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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
June 23, 2016 Equine Herpes Viruses Cooke County, TX Quarantine Ended
As of June 22, the premises quarantined for Equine Herpes Myeloencephalopathy (EHM) in Cooke County, Texas, has been released. There are no other reported EHM cases in Texas. The premises was released after more than 14 days of no new cases, and the previously positive horses now test negative for EHV-1.
June 19, 2016 Equine Herpes Viruses Ruidoso Downs racetrack, NM Ongoing Investigation
No new EHV-1 cases have been reported at Ruidoso Downs. A sample submitted yesterday was confirmed negative. The exposed barn where the first and only case was diagnosed remains under quarantine. There are no active cases at this time and the racetrack remains open. Trace backs are underway and states will be contacted individually regarding the movement of horses from Ruidoso Downs. From: New Mexico Livestock Board.
June 18, 2016 Equine Herpes Viruses Ruidoso Downs Racetrack, NM Confirmed case(s): Quarantine
New Mexico has a new confirmed EHM case at Ruidoso Downs. The horse became neurological yesterday and was euthanized and the barn where the horse was located is under quarantine for exposure. No other horses are showing any signs, but strict biosecurity is in force. Temperatures will be taken on all horses on the racetrack, but at this stage the racetrack will remain open and running. Movement of horses is being permitted on and off site. New Mexico Livestock Board.
June 17, 2016 Eastern Equine Encephalitis Horry County and Colleton County, SC Information Only
There were two new cases of EEE confirmed in SC the week of 6/10/16 bringing the total for 2016 to three total cases. Both new cases, like the initial 2016 case, were unvaccinated horses and were either euthanized or died prior to confirmation of EEE. There were no quarantines issued as these individual cases are closed.
June 17, 2016 Equine Influenza Jackson County, WV Information Only
The West Virginia Department of Agriculture reported one confirmed case of Equine Influenza in Jackson County on 6/15. Horse events in the county have been cancelled and The Department of Agriculture has suggested that horse owners in Jackson County avoid moving their horses for the time being. This is not considered to be an emergency situation; EIV is highly contagious but not fatal and will usually resolve in two to three weeks. For more information visit: http://www.agriculture.wv.gov/news/Pages/Department-of-Agriculture-Warns-Against-Moving-Horses-in-Jackson-County-Area.aspx
June 14, 2016 Equine Herpes Viruses Washington County, WI Quarantine Ended
On Monday, June 13, 2016, the quarantine was released on a West Bend stable that was under movement restrictions after a horse tested positive for the neurologic form of Equine Herpesvirus-1 (EHV-1) on May 12, 2016. Daily monitoring, strict isolation, and biosecurity measures taken by the stable owner and follow-up testing done by the stable’s veterinarian resulted in a rapid resolution of the outbreak and with no evidence of spread off the premises.
June 10, 2016 Equine Herpes Viruses Cooke County, TX Confirmed case(s): Quarantine
A partial quarantine release has been granted for the affected premise in Cooke County, TX. All infected horses (7) on the premises were removed to an isolation area after the diagnosis. Since isolating the EHV-1 positive horses, all horses on the facility have tested negative on nasal swabs 14 days after the affected horses were removed from the barn. Due to no additional horses showing any clinical signs or elevated temperatures, all barns on the facility have been released and cleared for breeding activities except for the barn housing the 7 infected horses. That barn will remain under quarantine until all horses are negative on nasal swabs. The horses are recovering and doing well at this time and we continue to encourage everyone in the equine community to practice sound biosecurity.
June 07, 2016 Eastern Equine Encephalitis Palm Beach County, FL Confirmed case(s): Quarantine
On June 6, a new EEE case was confirmed in Palm Beach County, Florida. The 14 month old, vaccinated Arabian had just moved within the county but had not been outside Palm Beach County since birth. Clinical signs began on May 31 and the horse was euthanized for humane reasons the same day. This is the first confirmed EEE case in Palm Beach County and the fourth confirmed case in Florida for 2016.
June 02, 2016 Equine Herpes Viruses Cooke County, TX Confirmed case(s): Quarantine
Since the two original confirmed EHM positive horses at a Cooke County, TX breeding facility on May 24-25, five additional horses have tested positive for EHM on whole blood PCR. Nasal swabs were also used and four horses tested negative and one tested positive. The newly confirmed horses were surrounding the original cases and isolated at the first sign of fever. None of the newly diagnosed horses have shown any neurological signs. The affected barn has a total of 40 horses and the farm is under quarantine and restricted from movement of animals and semen.
May 28, 2016 Equine Herpes Viruses Cooke County, TX Confirmed case(s): Quarantine
On May 24, 2016, late in the evening, a mare at a breeding farm in Cooke County, TX was reported to be infected with EHM on PCR from a blood sample. The horse began showing acute neuro signs when the test was performed. A quarantine was issued and no movement has taken place in or out of the barn. A second horse was tested positive on nasal swab on May 25 after showing slight neuro deficits. The affected horses have been isolated and strict biosecurity measures are in place. Temperatures are being monitored and no other fevers or clinical signs have been noted in the barn of 40 horses.