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.
Two horses in Maricopa County are recovering after testing positive for West Nile virus (WNV).
The American Quarter Horse from Chesapeake, with an incomplete vaccination history, was euthanized due to disease severity.
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.
A horse from Hampshire County was euthanized last week after contracting West Nile virus.
A 5-year-old mare from Monmouth County was vaccinated against EEE in 2017, but not in 2018. She was euthanized Aug. 18.
Animal health officials have confirmed WNV in Montana horses in Blaine, Cascade, Lewis and Clark, Powder River, Wheatland, and Yellowstone counties.
Two unvaccinated horses in Northeast Ohio have tested positive for West Nile virus (WNV). These are the first cases of WNV in Ohio horses identified this year.
These bring the total number of confirmed equine WNV cases in California to five so far this year.
A Larimer County horse has been diagnosed with West Nile virus; this is the first case of WNV in Colorado horses confirmed in 2018.
Routine horse vaccinations are one of the easiest and most efficient ways to protect equids’ health against potentially fatal infectious diseases.
The unvaccinated 9-year-old pony mare from Fauquier County has recovered.
The 5-year-old Quarter Horse from Grant County has a favorable prognosis at this time and is receiving supportive care.
Officials are urging caution after a Quarter Horse mare from Suffolk, who was incompletely vaccinated—she received the initial vaccination against EEE, but not a follow-up booster—died late last month.
The unvaccinated 15-year-old gelding, from Addison, in Steuben County, began showing clinical signs on Aug. 4, was hospitalized Aug. 5, and is reportedly recovering from infection.
The 5-year-old mare from Chesterfield County had no vaccination history and died.
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