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.

Shasta County, CA
Alert ID: 979
August 15, 2018

California Department of Food and Agriculture

On August 14,2018, the California Department of Food and Agriculture confirmed the first equine West Nile Virus case for 2018. An unvaccinated four year old Quarter Horse mare in Shasta County displaying severe neurologic signs was confirmed positive for West Nile Virus. Due to the severity of clinical signs, the mare was euthanized. For more information visit https://www.cdfa.ca.gov/ahfss/animal_health/WNV_Info.html .