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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, 2016 West Nile Virus Jackson County, OK Confirmed Case(s): No Quarantine
The third reported WNV positive horse has been confirmed for 2016 in Oklahoma. The 16 year old QH gelding located in Jackson County was showing severe neurologic signs including hind limb ataxia. Vaccination history is unknown.
September 08, 2016 West Nile Virus St. Lawrence and Suffolk Counties, NY Confirmed Case(s): No Quarantine
Two cases of West Nile Virus have been confirmed in New York State. The first an 18 year old mare from Lisbon, NY, had depression, blindness, difficulty eating, and ataxia. The mare eventually went down and was euthanized on 8/24/2016. The second an unvaccinated, 23 yr old gelding from Manorville, NY, had front leg weakness which progressed to both front legs. The gelding went down and exhibited whole body tremors. Horse was euthanized on 9/2/2016. WNV was confirmed in both cases through serology at Cornell University.
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): 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.