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.

Maricopa County, AZ
Alert ID: 842
February 26, 2018

Arizona Department of Agriculture

The Arizona Department of Agriculture has confirmed a case of equine herpesvirus myeloencephalopathy in a Quarter Horse in Maricopa County. Clinical signs included fever, ataxia, and  neurological symptoms. The affected horse was confirmed positive for EHV-1.  The premise is under quarantine and strict biosecurity is being followed. The epidemiological investigation is ongoing.