Disease Alerts

Source: Canadian Animal Health Surveillance System

Number Confirmed: 1;
Comments: On September 16, 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 Leduc County, Alberta. The horse had been tested by an accredited veterinarian at the owner’s request because it was exhibiting clinical signs compatible with EIA infection. For humane reasons, it had to be euthanized shortly after sampling due to its rapidly deteriorating condition. It was reported that the horse had been moved to three different properties within the last year while exhibiting clinical signs. A CFIA investigation is underway and, as per program policy, movement controls have been placed on the on-premises contact animals. Initial reports indicate there are several 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 about EIA go to: EIA factsheet. 

Source: Michigan Department of Agriculture and Rural Development

Number Confirmed: 1;
Number Suspected: 2;
Number Exposed: 2;
Age: Yearling; Gender: Filly; Breed: Quarter Horse Cross; Onset of Clinical Signs: 9/1/2022;
Clinical Signs: Nasal discharge, coughing; Confirmation Date: 9/23/2022; Horse Status: Recovering; Vaccination Status: Status Unknown;
Comments: A horse at the property was recently purchased (within the prior month) from a sales barn and added to the herd. For more information go to: Strangles factsheet. 

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Private Facility;
Age: 10; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/3/2022;
Clinical Signs: Shifting weight all 4 limbs, nonspecific discomfort, transient fever, mild bilateral pelvic limb ataxia, increased lip smacking.; Confirmation Date: 9/26/2022; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Comments: A 10-year-old unvaccinated Quarter Horse gelding in Nevada County has tested positive for West Nile Virus.  This is the 10th case of equine WNV in California in 2022, additional information can be found on the CDFA Equine WNV webpage.  For more information go to: WNV factsheet. 

Source: State Veterinarian's Office

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Private Facility;
Comments: A horse in Larimer County has tested positive for West Nile Virus. For more information about West Nile Virus go to: WNV factsheet. 

Source: Indiana State Board of Animal Health

Number Confirmed: 1;
Number Suspected: 1;
Number Exposed: Unknown;
Facility Type: Farm;
Gender: Mare; Breed: Standardbred; Onset of Clinical Signs: 9/2/2022;
Clinical Signs: Mild head-pressing, hind limb ataxia, lethargy, fever; Horse Status: Deceased; Vaccination Status: Unvaccinated;
Comments: On 9/2/2022 an adult standardbred mare presented with mild head-pressing, hind limb ataxia, lethargy and fever. She was not currently vaccinated. She subsequently died, despite supportive treatment, as had one other horse on the premises with a very similar clinical presentation, just prior to the onset of her illness. On 9/23/2022 test results confirmed that she was IgM positive for Eastern Equine Encephalitis virus. The Indiana State Board of Animal Health encourages all equine owners to vaccinate their animals for the mosquito-borne illnesses, as we continue to see these viruses each year. For more information about Eastern Equine Encephalitis (EEE), go to: EEE Factsheet.

Source: Michigan Department of Agriculture and Rural Development

Number Confirmed: 1;
Age: 2; Gender: Gelding; Breed: Paint; Onset of Clinical Signs: 9/8/2022;
Clinical Signs: Leaning, ataxia, stiffness, getting up and down, and rolling when down as well as displaying nystagmus when down; Confirmation Date: 9/22/2022; Horse Status: Euthanized; Vaccination Status: Unvaccinated;
Comments: A horse in Eaton County has tested positive for Eastern Equine Encephalitis. For more information go to: EEE factstheet. 

Source: Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1;
Number Suspected: Unknown;
Number Exposed: Unknown;
Facility Type: Private Facility;
Age: Weanling; Gender: Filly; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/4/2022;
Clinical Signs: Ataxia, hypersensitivity to touch; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Comments: A horse at a private facility in Monroe County has tested positive for West Nile Virus. For more information about West Nile Virus go to: WNV factsheet. 

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Age: 8; Gender: Gelding; Breed: Thoroughbred (TB);
Clinical Signs: ataxia (all 4 limbs), hypermetric in front limbs, down/unable to rise; Confirmation Date: 9/19/2022; Horse Status: Euthanized; Vaccination Status: Vaccinated;
Comments: On September 19, 2022, an 8-year-old vaccinated Thoroughbred gelding in Tulare County, displaying acute neurological signs, was confirmed positive for West Nile Virus. He was euthanized due to the severity of clinical signs. This is the ninth case of equine WNV confirmed in California in 2022. For more information about West Nile Virus go to: WNV factsheet. 

Source: State Animal Health Official

Number Confirmed: 1;
Number Exposed: 20;
Age: 3; Gender: Mare; Breed: Draft-cross; Onset of Clinical Signs: 9/5/2022;
Clinical Signs: Generalized muscle fasciculations and behavioral changes.; Confirmation Date: 9/14/2022; Horse Status: Recovering; Vaccination Status: Unvaccinated;
Comments: A horse in Winona County has tested positive for West Nile Virus. For more information go to: WNV factsheet. 

Source: State Animal Health Official

Number Confirmed: 1;
Number Exposed: 35;
Age: 17; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/29/2022;
Clinical Signs: 1 week history of progressive ataxia and limb edema.; Confirmation Date: 9/15/2022; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Comments: A horse in Mower County has tested positive for West Nile Virus. For more information go to: WNV factsheet.