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
Davis and Union Counties, IA
Alert ID: 1283
July 02, 2019

Iowa State Department of Agriculture and Land Stewardship

Location: Davis CountyIO

Number Confirmed: 1;
Number Exposed: 1;
Age: 15; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 6/24/2019;
Clinical Signs: Hind limb ataxia, Muscle Fasciculations; Confirmation Date: 6/28/2019; Horse Status: Recovering; Vaccination Status: Undervaccinated;
Notes: The Iowa State Veterinarian confirmed 1 case of West Nile Virus. On June 24, 2019 a 15-year old Thoroughbred mare in Davis county had hind-quarter ataxia and muscle fasciculations. The horse is being treated and reported recovering. The mare was not vaccinated for WNV this year but has a history of vaccination two years ago.;

Location: Union County

Number Confirmed: 1;
Number Exposed: Not Reported;
Age: Not Reported; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: Not Reported;
Clinical Signs: Not Reported; Confirmation Date: 6/19/2019; Horse Status: Recovering; Vaccination Status: Unvaccinated;
Notes: The Iowa State Veterinarian has confirmed 1 case of West Nile Virus (WNV). On June 19, 2019, a 2-year old Quarter horse gelding in Union County tested positive for WNV. The gelding was displaying mild clinical signs and had no history of vaccination against WNV. ;
Search for County