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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
November 08, 2016 West Nile Virus Atoka and Sequoyah Counties, OK Confirmed Case(s): No Quarantine
The Oklahoma Department of Agriculture has confirmed three more WNV positive horses bringing the total up to 12 for 2016. A 6yr QH gelding located in Atoka County. The horse was vaccinated a couple weeks prior to showing clinical signs. A 7yr pony mare located in Atoka County. The pony was vaccinated a couple weeks prior to showing clinical signs. A 8yr QH gelding located in Sequoyah County. Vaccination history is unknown. For more information visit: http://www.ag.ok.gov
November 04, 2016 Equine Herpes Viruses Los Angeles County, CA Confirmed case(s): Quarantine
On November 4, 2016, three additional horses were confirmed positive for the non-neuropathogenic strain of Equine Herpesvirus-1 on the Los Angeles County index premises. Two of the three affected horses display neurologic signs and the third horse is febrile and all three are in isolation. Two of these newly confirmed equine cases attended the Las Vegas horse show last week. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show on October 27 - 29, 2016. Exposed horses on the Los Angeles index premises continue to have their temperatures monitored twice daily and enhanced biosecurity measures remain in place. CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available.
November 04, 2016 West Nile Virus Logan and Union Counties, KY Confirmed Case(s): No Quarantine
Two additional cases of WNV in Kentucky were confirmed at Murray State University’s Breathitt Veterinary Center.  A 10-year old Belgian mare in Logan County began showing clinical signs on October 31st. This horse presented with lethargy, mild ataxia predominantly in rear limbs, inappetence. The attending veterinarian reported horse was showing some improvement on November 3rd. This horse has no WNV vaccination history.  The second horse, a 2-year old American Saddlebred colt in Union County with no WNV vaccination history, began showing clinical signs on October 31st. The colt presented with muscle fasciculation and mild ataxia. The attending veterinarian reported that colt was in stable condition, not worsening on November 3rd. These two cases are the 5th and 6th equine cases reported year-to-date in Kentucky, none of which are reported or thought to have been vaccinated.
November 03, 2016 Equine Herpes Viruses Los Angeles County, CA Confirmed case(s): Quarantine
On November 3, 2016, a 5 year-old Saddlebred displaying severe neurologic signs and a 10 year-old Saddlebred in Los Angeles County displaying moderate neurologic signs were confirmed positive for the non-neuropathogenic strain Equine Herpesvirus-1 at the California Animal Health and Food Safety Laboratory. Due to severity of clinical signs, the 5 year-old horse was euthanized on November 3, 2016. The Department has issued a quarantine for exposed horses at the facility and has implemented enhanced biosecurity measures. All exposed horses will have temperatures taken twice daily and be observed for clinical signs compatible with EHV. The two confirmed positive horses, along with four other horses, recently returned from a horse show in Las Vegas, NV from Oct. 27-29, 2016. These horses returned to the California home premises on October 30. Out of an abundance of caution, show management has notified trainers/owners participating in the event to recommend twice daily temperature monitoring and observation of compatible clinical signs. CDFA Animal Health Branch veterinarians are onsite monitoring the situation and will provide additional updates as they become available.
November 02, 2016 Eastern Equine Encephalitis Highlands County, FL Confirmed Case(s): No Quarantine
On November 2, a new EEE case was confirmed in Highlands County, Florida. The 2 year old grade gelding had never received any type of vaccination and had no recent travel history. Clinical signs began on October 25 and the horse was euthanized for humane reasons the following day. This is the second confirmed EEE case in Highlands County and case 22 in Florida for 2016.
October 28, 2016 Eastern Equine Encephalitis Wood County, WI Confirmed Case(s): No Quarantine
Wisconsin confirmed equine EEE case on October 28, 2016. The horse was an unvaccinated 12-year-old Quarter Horse gelding from Wood County. The horse showed signs of circling and ataxia on 10/25/16 and was down, became unresponsive in approximately 8 hours and subsequently died. This is the 19th confirmed case of EEE in Wisconsin in 2016.
October 25, 2016 West Nile Virus Choctaw, Payne, Beckham, and Atoka Counties, OK Confirmed Case(s): No Quarantine
The Oklahoma Department of Agriculture has confirmed four more WNV positive horses this week bringing the total up to 9 for 2016. A 8yr pony gelding located in Choctaw County was showing severe neurologic signs, including leg paralysis, and was euthanized. The pony was not vaccinated for WNV. A yearling QH filly located in Payne County was showing moderate neurologic signs, including hind limb ataxia. The horse was not vaccinated for WNV. A 16yr QH gelding located in Beckham County was showing mild neurologic signs and is recovering. The horse was not vaccinated for WNV. A 7yr QH gelding located in Atoka County was showing severe neurologic signs, including hind limb paralysis and was euthanized. Vaccination history is unknown. For more information visit: http://www.ag.ok.gov
October 25, 2016 Strangles Miami-Dade County, FL Confirmed case(s): Quarantine
On October 25, one premise in Miami-Dade County, Florida was placed under quarantine for strangles. Clinical signs began Oct 18. No animals have left the facility since clinical signs began. This is the fourth case in Miami-Dade County and the 21st case for Florida in 2016.
October 25, 2016 West Nile Virus Palm Beach County, FL Confirmed Case(s): No Quarantine
On October 24, a new WNV case was confirmed in Palm Beach County, Florida. The donkey had no vaccine history and was imported from a Louisiana auction into Florida on October 16 with no clinical signs. Clinical signs began on October 18 and currently the donkey is recovering. This is the first confirmed WNV case in Palm Beach County and the second confirmed case in Florida for 2016. Given the travel history and incubation period for WNV, the donkey most likely did not acquire WNV in Palm Beach County.
October 18, 2016 Eastern Equine Encephalitis Osceola County, FL Confirmed Case(s): No Quarantine
On October 18, a new EEE case was confirmed in Osceola County, Florida. The 4 year old grade male’s vaccination history is unknown and he had no recent travel history. Clinical signs began on October 9 and the horse was euthanized for humane reasons one day later. This is the fifth confirmed EEE case in Osceola County and case 21 in Florida for 2016.