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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.


September 07, 2016
West Nile Virus
Goodhue County, MN
Confirmed Case(s): No Quarantine
The Minnesota Board of Veterinary Medicine has reported a 14th confirmed case of West Nile Virus for 2016. The 3 year old Shire filly, located in Goodhue County, began showing clinical signs on 8/30/16. The week before clinical signs were seen the filly was a the Iowa State Fair. The filly was unvaccinated and is currently recovering. For more information go to https://www.bah.state.mn.us/horses/
September 06, 2016
West Nile Virus
Clark County, WI
Confirmed Case(s): No Quarantine
The Wisconsin Department of Agriculture has reported its 5th case of West Nile Virus for 2016 in Clark county. The unvaccinated 16-month old Belgian colt started showing neurologic signs on 8/29. The horse received treatment and is now able to stand and eat on it own, though it remains ataxic.
September 03, 2016
Equine Infectious Anemia
McCurtain County, OK
Confirmed Case(s): No Quarantine
The Oklahoma Department of Agriculture (ODAFF) has confirmed a second EIA positive horse for 2016. The 13-year old QH gelding located in McCurtain County was euthanized.  Past EIA test history for this horse is unknown. ODAFF recommends regular EIA testing for all horses, including those that do not leave the property, at least every 3 years. Go To: http://www.oda.state.ok.us
September 02, 2016
West Nile Virus
Clark and Rusk counties, WI
Confirmed Case(s): No Quarantine
West Nile virus was confirmed in two horses. One was an unvaccinated, 15-month-old Belgian gelding from Clark County. The gelding started showing symptoms (mild stumbling) on 8/29.  The second was an unvaccinated, 12-year-old Quarter Horse gelding from Rusk County that had trouble getting up and was ataxic on 8/22.  Both horses are improving.
September 02, 2016
Piroplasmosis
Wyoming, United States
Confirmed case(s): Official Quarantine
On August 25, a Wyoming origin race horse tested positive in California for Equine Piroplasmosis. Subsequent testing of other horses in Wyoming that were associated with the positive animal identified 13 additional infected horses involved that belong to one owner in Wyoming as well as another horse belonging to one owner from Utah. These animals are currently under quarantine at the owner's property. Following consultation with the USDA APHIS Equine Epidemiologist, Wyoming Livestock Board (WLSB) veterinarians may allow permitted movement of test negative animals to other Wyoming race tracks this racing season. Wyoming Pari-Mutuel Commission has issued an order, which will go into effect on September 8, requiring all horses that enter a sanctioned race track in Wyoming to have a negative Theileria equi cELISA test within 12 months prior to the event. Go To: https://wlsb.state.wy.us/editable-page/home/downloadFile?filename=2016-09-02_Equine-Piroplasmosis-Case_Press-ReleaseA.pdf
September 02, 2016
West Nile Virus
Becker County, MN
Confirmed Case(s): No Quarantine
The Minnesota Board of Veterinary Medicine has reported a new case if WNV in Becker County. The unvaccinated 8 year old Paint mare, which began showing clinical signs on 8/30, is currently able to stand and eat on its own
September 01, 2016
Equine Herpes Viruses
Newport , WA
Outbreak Update
As of today the Washington Department of Agriculture states that there is no official quarantine in place after the EHV-1 case was reported on 8/19 and the affected horse was euthanized. The premises where the affected horse was located is maintaining a self-imposed quarantine. Currently the WA Department of Agriculture is not recommending the cancellation of local events or limiting travel.
September 01, 2016
Equine Infectious Anemia
Atoka County, OK
Confirmed Case(s): No Quarantine
The Oklahoma Department of Agriculture has confirmed the first EIA positive horse for 2016 in Oklahoma. The 14 year old QH mare was located in Atoka County.
August 31, 2016
West Nile Virus
Fremont County, WY
Confirmed Case(s): No Quarantine
A new case of WNV has been reported in Fremont County, Wyoming. The affected horse was not vaccinated for WNV, and was displaying neurological signs. The horse is recovering.
August 31, 2016
Eastern Equine Encephalitis
Forest and Vilas Counties, WI
Confirmed Case(s): No Quarantine
Two horses in Wisconsin have been confirmed with Eastern Equine Encephalitis (EEE). One was an unvaccinated 2-month old Quarter horse filly in Forest County that developed acute illness including a fever and neurologic signs. The filly was humanely euthanized. The second was a 4-year-old Welsh Pony mare from Vilas County with an uncertain vaccination history. The mare became acutely febrile developed neurologic symptoms and was humanely euthanized after becoming recumbent.