Disease Alerts

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: 28;
Facility Type: Private Facility;
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/8/2022;
Clinical Signs: fever, ataxia, trouble urinating; Confirmation Date: 8/10/2022; Horse Status: Affected And Alive;
Comments: A 8-year-old Quarter Horse gelding originating in Merced county displaying respiratory and neurological signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (NEHV-1, neuropathogenic strain) on August 10th. The gelding is currently quarantined in isolation under veterinary care at an offsite hospital. Twenty-eight (28) potentially exposed horses on the home premises were quarantined on August 11th. Neither the index horse nor any horses on the property have had any recent show or travel history. CDFA will assist the home premises in conducting a site assessment and implementing enhanced biosecurity measures, including twice daily temperature monitoring. For more information about EHM go to: EHM factsheet. 

Source: Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA)

Number Confirmed: 1;
Facility Type: Private Facility;
Comments: 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 an equine facility in Wellington County. EHV-1 does not pose a threat to public health or food safety. A mature gelding was euthanized after showing incoordination, which rapidly progressed. This gelding had not been off the property for several years. The facility is under veterinary supervision and biosecurity protocols and voluntary movement restrictions have been implemented by the facility manager. Other horses from the facility had recently competed at an eventing competition in Simcoe County. None of these horses have shown signs of EHM. The risk to other horses competing at the event is considered low given that the horses from the affected facility were maintained at their trailers with limited interaction with other horses or competitors during the event. Out of an abundance of caution, owners or custodians of horses attending the event should monitor the health of their horses, including rectal temperature, and contact their veterinarian if concerned. Health monitoring should be done for all competition horses regardless of discipline.;

Source: State Veterinarian's Office

Number Confirmed: 1;
Facility Type: Training Facility;
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/20/2022;
Clinical Signs:  Weakness Ataxia History Progressive neurologic symptoms over past 2-3 weeks; first observed occasional stumbling which progressed to intermittent ataxic/buckling legs when standing and walking. Confirmation Date: 8/4/2022; Horse Status: Recovering; Vaccination Status: Status Unknown;
Notes: A horse in Weld County has tested positive for West Nile Virus. For more information about West Nile Virus go to: West Nile Virus factsheet. 

Source: Florida Department Agriculture and Consumer Services

Number Confirmed: 1;
Number Exposed: 1;
Facility Type: Horse Rescue;
Age: 17; Gender: Mare; Breed: Miniature Horse; Usage: Pleasure Riding; Onset of Clinical Signs: 7/25/2022;
Clinical Signs: Mucopurulent Nasal Discharge; Confirmation Date: 8/5/2022; Horse Status: Quarantined; Vaccination Status: Status Unknown;
Comments: This is the 40th confirmed case of Strangles for Florida in 2022.;
Notes: A horse in Osceola County has tested positive for Strangles. For more information about Strangles go to: Strangles factsheet. 

Source: Michigan Department of Agriculture and Rural Development

Number Confirmed: 1;
Number Suspected: 2;
Number Exposed: 2;
Age: 19; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/31/2022;
Clinical Signs: Fever, nasal discharge; Confirmation Date: 8/5/2022; Horse Status: Recovering; Vaccination Status: Vaccinated;
Comments: New horse added to the property in the prior 30 days, bringing the total number of horses at the property to five. Thus far, three horses at the property are ill.;
Notes: A horse in Ionia County has tested positive for Strangles. For more information about Strangles go to: Strangles factsheet. 

Source: Attending Veterinarian

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Boarding Facility;
Notes: A horse in Fairfax County has tested positive for Potomac Horse Fever. For more information about Potomac Horse Fever go to: PHF factsheet. 

Source: State vet office.

Number Confirmed: 1;
Number Suspected: Unknown;
Number Exposed: Unknown;
Facility Type: Boarding Facility;
Comments: Some Private vets working with facility on biosecurity. For more information go to Strangles factsheet.

Source: State vet office.

Number Confirmed: 1;
Number Suspected: Unknown;
Number Exposed: Unknown;
Facility Type: Private Facility;
Comments: Private vet working with owner on biosecurity and disease mgmt. For more information go to Strangles factsheet.

Source: Canadian Food Inspection Agency

Number Confirmed: 1;
Comments: On July 29, 2022, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for a horse located on a premises in Peace River C, British Columbia. The owner requested an accredited veterinarian test the horse for EIA because it was exhibiting clinical signs compatible with the disease and a riding facility that they use for a herd mate requested the new horse be tested. The infected horse had been rescued by the current owners in early spring of this year from another premises in the province. A CFIA investigation is underway and as per program policy, movement controls have been placed on the infected horse and any on-premises contact animals. Initial reports indicate there are other equines on the affected premises. Movement controls will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of confirmed cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current policy. Improved biosecurity protocols have been strongly recommended to the owners to help control the ongoing spread of EIA and protect our national herd. For more information go to EIA factsheet.

Source: CDFA

Number Confirmed: 1;
Number Exposed: 1;
Facility Type: Private Facility;
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 8/1/2022; Horse Status: Quarantined;
Comments: On August 1, a 4 yr old QH gelding was confirmed positive for EIA following testing to return to the racetrack. Exposure was very likely iatrogenic through reuse of needles. The gelding and one additional pregnant mare at the index premises have been quarantined. Testing is pending for the potentially exposed mare and epidemiological tracing is ongoing. For more information go to EIA factsheet.