Eastern Equine Encephalitis
Contact Info
Infectious Disease Epidemiology, Prevention and Control Division
651-201-5414
About Eastern Equine Encephalitis
On this page:
Fact Sheet
Transmission
Prevention
Signs and symptoms
Fact Sheet
- Eastern Equine Encephalitis Fact Sheet
Answers to frequently asked questions about eastern equine encephalitis.
Transmission
Eastern equine encephalitis is one of several mosquitoborne diseases that have been seen in Minnesota.
Prevention
Preventing Mosquitoborne Diseases
Learn how to minimize your risk to eastern equine encephalitis and other diseases transmitted by mosquitoes.
There is a vaccine available for horses to prevent eastern equine encephalitis. Please contact your veterinarian for vaccine recommendations.
Signs and symptoms
- Eastern equine encephalitis is a rare illness in humans, and only a few cases are reported in the United States each year. Many people are bitten by infected mosquitoes but never develop any symptoms of the illness. Cases of eastern equine encephalitis are more common in children.
- Severe cases of eastern equine encephalitis begin with the sudden onset of headache, high fever, chills, and vomiting. The illness may then progress into disorientation, seizures, and coma. The disease is the most severe mosquito-transmitted disease in the United States with between 50-75% mortality in cases with symptoms, and significant brain damage in about 80% of survivors.
Last Updated: 10/05/2022