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August 25th, 2023
The Northwest Horse Source
The Northwest Horse Source is your all breed, all discipline resource covering the care, training, keeping and enjoyment of horses. Check out the latest Outbreak Alerts!
Potomac Horse Fever
This alert is an equine related disease outbreak or other emergency, disaster, or critical announcement in our distribution area. Alerts regularly include Washington, Oregon, Idaho, California, and sometimes Utah, Montana, Nevada, Wyoming and Arizona.

Copy of Outbreak Alerts: August 25, 2023 West Nile Virus in Orange County, CA

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1
Number Exposed: Unknown
Age: Yearling
Gender: Colt
Breed: Mustang
Onset of Clinical Signs: 8/19/2023
Clinical Signs: Ataxia and dysphagia, progressive recumbency, cranial nerve deficits.
Confirmation Date: 8/23/2023
Horse Status: Affected And Alive
Vaccination Status: Unvaccinated
Comments: This is the 13th case confirmed of equine WNV in California in 2023.

For more information, go to: https://www.cdfa.ca.gov/ahfss/Animal_Health/WNV_Info.html

See past published Outbreak Alerts: http://nwhorsesource.com/category/news/alerts

Outbreak Alerts: August 24, 2023 West Nile Virus in Canyon County, ID - 70 Exposed!

Confirmed Case(s) - No Quarantine

Source: State Veterinarian

Number Confirmed: 1
Number Exposed: 70
Facility Type: Private Facility
Age: 20
Gender: Gelding
Breed: Quarter Horse (QH)
Onset of Clinical Signs: 8/18/2023
Clinical Signs: Acutely neurologic 3/5; muscle fasciculations
Confirmation Date: 8/23/2023
Horse Status: Recovering
Vaccination Status: Undervaccinated

Comments: Horse resides at large equine facility with horses of all ages. No other horses on the facility have demonstrated symptoms consistent with WNv, to-date.

See past published Outbreak Alerts: http://nwhorsesource.com/category/news/alerts

Outbreak Alerts: August 24, 2023 West Nile Virus in Canyon County, ID

Confirmed Case(s) - No Quarantine

Source: State Veterinarian

Number Confirmed: 1
Number Exposed: 2
Facility Type: Private Facility
Age: Yearling
Gender: Filly
Breed: Quarter Horse (QH)
Onset of Clinical Signs: 8/18/2023
Clinical Signs: Neurologic 2/5, muscle fasciculations
Confirmation Date: 8/23/2023
Horse Status: Recovering
Vaccination Status: Unvaccinated

See past published Outbreak Alerts: http://nwhorsesource.com/category/news/alerts

Outbreak Alerts: August 23, 2023 West Nile Virus in Merced County, CA

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1
Number Exposed: Unknown
Age: 2
Gender: Gelding
Breed: Quarter Horse (QH)
Onset of Clinical Signs: 8/10/2023
Clinical Signs: Grade 3-4 ataxia, somnolence, muscle fasciculations, low grade fever. Neurological signs improved but patient was subsequently euthanized due to comorbidities.
Confirmation Date: 8/18/2023
Horse Status: Euthanized
Vaccination Status: Vaccinated
Comments: This is the 11th case confirmed of equine WNV in California in 2023.

For more information, go to: https://www.cdfa.ca.gov/ahfss/Animal_Health/WNV_Info.html

See past published Outbreak Alerts: http://nwhorsesource.com/category/news/alerts

Outbreak Alerts: August 22, 2023 West Nile Virus in Canyon County, ID

Confirmed Case(s) - No Quarantine

Source: State Veterinarian

Number Confirmed: 1
Number Exposed: 4
Age: 5
Gender: Gelding
Breed: Quarter Horse (QH)
Onset of Clinical Signs: 8/16/2023
Clinical Signs: Fever, muscle fasiculations.
Horse Status: Affected And Alive
Vaccination Status: Unvaccinated

See past published Outbreak Alerts: http://nwhorsesource.com/category/news/alerts

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