equine animals such as horses, mules, and donkeys.  Infected horses may not appear to have any clinical signs of the disease, although it can cause high fever, weakness, weight loss, an enlarged spleen, anemia, weak pulse, and even death. There is no cure for the disease, so infected animals must be quarantined for life or euthanized.  EIA is not transmissible to people.

Equine Infectious Anemia is a disease for which horses must be tested annually before they can be transported across state lines.  The test for EIA is commonly called a Coggins Test.

For additional information on EIA, please visit the CDA Equine Infectious Anemia website.  EIA is a disease that is reportable to the Colorado Department of Agriculture, State Veterinarian’s Office.  Visit the CDA Livestock Health website for guidance on reportable diseases.