Eastern Equine Encephalitis
2020 EEE Outbreak Information
As of Sept. 22, EEE has been confirmed in 32 animals in 13 counties – 30 equine and two deer. To date, there is one confirmed human case in Barry County. There is an EEE vaccine available for horses, but not for people. Protecting horses with approved EEE vaccines is an important prevention measure.
In an effort to prevent spread of Eastern Equine Encephalitis (EEE), MDHHS has announced plans to conduct aerial mosquito control treatment in certain high-risk areas of Michigan. To prevent the loss of life and protect public health, MDHHS has determined a targeted aerial treatment plan is necessary. When there are high rates of animal infections, humans are just as at risk.
EEE is one of the most dangerous mosquito-borne diseases in the United States, with a 33 percent fatality rate in people who become ill. People can be infected with EEE from one bite of a mosquito carrying the virus. Persons younger than age 15 and over age 50 are at greatest risk of severe disease following infection. More than 25 percent of the nation’s EEE cases last year were diagnosed in Michigan. The risk of bites is highest for people who work and play outdoors in affected areas.
Update for Thursday, September 24
Aerial treatment to help prevent the spread of Eastern Equine Encephalitis resulted in nearly 27,000 acres being treated in Blocks 4-4 and 10-2 on Wednesday, Sept. 23. Nearly 464,000 acres have been treated to date.
At this time, no additional treatment is planned. MDHHS will continue to monitor the situation and treatment zones could be added if new cases of EEE are found.
The most up-to-date information will be posted here at Michigan.gov/EEE.
MDHHS hotline for general EEE questions: 888-535-6136
(Monday through Friday, from 8 a.m. to 5 p.m.)
Arbovirus Daily Update, including Eastern Equine Encephalitis in Michigan (Updated September 23, 2020):