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Outbreak Alert: June 14, 2022 – Equine Infectious Anemia Santa Clara and Merced County, CA

Equine Herpesvirus- Neurologic

Source: California Department of Food and Agriculture Number Confirmed: 1;Age: 4; Gender: Mare; Breed: Quarter Horse (QH); Usage: Racing;Confirmation Date: 6/9/2022;Notes: On June 9th, a 4-year-old racing Quarter Horse mare was confirmed positive for Equine Infectious Anemia (EIA). The mare was temporarily residing in Merced County when she was tested …

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Outbreak Alert: June 8, 2022 – EHV-Neurologic in San Mateo CA

Equine Herpesvirus- Neurologic

Source: State vet office. Source: California Department of Food and Agriculture Number Confirmed: 1; Age: 7; Gender: Mare; Breed: Holsteiner; Clinical Signs: fever, mild neurological signs; Confirmation Date: 6/6/2022; Horse Status: Affected And Alive; Vaccination Status: Vaccinated; Notes: A 7-year-old Holsteiner mare in San Mateo County displaying fever followed by mild …

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Outbreak Alert: June 4, 2022 – Strangles in Spokane County, WA

Equine Herpesvirus- Neurologic

Source: State vet office. Confirmed Case – Voluntary Quarantine Number Confirmed: 1; Number Exposed: 2; Facility Type: Boarding Facility; Notes: Under private vet care and biosecurity measures implemented. For more information go to  Strangles factsheet.


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Outbreak Alert: June 2, 2022 – EHV-1 Neurologic in San Mateo County, CA

Equine Herpesvirus- Neurologic

Source: CDFA Number Confirmed: 1; Exposed: 300 Facility Type: Boarding Facility; Age: 19; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 5/28/2022; Clinical Signs: Fever, limb edema, ataxia, recumbency.; Confirmation Date: 6/2/2022; Horse Status: Euthanized; Vaccination Status: Vaccinated; Notes: Additional information available at https://www.cdfa.ca.gov/ahfss/Animal_Health/equine_herpes_virus.html; For more information go to EHM factsheet.


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Outbreak Alert: June 2, 2022 – Equine Herpesvirus Myeloencephalopathy in Clackamas County, Oregon

Equine Herpesvirus- Neurologic

Source: Oregon Department of Agriculture Number Confirmed: 1; Facility Type: Ranch; Notes: A horse from Clackamas County recently tested positive for Equine Herpesvirus (EHV-1). After exhibiting neurologic symptoms, the owners called a private veterinarian to examine the animal and collect a sample for testing. Unfortunately, the horse was later humanely euthanized—a …

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Outbreak Alert: May 25, 2022 – Strangles in Pierce County, WA

Equine Herpesvirus- Neurologic

Source: Washington State Veterinary Office Number Confirmed: 1; Number Exposed: 20; Facility Type: Boarding Facility; Notes: A horse at a boarding facility in Pierce County has tested positive for Strangles. The facility is under a voluntary quarantine and under private vet care. For more information about Strangles go to: Strangles factsheet. Equine …

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Outbreak Alert: May 17, 2022 – Equine Herpesvirus-Neurologic in Deschutes County, OR

Equine Herpesvirus- Neurologic

Source: Oregon Department of Agriculture Number Confirmed: 2; Clinical Signs: Neurologic signs; Horse Status: Euthanized; Vaccination Status: Status Unknown; Notes: A horse from Deschutes County tested positive for Equine Herpesvirus (EHV-1) on May 4, 2022. The horse had recently attended the Oregon Horse Center at the Prairie Arena in Eugene …

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Outbreak Alert: May 5, 2022 – Equine Infectious Anemia in Riverside and Tualre County, CA

Equine Herpesvirus- Neurologic

Source: California Department of Food and Agriculture Number Confirmed: 1; Number Exposed: 61; Age: 3; Gender: Stallion; Breed: Quarter Horse (QH); Confirmation Date: 5/2/2022; Horse Status: Euthanized; Notes: On May 2, 2022, a 3-year-old Quarter Horse stallion was confirmed positive for Equine Infectious Anemia (EIA) while residing in Riverside county. …

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Outbreak Alert: April 21, 2022 – Pigeon Fever in King County, WA

Equine Herpesvirus- Neurologic

Source: Washington State Veterinary Office Number Confirmed: 1; Number Suspected: 1; Facility Type: Private Facility; Notes: A horse at a private facility in King County has tested positive for Pigeon Fever.  The property is working with a private vet to manage case(s). For more information about Pigeon Fever go to: …

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Outbreak Alert: April 19, 2022 – Strangles in Yakima County, WA

Equine Herpesvirus- Neurologic

Source: Washington State Veterinary Office Number Confirmed: 1; Number Suspected: 1; Number Exposed: 10; Facility Type: Boarding Facility; Notes: A horse at a boarding facility in Yakima County has tested positive for Strangles. The property is under a voluntary quarantine and the owner is working with a private vet. For …

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