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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 27, 2016 West Nile Virus Barren and Hardin Counties, KY Confirmed Case(s): No Quarantine
One August 26, 2016 two cases of West Nile Virus were confirmed by the Kentucky State Veterinarian’s office. One is a 5-year-old racking horse mare fin Barren County and the second a 11-year-old Quarter Horse mare in Hardin County. Initial onset for both horses was August 22, 2016. There is no history of WNV vaccination for either horse. Both horses are alive and improving.
August 24, 2016 West Nile Virus Uintah County, UT Confirmed Case(s): No Quarantine
The second confirmed case of equine West Nile Virus has been reported to the Utah State Veterinarian's office. The animal, also located in Uintah County but unrelated to the first case, was a yearling, unvaccinated, Quarter Horse. The horse died during the veterinarian's farm call with clinical signs and Utah Department of Agriculture and Food had the horse tested for confirmation of the disease. For more information go to http://ag.utah.gov
August 24, 2016 Piroplasmosis Bedford and Rutherford Counties, TN Ongoing Investigation
Nineteen racing Quarter horses have tested positive for EP in Middle Tennessee. All are connected to two locations in Rutherford County and Bedford County. The investigation is ongoing. - See more at: http://www.tn.gov/agriculture/news/44758#sthash.SwQBNWfs.dpuf
August 24, 2016 West Nile Virus Uintah County, UT Confirmed Case(s): No Quarantine
The first confirmed case of equine West Nile Virus in Utah has been reported to the State Veterinarian's office. The animal, located in Uintah County, was a four-year old, unvaccinated, Quarter Horse gelding. The horse was humanely euthanized because of present clinical signs and for the welfare of the animal. No quarantine.
August 23, 2016 Eastern Equine Encephalitis Orange County, TX Confirmed Case(s): No Quarantine
The Texas Veterinary and Medical Diagnostics Laboratory has reported a confirmed case of Eastern Equine Encephalitis in Orange County, Texas. The vaccination history and outcome of the case is unknown. For more information go to https://tvmdl.tamu.edu/2016/08/15/additional-equine-west-nile-virus-positives-2016-confirmed-first-eastern-equine-encephalitis-confirmed/.
August 23, 2016 West Nile Virus Limestone, Erath, Denton, Austin, Montgomery, Lamar, Polk, McLennan, Wood counties, TX Confirmed Case(s): No Quarantine
The Texas Veterinary and Medical Diagnostics Laboratory has reported confirmed cases of West Nile Virus in horses in 9 counties so far in 2016. The counties with positive cases are Limestone County, Erath County, Denton County, Austin County, Montgomery County, Lamar County, Polk County, McLennan County, and Wood County. The vaccination history and outcomes for these cases are unknown. For more information go to https://tvmdl.tamu.edu/2016/08/15/additional-equine-west-nile-virus-positives-2016-confirmed-first-eastern-equine-encephalitis-confirmed/.
August 22, 2016 West Nile Virus Clark County, WI Confirmed Case(s): No Quarantine
The second case of West Nile Virus (WNV) was confirmed in a 4-year-old mixed breed (Standardbred/Belgian) unvaccinated gelding from Clark County, Wisconsin in 2016.  The horse showed acute neurologic symptoms (ataxia, recumbency) on August 10, 2016. Blood taken for testing on August 11th was positive for WNV on August 19, 2016.  Despite symptomatic treatment, the horse died on August 17, 2016.  Go to: https://datcp.wi.gov/Pages/Homepage.aspx
August 19, 2016 West Nile Virus Fresno, Calaveras, Riverside, Sacramento, San Diego, San Joaquin, Sutter and Ventura Counties, CA Confirmed Case(s): No Quarantine
A total of eight (8) horses have been confirmed positive for WNV in California in 2016. The positive horses are located in the following counties; Fresno, Calaveras, Riverside, Sacramento, San Diego, San Joaquin, Sutter and Ventura counties. All horses were not current on their WNV vaccinations. Two of the eight positive confirmed horses were euthanized. CDFA continually monitors and investigates equine neurologic cases for the presence of WNV in California. For more information go to: https://www.cdfa.ca.gov/ahfss/animal_health/WNV_Info.html
August 19, 2016 Equine Herpes Viruses Newport, WA Confirmed case(s): Quarantine
The Washington State University College of Veterinary Medicine has confirmed a single horse with a neurologic form of Equine Herpes Virus (EHV-1) has been in isolation since it arrived yesterday at the Veterinary Teaching Hospital in Pullman Washington. The 18-year-old Quarter Horse mare from Newport, Washington has been competing in rodeo events until it developed symptoms. The mare will be euthanized today. The Veterinary Teaching Hospital remains open to receive cases. For more information go to https://news.wsu.edu/2016/08/19/wsu-veterinarians-confirm-equine-herpes-case/
August 19, 2016 West Nile Virus Todd, Polk, Renville, Winona and Chicago Counties, MN Confirmed Case(s): No Quarantine
The Minnesota of Animal Health has reported 5 additional cases of WNV bringing the total to 7 cases for 2016. An unvaccinated 6 year old Standardbred gelding was euthanized in Todd County on 7/30/16 and confirmed positive for WNV on 8/9/16. A 4 year old unvaccinated draft mare was confirmed positive on 8/12/16 in Polk County; she is unccordinated but able to stand and walk. An 8 year old unvaccinated Quarter horse gelding was euthanized in Renville County on 8/10/16 and confirmed positive on 8/12/16. An unvaccinated Morgan mare in Winona County was confirmed positive on 8/16/16; she is currently receiving supportive care and is slowly improving. An unvaccinated 8 year old Appaloosa gelding in Chisago County was confirmed positive on 8/18/16; he is having difficulty standing on his own. For more information go to https://www.bah.state.mn.us/horses/#equine-encephalitis-virus-and-west-nile-virus