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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.


June 30, 2016
Eastern Equine Encephalitis
Suffolk, VA
Information Only
The Virginia Department of Agriculture and Consumer Services (VDACS) has confirmed the first case of Eastern Equine Encephalitis (EEE) in a Virginia horse this year. The horse, from Suffolk, was a Saddlebred mare. She exhibited symptoms on June 22 and was euthanized June 23. Her vaccination record is unknown. For more information go to http://www.vdacs.virginia.gov/press-releases-160630-eee.shtml
June 30, 2016
Eastern Equine Encephalitis
Osceola County, FL
Information Only
One EEE-confirmed positive horse with illness onset 6/22/2016 in Osceola County, was reported from the Florida Department of Agriculture & Consumer Services (FDACS) for Osceola County. This is the same horse reported earlier this week with WNV infection and it would appear that the horse had a co-infection with both viruses. This is the 8th equine to be reported with EEE infection with onset during 2016 statewide and the second for Osceola County.
June 29, 2016
Equine Infectious Anemia
Arapahoe Park, CO
Quarantine(ended)
On June 28, 2016, the Colorado Department of Agriculture, State Veterinarian’s Office, released the hold order on the Arapahoe Park race track in Aurora, CO. The office was informed that the Equine-Infectious-Anemia-(EIA)-positive mare which prompted the hold order was euthanized Monday morning. A second exposed animal, a pony owned by the same person, was removed from the track to a newly quarantined premises.
June 28, 2016
Eastern Equine Encephalitis
Polk County, FL
Information Only
On June 28, a new EEE case was confirmed in Polk County, Florida. The 6 year old Arabian had no vaccine history for EEE and no recent travel history. Clinical signs began on June 19 and the horse was euthanized for humane reasons the same day. This is the third confirmed EEE case in Polk County and the seventh confirmed case in Florida for 2016.
June 27, 2016
West Nile Virus
Osceola County, FL
Information Only
On June 27, a new WNV case was confirmed in Osceola County, Florida. The horse had no vaccine history and had not been out of the county in the past month. Clinical signs began on June 22 and the horse was euthanized for humane reasons the same day. This is the first confirmed WNV case in Osceola County and the first confirmed case in Florida for 2016.
June 27, 2016
Eastern Equine Encephalitis
Jefferson and Walton Counties, FL
Information Only
On June 24, two new EEE case were confirmed, one each in Jefferson and Walton County, Florida. The Jefferson County case, an 8 year old Draft horse, became clinical on June 16 and had previous vaccination history in September 2015. The gelding was euthanized for humane reasons. The Walton County case had no vaccination history and no reported travel history with in the past month. Clinical signs began on June 17 and the horse died of natural causes on June 19. This is the first confirmed EEE case in Jefferson and Walton County and the fifth and sixth confirmed cases in Florida for 2016.
June 24, 2016
Eastern Equine Encephalitis
Marion County, SC
Information Only
The State Veterinarian’s office received laboratory confirmation of one new case of EEE during the week of 6/24/16. The horse, located in Marion County, was euthanized. The total number of confirmed cases in SC in 2016 is now 4.
June 24, 2016
Equine Infectious Anemia
Arapahoe Park, CO
Investigation Initiated
On June 23, 2016, the Colorado Department of Agriculture, State Veterinarian’s Office, was notified by the USDA National Veterinary Services Laboratory (NVSL) that a non-racing horse presently located at Arapahoe Park in Aurora, CO tested positive for Equine Infectious Anemia (EIA). Confirmatory tests are currently being run. Arapahoe Park is currently under a hold order that restricts movement of horses until an initial investigation is completed by the Colorado Department of Agriculture (CDA). The affected horse has been in Colorado less than 60 days and came from an out-of-state track. It appears that the horse was infected prior to coming to Colorado and previously tested negative for the disease in May of 2015. Because the disease is most commonly spread by biting flies and it is very early in Colorado’s fly season, the risk of disease transmission to other horses at the track appears to be relatively low.
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.