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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
January 12, 2018 Equine Herpes Viruses Bethany, CT Quarantine Released
Source: Attending Veterinarian

The quarantine established for an outbreak of of Equine Herpesvirus Myeloencephalopathy (EHM) in Bethany Connecticut on 12/5/2017 has been released.

January 12, 2018 Equine Herpes Viruses Belmont Park, NY Confirmed case(s): Quarantine
Source: New York State Department of Agriculture and Markets

The New York State Department of Agriculture and Markets has confirmed a case of EHV-1 at Belmont Park. A 3-year old male was sent to the Cornell Ruffian Equine Hospital after developing clinical signs including fever and mild respiratory signs. The horse has not shown any neurologic signs and is currently at the Ruffian Center for monitoring. Barn 44 at Belmont Park, where the horse was originally house prior to being transported, has been placed under a precautionary quarantine. For more information go to https://aaep.org/sites/default/files/Documents/DiseaseFactsheetEHV.pdf 

January 11, 2018 Equine Influenza Cochise County, AZ Confirmed case(s): Quarantine
Source: Attending veterinarian

Laboratory results have confirmed equine influenza in a group of approximately 50 horses in Cochise County, Arizona.  Fever, Malaise, inappetence and nasal discharged were first observed on 1/1/2018. Affected barns have been asked to establish a quarantine. The vaccination status of the horses is unknown. 

January 11, 2018 Equine Herpes Viruses King County, WA Outbreak Update
Source: Washington State Department of Agriculture

At this time the EHV-1 neurotropic strain disease outbreak has been confined to Goldcreek Equestrian Center in Woodinville, Washington which remains under Quarantine. Seven horses displaying neurological symptoms were euthanized, but no horses have been euthanized since December 23rd 2017. Efforts have focused on the importance of equine biosecurity, early detection, early isolation of infected horses and early quarantine to prevent disease spread through the movement of horses, vehicles and people.

January 03, 2018 Strangles Los Angeles County, CA Confirmed case(s): Quarantine
Source: Attending Veterinarian

A quarantine for Strangles has been established at a facility in Los Angeles County. Last week two febrile horses were tested for Streptococcus equi. One horse tested positive and one negative on nasal swab PCR. Based on the results, a quarantine has been established at the facility by Los Angeles County and the horses that tested positive are isolated from the general population.

January 02, 2018 Strangles Palm Beach County, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On January 2nd, 2018, one premise in Palm Beach County, Florida was placed under quarantine for clinical signs and positive PCR and culture confirmation of Strangles. The index case became clinical on December 26th. The clinical horse was obtained from a feedlot in Louisiana approximately 5 weeks ago and then underwent a 1 week quarantine in South Carolina immediately before arriving in Florida. This is the 6thStrangles quarantine in Palm Beach County and the 42nd in the state of Florida for 2017.

December 27, 2017 Strangles Marion County, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On December 22nd  2017, the Florida Department of Agriculture and Consumer Services confirmed Strangles in a horse in Marion County. The premises was placed under quarantine.  The index case had clinical signs on December 17, 2017 and was confirmed positive by culture. All other horses (6) on the premise are free of clinical signs at this time. This is the 10th case of Strangles reported in Marion County and the 41st for the state of Florida in 2017.

December 26, 2017 Equine Herpes Viruses King County, WA Outbreak Update
Source: Washington State Department of Agriculture

On December 15, 2017 the Washington State Department of Agriculture EHV 1 a 13-year old Halflinger gelding at one facility in King County, WA.  37 of 60 horses have now been tested with 16 horses confirmed positive for the Equine Herpes 1 neurotropic strain.  Seven horses have been euthanized due to Equine Herpesvirus Myeloencepalopathy( EHM). Clinical signs of the EHM horses included 102-105 fevers, hind limb ataxia, no tail tone and dribbling urine. Treatment of horses include supportive care and anti-viral therapy.  The attending veterinarian is making morning and evening rounds at the barn and evaluating fevers and clinical signs.  The horse facility is still under quarantine and strict equine biosecurity in place.  At this time no other horse facilities are reporting new cases in the state of Washington. 

December 26, 2017 Equine Herpes Viruses Butler County, PA Quarantine Released
Source: Pennsylvania Department of Agriculture

On Tuesday December 26, 2017 the quarantine put in place in Butler County, Pennsylvania, which arose from an initial EHV-1 quarantine on November 15, 2017, has been revoked by the Pennsylvania Department of Agriculture. This was the index premises, a small dressage barn.  One other closely related private barn was also under quarantine, but that quarantine was released on December 6, 2017.  No additional cases beyond the index case, which has recovered, were identified during this quarantine.

December 21, 2017 Equine Infectious Anemia Newell County, AB Confirmed case(s): Quarantine
Source: Canadian Food Inspection Agency

On December 13, 2017 a positive Equine Infectious Anemia (EIA) result was confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for a horse on a premises in Newell County, Alberta. The animal had been sampled by an accredited veterinarian to comply with U.S. export conditions; no clinical signs of disease were noted at the time of sampling. A CFIA investigation is underway and as per program policy, a quarantine has been placed on the infected animal and its on-premises contacts. The quarantine will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of positive cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current program policy.