West Nile Virus
Grand County, CO
Alert ID: 5193
October 01, 2026
Confirmed Case(s) - No Quarantine

State Veterinarian's Office

Number Confirmed: 1; 
Number Exposed: 210; 
Number Euthanized: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 24; Gender: Mare; Breed: Quarter Horse (QH); Usage: farm/ranch; Onset of Clinical Signs: 9/24/2026; Clinical Signs: Weakness Ataxia Teeth Grinding Abnormal Mentation Unable to Rise Fasciculation; Confirmation Date: 9/30/2026; Horse Status: Euthanized; Vaccination Status: Vaccinated;