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Disease Outbreak 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.


Date Disease Location Status
September 12, 2017 West Nile Virus Beaver County, UT Confirmed Case(s): No Quarantine
Source: Utah Department of Agriculture and Food

On September 5th, the Utah Department of Agriculture and Food confirmed WNV in a 2-year-old Thoroughbred filly in Beaver County with an unknown vaccination history.  The filly presented with facial tremors and ataxia. She was treated and is improving.

September 11, 2017 Eastern Equine Encephalitis Trempealeau County, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection has reported confirmation of another case of Eastern Equine Encephalitis. The 14-year-old unvaccinated QH gelding from Trempealeau County was febrile, having difficulty standing, and eventually went down September 1.  He was euthanized.  This is Wisconsin’s 11th confirmed case of equine EEE in 2017.

September 11, 2017 West Nile Virus Utah County, UT Confirmed Case(s): No Quarantine
Source: Utah Department of Agriculture and Food

On September 8th, the Utah Department of Agriculture and Food confirmed WNV in a previously vaccinated 11-month-old filly in Utah County. The filly developed severe neurologic clinical signs and was euthanized. For more information go to http://ag.utah.gov/animal.html

September 09, 2017 West Nile Virus Metcalfe County, KY Confirmed Case(s): No Quarantine
Source: Kentucky Department of Agriculture

On 9/8/17 the Kentucky Department of Agriculture confirmed yesterday West Nile Virus in a 13-year old Tennessee Walking Horse gelding in Metcalfe County. On 9/2/17 the horse presented with a head tilt, loss of front limb proprioception and some ataxia. The horse was subsequently reported to be in stable condition with some improvement. There is no history of WNV vaccination.

September 09, 2017 West Nile Virus Spokane, Lincoln, Benton Counties, WA Confirmed Case(s): No Quarantine
Source: Washington State Department of Agriculture

Washington State Department of Agriculture has 7 confirmed cases of West Nile Virus starting from August 8 to August 30, 2017 including the following: a 10-year-old unvaccinated QH gelding from Spokane County----recovering; an 8-year-old unvaccinated QH mare from Spokane County---recovering; a 10-year-old unvaccinated QH gelding from Lincoln County---status unknown; a 26-year-old unvaccinated QH gelding from Spokane County---recovering; a 7-year-old unvaccinated Draft horse mare from Spokane County---euthanized; a 28-year-old recently vaccinated Arabian mare from Spokane County---recovering; and 4-year-old unvaccinated QHX gelding from Benton County---euthanized.

September 08, 2017 West Nile Virus Bruce County, ON Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture and Food

A 4-year old unvaccinated Quarter Horse mare from Bruce County, Ontario developed mild neurological signs due to West Nile Virus on August 27. Currently, the mare is receiving veterinary treatment. In 2017, the total number of confirmed WNV cases in Ontario is 7.

September 08, 2017 West Nile Virus Roscommon and Osceola Counties, MI Confirmed Case(s): No Quarantine
Source: Michigan Department of Agriculture and Rural Development

The Michigan Department of Agriculture and Rural Development has received confirmation of an unvaccinated, five-year-old, Tennessee Walker mare from Roscommon County testing positive for both West Nile Virus (WNV) and Eastern Equine Encephalitis (EEE) (dually infected) and an unvaccinated, 20-year-old grade mare from Osceola County testing positive for WNV.  This brings the total number of Michigan horses confirmed with WNV to 13 (two from Wexford and one each from the following counties: Clinton, Livingston, Jackson, Mecosta, Midland, Missaukee, Montcalm, Ottawa, Osceola, Roscommon, and St. Joseph) and the total number of horses reported as confirmed with EEE to two (one each from Osceola and one from Wexford).

September 08, 2017 West Nile Virus Box Elder and Duchesne Counties, UT Confirmed Case(s): No Quarantine
Source: Utah Department of Agriculture and Food

On September 5th, the Utah Department of Agriculture received confirmation of WNV in an unvaccinated 6-year-old Percheron mare located in Box Elder County. She has been treated and is improving, On September 7th, WNV was confirmed in a vaccinated 6-year-old Quarter Horse mare and an unvaccinated Thoroughbred stallion, located at separate premises in Duchesne County. Both have been treated and are improving. For more information go to: https://www.arcgis.com/home/webmap/viewer.html?webmap=05d1052335224f0da04ba5d7d2738666&extent=-119.4205,35.2414,-102.0951,42.8078

September 07, 2017 Eastern Equine Encephalitis Monroe County, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection has confirmed two new cases of Eastern Equine Encephalitis. Both horses, a 17-year-old Quarter Horse mare and a 2-year-old QH/Paint filly, were from Monroe County, were unvaccinated, and both were euthanized as a result. This brings the total to 10 EEE cases for 2017.

September 07, 2017 West Nile Virus Sauk, Dane, Oneida, Langlage, Outagamie, St. Croix, and Racine Counties, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection has reported confirmation of six additional cases of equine WNV on September 6th. A 9-year-old, unvaccinated Percheron gelding from Sauk County was euthanized. A 23-year-old, unvaccinated QH gelding from Dane County is recovering. A 9-year-old, unvaccinated QH mare from Oneida County is recovering. A 5-year-old pony mare of unknown vaccination status, from Langlade County is recovering. An undervaccinated, yearling Arabian gelding from Outagamie County was euthanized. An 8-year-old, unvaccinated Belgian mare from St. Croix County is recovering. Another case was confirmed on September 7th in Racine County. The 7-year-old Arabian mare is recovering. This brings the total to 13 confirmed WNV cases for 2017.