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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.


November 09, 2016
Equine Herpes Viruses
Broward County, FL
Confirmed Case(s): No Quarantine
On November 8, one premises in Broward County was placed under quarantine after a horse displayed neurologic signs and was confirmed positive for EHV-1 wild type strain via PCR. Currently, no other horses at the premises have presented with clinical signs consistent with EHV-1. The index case died of natural causes late November 6 and started displaying neurologic signs the same day. All horses on the premises are required to have their temperatures taken twice daily with any temperatures above 101.5 reported to incident management and tested for EHV. Additional biosecurity measures are in place. The Florida Department of Agriculture and Consumer Services will continue to monitor the situation and provide updates as warranted. For additional information please click http://www.freshfromflorida.com/Divisions-Offices/Animal-Industry and look under announcements near the bottom center of the page.
November 09, 2016
Equine Herpes Viruses
Los Angeles County, CA
Confirmed Case(s): No Quarantine
At the Los Angeles Equestrian Center, a horse that had been placed in the quarantined isolation area of the facility on Nov. 3rd due to an elevated temperature and initially tested negative on both nasal swab and blood for EHV-1, has subsequently tested positive on both nasal swab and blood for non-neuropathic EHV-1. Since this horse was originally moved to isolation from a barn on the facility that had not previously been identified with a confirmed EHV-1 case, the horse population under quarantine at LAEC was expanded to a total of three barns under quarantine. All horses under quarantine are required to have their temperatures taken 2X/day and any elevated temperatures reported to incident management. In addition, all horses in these barns are under enhanced and strict biosecurity protocols. Since issuance of the quarantine on November 3, 2016 a total of six horses displaying neurologic signs have been confirmed positive for Equine Herpesvirus Myelencephalopathy. One of the six horses was euthanized on November 3rd due to the severity of clinical signs. All other confirmed positive horses remain in quarantined isolation and are stable and responding to treatment. Four of the six confirmed positive horses participated in a horseshow in Las Vegas, NV on October 24, -29, 2016. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show. CDFA has confirmed that the host facility has taken biosecurity measures of thorough cleaning and disinfection of the show facility. CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available.
November 08, 2016
West Nile Virus
Gibson, Dyer, and Chester Counties, TN
Confirmed Case(s): No Quarantine
The Tennessee Department of Agriculture has recently reported two new cases of WNV, one in Gibson County and one in Dyer County, and a case of EEE in Chester County. The vaccination status of the horses and the outcomes of the cases are unknown. For more information go to: http://www.tn.gov/agriculture/news/46602
November 08, 2016
Equine Herpes Viruses
Los Angeles County, CA
Confirmed case(s): Official Quarantine
At the Los Angeles Equestrian Center, a febrile horse displaying mild neurologic signs has been confirmed positive for the non-neuropathogenic strain of Equine Herpesvirus-1. Since issuance of the quarantine on November 3, 2016 a total of six horses displaying neurologic signs have been confirmed positive for Equine Herpesvirus Myelencephalopathy. One of the six horses was euthanized on November 3rd due to the severity of clinical signs. All other confirmed positive horses remain in isolation and under quarantine. All exposed horses remain under quarantine and temperatures are being taken twice daily. Four of the six confirmed positive horses participated in a horseshow in Las Vegas, NV on October 24, -29, 2016. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show. CDFA has confirmed that the host facility has taken biosecurity measures of thorough cleaning and disinfection of the show facility. CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available. For more information go to: https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html.
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): Official 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): Official 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.