Eastern Equine Encephalitis

Eastern equine encephalitis (EEE) is a mosquito-borne viral disease. EEE virus (EEEV) occurs in the eastern half of the United States where it causes disease in humans, horses, and some bird species. Because of the high mortality rate, EEE is regarded as one of the most serious mosquito-borne diseases in the United States.  Many persons infected with EEE will have no obvious symptoms.  In those persons who do develop illness, symptoms of EEE range from  mild-flu like illness to inflammation of the brain, coma and death. 

There is no specific treatment for EEE.  This disease is best prevented by avoiding exposure to mosquitoes. 

Maine has reported two residents with confirmed EEE to date, one in 2014 and one in 2015.  One of the cases was fatal.

On this page:

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Posters and Brochures:

• Mosquitoes and You Poster (PDF*)
• Medical Alert EEE Poster (PDF*)
• EEE brochure (PDF*)

Resources for Maine Residents

• Eastern Equine Encephalitis Q&A
• EEE Fact Sheet (PDF)
• Personal Protection Guide

Resources for Physicians

• Arboviral Testing Form (PDF*)
• HETL directions for Arboviral testing

Regional Maps

• Human Cases (all as pdfs*) 2005  2006  2007  2008  2009  2010  Cumulative
• Animal Aggregated Cases (all as pdfs*) 2005  2006  2007  2008  2009  2010 Cumulative
• Northeast Region Including Canada (pdf*)

Other Vector-borne Diseases

• Anaplasmosis
• Babesiosis
• Chikungunya
• Dengue
• Eastern Equine Encephalitis
• Ehrlichiosis
• Lyme Disease
• Malaria
• Powassan
• RMSF
• West Nile Virus
• Yellow Fever

External Links

• Federal CDC Eastern equine encephalitis (EEE) page