Disease 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.



Equine Herpesvirus- Neurologic
Kentucky, United States
Outbreak Identifier: 5485
Alert ID: 2880
January 26, 2023
Information Only

Kentucky Department of Agriculture

Facility Type: Racetrack; 
Comments: Movement of horses from Gulfstream to Kentucky Tracks: Horses moving from Gulfstream racetrack (or having recently been on the grounds) can be allowed entry if the horse meets the published requirements for entry in addition to the modifications listed below: Prior to a horse destined to a Kentucky track/training facility departing, the horse’s trainer or veterinarian is to contact the equine medical director, or his designated person, and provide required information on each horse that is seeking approval to move to the track. Approval of a designated horse to enter the Kentucky destination track by that track’s equine medical director is based on the condition that the horse is to be temperature monitored and recorded twice daily for seven (7) days post arrival with the temperature logs posted on the stall. Any elevated fever or other sign or suspicion of illness shall immediately be reported to the equine medical director. The horse is to travel on a Health Certificate showing examination and issuance of the certificate performed the day of departure or during the 12hours immediately preceding the departure. The certificate shall have the EHV vaccination recorded on it as well as the date the equine medical director approved the move and the estimated time of departure and KY arrival. These requirements are being adjusted in consultation with the track’s equine medical directors and are subject to change without any advanced notice being provided should the disease event at Gulfstream Park change.;

Equine Herpesvirus- Neurologic
Broward County, FL
Outbreak Identifier: 5483
Alert ID: 2878
January 25, 2023
Outbreak Update

Florida Department Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: 188;

Facility: Racetrack 
Comments: The index horses was euthanized on 1/22/2023 due to progressing symptoms and poor quality of life. An official quarantine was placed on barn 21 housing 174 exposed horses. A minimum 21 day countdown beginning on 1/21/2023 has been set, a logged twice daily temperature check has been implemented, along with biosecurity measures including footbaths and PPE. Gulfstream Park has instituted security around the barn with limited access and erected a fenced perimeter around the barn. The 2023 Pegasus World Cup will continue as scheduled, none of the exposed horses will be participating in the event. Horses that previously left the facility during the previous 14 days were identified, owners/trainers were informed and advised to isolate and conduct twice daily temperature checks. All states with traces have been contacted.; 
Previous Alerts: 2875

Equine Herpesvirus- Neurologic
Broward County, FL
Outbreak Identifier: 5483
Alert ID: 2875
January 23, 2023
Confirmed Case(s) - Official Quarantine

Florida Department Agriculture and Consumer Services

Number Confirmed: 1; 
Number Exposed: 174; 
Facility Type: Racetrack; 
Age: 5; Gender: Stallion; Onset of Clinical Signs: 1/21/2023;
Clinical Signs: No tail tone, Recumbent; Confirmation Date: 1/22/2023; Horse Status: Euthanized; 
Comments: This is the 1st confirmed case of Equine Herpes Myeloencephalopathy for Florida in 2023. For more information go to: https://www.equinediseasecc.org/equine-herpesvirus

Equine Herpesvirus- Neurologic
Roanoke County, VA
Outbreak Identifier: 5481
Alert ID: 2873
January 20, 2023
Confirmed Case(s) - Official Quarantine

State Department of Agriculture

Number Confirmed:
Number Suspected:
Number Exposed: 28 
Facility Type: Stable
Comments: Three horses at a stable in Roanoke County have been confirmed positive for EHM. Two additional cases are suspected. No horses have traveled from the facility in the last six weeks. For more information go to: https://www.equinediseasecc.org/equine-herpesvirus

Equine Herpesvirus- Neurologic
Dakota County, MN
Outbreak Identifier: 5477
Alert ID: 2869
January 17, 2023
Confirmed Case(s) - Official Quarantine

State Animal Health Official

Number Confirmed: 1; 
Number Exposed: 165; 
Age: 8; Gender: Gelding; Breed: Grade Pony; Onset of Clinical Signs: 1/10/2023;
Clinical Signs: Ataxia, urinary incontinence; Confirmation Date: 1/13/2023; Horse Status: Recovering;
Comments: A horse in Dakota County has tested positive for EHM. For more information go to: https://www.equinediseasecc.org/equine-herpesvirus

Equine Herpesvirus- Neurologic
Riverside County, CA
Outbreak Identifier: 5455
Alert ID: 2866
January 13, 2023
Quarantine Released

California Department of Food and Agriculture

Number Confirmed: 1
Number Exposed: 4
Comments: No additional cases were confirmed. The quarantine has been released.
Previous Alerts: 2848

Equine Herpesvirus- Neurologic
Region of Waterloo, ON
Outbreak Identifier: 5474
Alert ID: 2864
January 10, 2023
Confirmed Case(s) - Voluntary Quarantine

Ontario Ministry of Agriculture, Food and Rural Affairs

Number Confirmed:
Facility Type: Stable
Comments: On January 5th, 2023, the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) was notified of a confirmed case of equine herpes myeloencephalopathy (EHM), caused by equine herpesvirus-1 (EHV-1) infection, at a premises in the Region of Waterloo. A mature mare was examined and treated by a veterinarian after presenting with incoordination, which rapidly deteriorated. The premises is under veterinary supervision, including biosecurity protocols, and voluntary movement restrictions have been implemented by the facility manager. For more information about EHM go to: https://www.equinediseasecc.org/equine-herpesvirus

Equine Herpesvirus- Neurologic
Washington County, MN
Outbreak Identifier: 5470
Alert ID: 2860
January 07, 2023
Confirmed Case(s) - Official Quarantine

State Animal Health Official

Number Confirmed: 1; 
Number Exposed: 25; 
Age: 25; Gender: Gelding; Breed: Dutchwarmblood Cross; Onset of Clinical Signs: 12/28/2022;
Clinical Signs: Rear limb weakness Ataxia Dribbling urine; Confirmation Date: 1/5/2023; Horse Status: Euthanized; For more information go to https://www.equinediseasecc.org/equine-herpesvirus.

Equine Herpesvirus- Neurologic
Shelby and Madison County, IN
Outbreak Identifier: 5443
Alert ID: 2850
December 28, 2022
Quarantine Released

Indiana State Board of Animal Health

Number Confirmed:
Number Exposed: 39 
Comments: Both quarantines placed in response to the diagnosis of EHV-1 in a standardbred filly on 12/6/2022 have been released as of today, 12/28/2022, with no related clinical signs noted in any of the 39 exposed horses during the duration of the quarantine.; 
Previous Alerts: 2832

Equine Herpesvirus- Neurologic
Jefferson County, KY
Outbreak Identifier: 5434
Alert ID: 2849
December 27, 2022
Quarantine Released

Kentucky Department of Agriculture

Number Confirmed: 1; 
Comments: Last night (12/26/2022) last horses on the backside of Churchill Downs were released from the EHV1 quarantine. There are currently no quarantines or movement restrictions in place at Churchill Downs. Horses meeting established exit requirements are allowed to depart Churchill.
Previous Alerts: 2840, 2837, 2826, 2821, 2820