Donate to the EDCC
Sign up for Email Alerts

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.

Alert ID: 1568
January 28, 2020
Equine Herpesvirus- Neurologic
Remington Park Racetrack, Oklahoma County, OK
Quarantine Released
Source: Oklahoma Department of Agriculture

Number Confirmed: 17;

Number alive: 16
Number Exposed: 120;
Notes: Update 1/28/2020: The last 3 horses at Remington Park were released from quarantine. These horses completed 14 days with no exposure to an EHV-1 positive horse, no fevers, no symptoms compatible with EHV-1, and two negative tests 7 days apart. Two additional horses remain quarantined at the owners premises and will complete the release protocol there. 

Alert ID: 1567
January 22, 2020
Equine Herpesvirus- Neurologic
Bottineau County, ND
Outbreak Update
Source: North Dakota State Veterinarian, Board of Animal Health

Number Confirmed: 1;
Number Exposed: 150;
Update 1/13/20: As of January 10, the group of 150 horses is still under quarantine. Eight EHM cases have been identified (2 laboratory confirmed and 6 presumptive). Of these, 2 horses died, 3 were euthanized, and 3 horses are recovering with mild neurologic signs of hindlimb ataxia and/or urine dribbling. There have also been 4 abortions reported during this time period including one of the EHM horses that died. None of the mares or foals on the property are vaccinated. Prior to the outbreak, on October 29, the North Dakota Board of Animal Health was notified by Brand Inspection of a shipment of bucking horses that had been moved interstate into North Dakota without a health certificate, Coggin’s testing or brand certificate. The group of mares currently exhibiting neurologic signs are maintained on pasture 1/4 mile away from the location in Bottineau County where the illegally imported horses had been held.

Alert ID: 1566
January 22, 2020
Equine Herpesvirus- Neurologic
Santa Barbara County, CA
Outbreak Update
Source: California Department of Food and Agriculture

Number Confirmed: 3;
Number Exposed: 2;
Gender: Gelding; Breed: Miniature Horse; Onset of Clinical Signs: 1/13/2020;
Clinical Signs: Fever; Confirmation Date: 1/21/2020; Horse Status: Affected and Alive;
Notes: Update 1/22/2020: An exposed horse on the quarantined Santa Barbara premise has been confirmed positive for Equine Herpesvirus-1. The aged miniature horse gelding displayed a fever and is recovering. CDFA continues to monitor the situation.;

Alert ID: 1565
January 21, 2020
Equine Herpesvirus- Neurologic
Remington Park Racetrack, Oklahoma County, OK
Outbreak Update
Source: Oklahoma Department of Agriculture

Number Confirmed: 14;
Number Exposed: 120;
Notes: Update 1/21/2020-- An additional 4 horses were released from quarantine. These horses completed 14 days with no exposure to an EHV-1 positive horse, no fevers, no symptoms compatible with EHV-1, and two negative tests 7 days apart. Three horses remain in quarantine at Remington Park in the Isolation Barn. Two horses are quarantined at the owners premises and will complete the release protocol there. Enhanced biosecurity measures and twice daily temperature monitoring is in place. ODAFF personnel are on-site and continue to monitor the situation.;

Alert ID: 1564
January 21, 2020
Equine Herpesvirus- Neurologic
San Bernandino, CA
Quarantine Released
Source: California Department of Food and Agriculture

Number Confirmed: 10;
Number Exposed: 11;
Horse Status: 7 alive; 
Notes: Update 1/21/2020- All positive horses on the quarantined premise have had two (2) negative tests seven (7) days apart. The quarantine has been released. There are no EHV quarantines currently in San Bernardino County.

Alert ID: 1563
January 16, 2020
Equine Herpesvirus- Neurologic
Polk County, WI
Confirmed case(s): Official Quarantine
Source: Wisconsin Department of Agriculture

Number Confirmed: 1;
Number Exposed: 4;
Age: 6; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 12/31/2019;
Clinical Signs: Ataxia, Urine Dribbling, No Tail Tone, Became Non-Ambulatory; Confirmation Date: 1/6/2020; Horse Status: Euthanized; Vaccination Status: Not Reported;
Notes: Enhanced biosecurity has been implemented; twice daily temperature monitoring of exposed horses.;

Alert ID: 1562
January 15, 2020
Equine Herpesvirus- Neurologic
Remington Park Racetrack, Oklahoma County, OK
Outbreak Update
Source: Oklahoma Department of Agriculture

Number Confirmed: 17;
Number Alive; 16
Number Exposed: ~ 120;
Notes: Update 1/15/2020 An additional 10 horses were released from quarantine. These horses completed 14 days with no exposure to an EHV-1 positive horse, no fevers, no symptoms compatible with EHV-1, and two negative tests 7 days apart. 7 horses remain in quarantine at Remington Park, 3 of these are in the Isolation Barn, and 2 horses are quarantined at the owners premises and will complete the release protocol there. Enhanced biosecurity measures and twice daily temperature monitoring is in place. ODAFF personnel are on-site and continue to monitor the situation.;

Alert ID: 1561
January 14, 2020
Equine Herpesvirus- Abortion
Simcoe County, ON
Suspected Case(s): Voluntary Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

Number Confirmed: 2;
Notes: On January 6th, 2020 OMAFRA was notified of two cases of equine abortion in Simcoe County. Both cases were confirmed to be caused by equine herpesvirus-1 (EHV-1). Both mares aborted during their 10th month of pregnancy and both arrived from an out of province location in December. A third mare was exposed to the infected mares but has remained unaffected. The farm manager was proactive and kept the new mares separate from the resident mares and in a small group. This type of management procedure reduces the risk of spreading the virus to the entire herd. Working with their veterinarian, the farm manager has isolated the affected mares and has voluntarily placed the premises under quarantine to reduce the risk of viral spread.;

Alert ID: 1560
January 10, 2020
Equine Herpesvirus- Neurologic
Santa Barbara County, CA
Confirmed case(s): Official Quarantine
Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: 2;
Age: 21; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 1/4/2020;
Clinical Signs: Ataxia, Fever, Recumbency; Confirmation Date: 1/9/2020; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
Notes: A 21-year-old Quarter Horse gelding in Santa Barbara county displaying neurologic signs and fever has been confirmed positive for Equine Herpesvirus-1. On January 9,2020, the gelding was euthanized due to severity of signs. The index premises with two remaining horses has been quarantined with requirements for enhanced biosecurity measures including twice daily temperature monitoring. There has been no recent movement of horses on or off the property. CDFA will continue to monitor the situation.;

Alert ID: 1559
January 10, 2020
Equine Herpesvirus- Neurologic
Remington Park Racetrack, Oklahoma County, OK
Outbreak Update
Source: Oklahoma Department of Agriculture

Number Confirmed: 17

Number Alive: 16
Number Exposed: ~120
Update 1/10/2020: On Friday January 10 an additional 2 horses were released from quarantine. These horses completed 14 days with no exposure to an EHV-1 positive horse, no fevers, no symptoms compatible with EHV-1, and two negative tests 7 days apart. These horses were from the second quarantine barn but were moved to separate barns after the race meet ended. 17 horses remain in quarantine at Remington Park, 3 of these are in the Isolation Barn. Enhanced biosecurity measures and twice daily temperature monitoring is in place. ODAFF personnel are on-site and continue to monitor the situation.;