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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 26, 2016 Eastern Equine Encephalitis Waupaca County, WI Confirmed Case(s): No Quarantine
The Wisconsin Department of Agriculture has confirmed an 10th case of equine EEE for 2016. The 8-year-old, unvaccinated, Standardbred mare from Waupaca County was ataxic before going down on 9/17. She was non-responsive with nystagmus and died that night
September 26, 2016 West Nile Virus Jefferson County, WI Confirmed Case(s): No Quarantine
The Wisconsin Department of Agriculture has reported a new case of WNV. The unvaccinated 5 year old Paint mare, located in Jefferson County, presented on September 10th with muscle fasciculations, rear weakness, and knuckling over of the left hind, and had a fever early on. The mare was sampled on September 15th, confirmed positive on September 23rd and is doing well at this time. This makes for 7 Equine WNV Cases in WI for 2016.
September 26, 2016 Eastern Equine Encephalitis Forest, Lincoln, Clark, Langlade Counties, WI Confirmed Case(s): No Quarantine
The Wisconsin Department of Agriculture has reported five new cases of EEE. All were confirmed late on September 23rd. Forest County: 8-yr.-old Saddlebred mare, unvaccinated; presented with fever, ataxia, blindness, unresponsive; euthanized September 14th. Lincoln County: 4-yr.-old Quarter Horse gelding, unvaccinated; presented September 14th with occasional paddling, seizures, cortical blindness, ataxia, bruxism, exaggerated eye responses; unresponsive, euthanized on September 15th. Lincoln County: 18-yr.-old Quarter Horse mare, no vaccination this year (unsure previous years); presented September 19th with ataxia, minimally responsive, bruxism, blindness; injuring itself; euthanized September 20th. Clark County: 8-yr.-old grade gelding, unvaccinated; presented down and unresponsive on September 20th; died despite treatment September 23rd. Langlade County: 12-yr.-old grade stallion, unvaccinated; presented September 13th recumbent, depressed, listless, coaxed to stand, but went back down; died September 14th. This makes a total of 10 Equine EEE Cases in Wisconsin for 2016.
September 23, 2016 West Nile Virus Hart County, KY Confirmed Case(s): No Quarantine
The Kentucky State Veterinarian’s Office has reported Kentucky’s 4th case of West Nile Virus located in Hart County. The unvaccinated 4 year old Standardbred mare presented with moderate rear limb ataxia, muscle fasciculation, lip paresis on September 15th. As of September 23rd the mare is reported as much improved with a prognosis of full recovery. Click the following link to view KY Dept. of Agriculture’s current summary (includes geographic reference map): http://www.kyagr.com/statevet/equine-infectious-diseases.html#west
September 23, 2016 West Nile Virus Shasta County, CA Confirmed Case(s): No Quarantine
On September 22, 2016, a 10 year old Quarter Horse gelding in Shasta County, California displaying neurologic signs was confirmed positive for West Nile Virus (WNV). The vaccination status of this horse is unknown. The gelding is recovering. For 2016, a total of nineteen (19) horses have been confirmed positive for WNV in California. Seven of the nineteen positive confirmed horses died or were euthanized. CDFA continually monitors and investigates equine neurologic cases for the presence of WNV in California. CDFA urges horse owners to consult their veterinarian concerning a WNV vaccination program to ensure maximum protection of their horses. For more information visit: https://www.cdfa.ca.gov/ahfss/animal_health/wnv_info.html
September 23, 2016 West Nile Virus Morrison County, MN Confirmed Case(s): No Quarantine
The Minnesota Veterinary Medical Association has reported the 16th case of WNV this year. The unvaccinated QH gelding, located in Morrison County, was first observed showing clinical signs on September 8th and is still alive though unable to stand without assistance.
September 22, 2016 West Nile Virus Bourbon County, KY Confirmed Case(s): No Quarantine
Results of diagnostic testing received from the University of Kentucky’s Veterinary Diagnostic Laboratory has today confirmed Kentucky’s 3rd equine West Nile case of the year. The unvaccinated 3 year old Standardbred mare presented with acute lethargy, general weakness and ataxia, mild muscle fasciculation in neck and chest area on September 18th and was hospitalized on September 20th. The horse continues to receive supportive care at the hospital today and is reported to be in a stable condition. For more information go to www.kyagr.com/statevet/equine-infectious-diseases.html#west
September 21, 2016 West Nile Virus Mineral County, WV Confirmed Case(s): No Quarantine
The West Virginia Department of Agriculture has reported a case of West Nile Virus confirmed on September 20th. The 6 year old QH mare located in Mineral County showed severe, acute neurologic symptoms but is still alive. Vaccination status is unknown.
September 21, 2016 Potomac Horse Fever Hampshire County, WV Confirmed Case(s): No Quarantine
The West Virginia Department of Agriculture confirmed a case of Potomac Horse Fever on September 20th in Hampshire County. The 6 year old QH gelding was febrile, lethargic, and passing loose stool. Vaccination status is unknown; the horse is alive.
September 21, 2016 West Nile Virus Cochise County, AZ Confirmed Case(s): No Quarantine
A horse in Cochise County has tested positive for West Nile Virus (WNV), marking the first detection of the disease in Arizona for the 2016 season. The affected horse is a 4-year old Quarter Horse gelding with no history of vaccination for WNV. The horse exhibited advancing medical signs and was euthanized.