Outbreak Alert: August 29, 2021 – West Nile Virus in Malheur County, OR

Equine Herpesvirus- Neurologic

Source: Idaho Department of Agriculture and Oregon Department of Agriculture Number Confirmed: 1; Number Exposed: 30; Facility Type: Private Facility; Age: 15; Gender: Mare; Breed: Paint; Onset of Clinical Signs: 8/24/2021; Clinical Signs: facial/skin fasciculations, tachycardia, tachypnea, Hyperesthetic muzzle; Confirmation Date: 8/27/2021; Horse Status: Affected And Alive; Vaccination Status: Status …

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Outbreak Alert: August 27, 2021 – West Nile Virus in multiple counties in ID, CO, CA

Equine Herpesvirus- Neurologic

West Nile Virus in Malheur County, ID Source: Idaho Department of Agriculture Number Confirmed: 1; Number Exposed: 30; Facility Type: Private Facility; Age: 15; Gender: Mare; Breed: Paint; Onset of Clinical Signs: 8/24/2021; Clinical Signs: facial/skin fasciculations, tachycardia, tachypnea, Hyperesthetic muzzle; Confirmation Date: 8/27/2021; Horse Status: Affected And Alive; Vaccination …

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Outbreak Alert: August 20, 2021 – West Nile Virus in Blaine County, ID

Equine Herpesvirus- Neurologic

Source: Idaho State Department of Agriculture Number Confirmed: 1; Facility Type: Farm; Age: 9; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/13/2021; Clinical Signs: Severe Ataxia, Abrasions on Limbs from Being Down; Confirmation Date: 8/20/2021; Horse Status: Recovering; Vaccination Status: Unvaccinated; Notes: For more information about WNV …

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Outbreak Alert: August 16, 2021 – West Nile Virus in Sacramento County, CA & Potomac Horse Fever in Franklin County, WA

Equine Herpesvirus- Neurologic

West Nile Virus in Sacramento County, CA Source: California Department of Food and Agriculture Number Confirmed: 1; Facility Type: Private Facility; Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/10/2021; Clinical Signs: Hind limb ataxia, Inappetance, Distal Limb Edema; Confirmation Date: 8/16/2021; Horse Status: Affected And …

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Outbreak Alert: August 14, 2021 – West Nile Virus in Lemhi County, ID

Equine Herpesvirus- Neurologic

Source: Idaho State Department of Agriculture Number Confirmed: 1; Number Exposed: 10; Facility Type: Private Facility; Age: 14; Gender: Mare; Breed: Quarter Horse Cross; Onset of Clinical Signs: 8/10/2021; Clinical Signs: Difficulty Standing, Facial Paralysis, Neurologic Signs- Severe, Recumbent; Confirmation Date: 10/13/2021; Horse Status: Euthanized; Vaccination Status: Unvaccinated; Notes: The …

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Outbreak Alert: August 12, 2021 – Equine Herpesvirus-Neurologic in Sonoma and Sacramento Counties, CA

Equine Herpesvirus- Neurologic

Source: California Department of Food and Agriculture Number Confirmed: 7; Number Suspected: 6; Number Exposed: 0; Facility Type: Showgrounds; Notes:  Update 8/12/2021: original alerts 2139, 2141, 2145, 2146, and 2151; No additional cases or clinical signs at the Sonoma County event center or the Sacramento County origin premises have been …

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Outbreak Alert: August 11, 2021 – West Nile Virus in Twin Falls County, ID

Equine Herpesvirus- Neurologic

Source: Idaho State Department of Agriculture Number Confirmed: 1; Facility Type: Private Facility; Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/24/2021; Clinical Signs: Ataxia, Muscle Fasciculations; Confirmation Date: 8/6/2021; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated; Notes: A horse at a private facility in …

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Outbreak Alert: August 7, 2021 – West Nile Virus in Yakima and Kittitas Counties, WA & Fresno County, CA

Equine Herpesvirus- Neurologic

Source: State Veterinarian Yakima County Number Confirmed: 1; Facility Type: Private Facility; Horse Status: Deceased; Vaccination Status: Unvaccinated; Yakima County Number Confirmed: 1; Number Exposed: Not Reported; Facility Type: Private Facility; Horse Status: Affected and Alive Vaccination Status: Undervaccinated; Kittitas County Number Confirmed: 1; Number Suspected: Not Reported; Number Exposed: …

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Outbreak Alert: August 5, 2021 – Equine Herpesvirus-Neurologic in Sonoma County, CA

Equine Herpesvirus- Neurologic

Source: California Department of Food and Agriculture Number Confirmed: 7; Number Suspected: 6; Number Exposed: 0; Facility Type: Showgrounds; Age: 6; Gender: Mare; Breed: Warmblood (WB); Onset of Clinical Signs: 7/23/2021;  Clinical Signs: Hind-end Weakness, limb edema, Nystagmus, Recumbency; Confirmation Date: 7/24/2021; Horse Status: Euthanized; Vaccination Status: Vaccinated; Notes: Update …

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Outbreak Alert: July 31, 2021 – West Nile Virus – Weld County, CO

Equine Herpesvirus- Neurologic

Outbreak Alert: July 31, 2021 – West Nile Virus, Weld County, CO Source: Colorado Department or Agriculture Number Confirmed: 1; Clinical Signs: Neurologic Signs;   Vaccination Status: Unvaccinated; Notes: A horse residing in Weld County has been diagnosed with West Nile Virus (WNV), marking Colorado’s first confirmed equine WNV case in 2021. The horse, which had …

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