New cases in Boyle, Harrison, Jackson, and Mercer counties were reported Sept. 20. One affected horse was alive at last update and three had been euthanized. None had been vaccinated against WNV.
Unvaccinated horses and those with unknown vaccination histories from Lyon, Marion, Neosho, Seward, and Wichita counties have tested positive for WNV.
Since June, three Dallas County horses have tested positive for EIA.
The unvaccinated horse from York County is currently receiving supportive veterinary care.
No horses in Wyoming have tested positive for EIA at this time. However, there are now 58 horses quarantined at 12 facilities in Albany, Fremont, Laramie, Lincoln, Natrona, Park, Sweetwater, and Teton counties.
Officials reported seven cases of WNV in Wyoming horses residing in Campbell, Fremont, Goshen, Park, and Sheridan counties.
The affected horse developed acute and severe neurologic signs of disease and was euthanized.
Animal health officials confirmed the first WNV case and fourth EEE case in New Jersey horses in 2018.
The 7-year-old horse from Monmouth County had not been vaccinated against EEE in 2018 and was euthanized on Sept. 4.
Officials have confirmed six EEE cases and one WNV case in Ontario horses during late August and early September.
So far this year positive WNV cases have been identified in Kern, Merced, Placer, Sacramento (two cases), Shasta, and Stanislaus counties, California animal health officials said.
More than 100 of those horses were sent to 20 other states across the country. The Colorado Department of Agriculture is working to locate, quarantine, and retest those horses.
The Maryland Department of Agriculture’s Animal Health program is reminding horse owners to keep vaccinations up-to-date current after three unvaccinated horses tested positive for WNV in August.
Both horses–one from Cattaraugus County and one from Genesee County–were euthanized.
Animal health officials have confirmed cases in Ashtabula, Champaign, and Geauga counties. Two horses are recovering and one was euthanized.
Officials confirmed three cases in Park County and one in Sheridan County.
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