The affected horse has been isolated from the remaining horses on the Weld County facility. The exposed horses will be observed and retested in 60 days.
A horse that recently traveled from Colorado to Wyoming and back again has tested positive for equine infectious anemia (EIA), prompting the quarantine of 41 exposed Wyoming horses.
Veterinarians identified the positive horses, from Lamar County, through surveillance for an EIA trace initiated in another state.
The affected horse underwent testing to satisfy a pre-entry requirement for a particular premises. Initial reports indicate the horse has traveled extensively within Saskatchewan for training and competition.
The affected Dallas County Standardbred horse and McLennan County Quarter Horse have been euthanized and their home premises will remain under quarantine until requirements for release are met.
The EIA-positive horse will be euthanized, and animal health officials will conduct EIA tests on the remaining 42 equids on the index property.
The 16-year-old Quarter Horse mare from Kay County was euthanized.
Two Wilson County Quarter Horses, two Kaufman County Quarter Horses, and one Dallas County Quarter Horse have all tested positive for EIA.
The presumptive positive horse is a 7-year-old Quarter Horse mare currently housed at the Grass Pass Downs at the Josephine County Fairgrounds.
The EIA-positive Quarter Horse from Bexar County has been euthanized and the affected Maverick County Quarter Horse has been transferred to a quarantine facility.
Most EIA testing is done on a voluntary basis–owners aren’t necessarily required to test every horse at set intervals–making it very difficult to know the disease’s true prevalence, one researcher says.
Vaccines against WNV and EEE are highly effective in minimizing disease occurrence if given appropriately, Virginia’s state veterinarian said.
The horse from Strathcona County was euthanized shortly after a veterinarian collected samples for testing.
The affected horse was tested prior to being moved to a new premises, officials said. The animal is now quarantined.
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Equine infectious anemia can destroy horses’ red blood cells and cause weakness, anemia, and death.
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