Breaking News
National Equine Health Stakeholder Call-October 2026
Learn More

Disease Alerts

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.



1 Week
2 Weeks
1 Month
2 Months
3 Months
3+ Months
No Results

The color range is based off of the selected End Date. If the End Date doesn't have a value it will use Today's Date.

West Nile Virus
Twin Falls County, ID
Outbreak Identifier: 4796
Alert ID: 2161
August 11, 2021
Confirmed Case(s) - No Quarantine

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 Twin Falls County has tested positive for West Nile Virus. There are four horses total on-site; no history of vaccination of any kind. For more information about West Nile Virus go to the WNV factsheet. 
Search for County