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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
August 12, 2016 Eastern Equine Encephalitis Darlington County, SC Confirmed Case(s): No Quarantine
The State Veterinarian’s office received laboratory confirmation of one new EEE case today. This case was an unvaccinated, 5 month old Paint from Darlington County, South Carolina. The colt did not survive. This is the first confirmed case in Florence County this year. The total number of confirmed cases in SC in 2016 is now 12.
August 12, 2016 Piroplasmosis Rutherford County, TN Ongoing Investigation
The state veterinarian’s office is investigating an outbreak of Equine Piroplasmosis (EP) in a group of racing Quarter Horses in Tennessee. Seventeen horses have tested positive; all are connected to the same location in Rutherford County. The investigation is ongoing. For more information go to:
August 11, 2016 Equine Infectious Anemia Cortland and Cayuga Counties, NY Quarantine Released
On 8/10/2016, the New York State Department of Agriculture and Markets, Division of Animal Industry completed a 5-month long investigation of Equine Infectious Anemia (EIA) in 11 horses in Cortland and Cayuga Counties. All exposed horses have tested negative and their respective farms have been released from quarantine. For more info go to:
August 05, 2016 Equine Influenza Yolo County, CA Confirmed case(s): Quarantine
Eight horses confirmed to have equine influenza are in quarantine at the veterinary teaching hospital at the University of California at Davis in Yolo County. Clinical signs include fever, coughing and nasal discharge. The origin of the first case is under investigation. For more information go to:
August 05, 2016 West Nile Virus Burleigh County, ND Confirmed Case(s): No Quarantine
A case of WNV was confirmed in a mule in Burleigh County. The unvaccinated mule was euthanized due to neurologic clinical signs.
August 05, 2016 Eastern Equine Encephalitis Hopewell, VA Confirmed Case(s): No Quarantine
The Virginia Department of Agriculture and Consumer Services (VDACS) today announced the fourth case of Eastern Equine Encephalitis (EEE) in a Virginia horse this year. The horse, a six-year-old Tennessee Walking Horse mare, was from Hopewell. The horse had not been vaccinated since 2014 and was euthanized because of the severity of her symptoms. Go to:
August 05, 2016 West Nile Virus Croix County, WI Confirmed Case(s): No Quarantine
A 4-year-old Quarter Horse gelding was diagnosed with West Nile Virus in St. Croix County, Wisconsin, this week. At onset of clinical signs the horse showed signs of paresis, but was able to rise with assistance and stand for short periods of time. Samples taken on July 27th confirmed the diagnosis today. The horse died earlier this week.
August 05, 2016 West Nile Virus Weld County, CO Confirmed Case(s): No Quarantine
A 6 yr old Friesian mare in Weld County, Colorado has been diagnosed with West Nile Virus (WNV). This is the first confirmed case of WNV in Colorado in a horse in 2016. This index case was diagnosed by Colorado State University Veterinary Diagnostic Laboratory in Fort Collins. The mare, which was imported from Mexico 30 days prior, appears to be recovering from front limb paralysis weakness.
August 05, 2016 West Nile Virus Cayuga County, NY Confirmed Case(s): No Quarantine
An unvaccinated, 8yr old stallion was diagnosed with WNV earlier this week. Owner first noticed symptoms on 7/25/2016. Horse exhibited the following: holding head in a fixed low position, blind, febrile and ataxia. Horse went down despite veterinary treatment. Horse was euthanized on 7/27/2016. EEE and Rabies tests were negative.
August 04, 2016 West Nile Virus Mille Lacs, MN Confirmed Case(s): No Quarantine
The Minnesota Board of Animal Health has confirmed its second case of WNV. The draft cross stallion, located in Mille Lacs county, is showing neurologic signs but is still alive. The horse’s vaccination status is unknown.