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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 16, 2016
West Nile Virus
Clark County, WI
Confirmed Case(s): No Quarantine
An unvaccinated Belgian filly in Clark County, Wisconsin was confirmed as the 6th West Nile Virus case in 2016. The filly had trouble standing on Sept 10th and was tested and treated on that day. At last report the filly was recovering. Four to the six confirmed WNV cases have been in Clark County.
September 15, 2016
West Nile Virus
Toronto, ON
Confirmed Case(s): No Quarantine
On September 12, the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) was notified of a positive test result for West Nile Virus (WNV) in a horse from the Toronto area. The horse displayed signs of fever, muscle tremors, gait abnormalities (ataxia) and weakness. The horse’s vaccination history is unknown; the horse is recovering under veterinary medical supervision.
September 13, 2016
West Nile Virus
Marshall County, MN
Confirmed Case(s): No Quarantine
The Minnesota Board of Animal Health has confirmed West Nile Virus infection in a 2-year old Quarter Horse gelding in Newfolden (Marshall County). The horse which had neurologic symptoms was not vaccinated but is recovering.
September 13, 2016
Eastern Equine Encephalitis
Waupaca County, WI
Confirmed Case(s): No Quarantine
Wisconsin has confirmed another positive equine case of EEE. The middle-aged unvaccinated Haflinger gelding from Waupaca County was found down with neurologic signs on September 6th and tested. He did not respond to treatment and was euthanized on September 7th. That is the third confirmed equine case in WI this year.
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.