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May 1982

Eastern Equine Encephalitis in Michigan

Author Affiliations

Southwestern Michigan Area Health Education Center Stryker Center 1521 Gull Rd Kalamazoo, MI 49001

Arch Neurol. 1982;39(5):322-323. doi:10.1001/archneur.1982.00510170064029

To the Editor.—  To our knowledge, the first human case of eastern equine encephalitis (EEE), outside the eastern and Gulf Coast states, occurred in southwestern Michigan in August 1980. It occurred against a background of an epizootic in horses and an increase in EEE viral activity in wild birds and mosquitoes. The mosquito population in southwest Michigan was estimated to be at ten times its normal number because of an exceptionally heavy rainfall for the months of June through September.

Report of a Case.—  Seventy-two clinical equine cases of EEE were identified in southwest Michigan by September 1980.1 During this outbreak, a 13-year-old boy was hospitalized with fever, seizures, and encephalitis. His neurologic deficit progressed from dulled mentation to coma, with a focal motor deficit on the left side within 24 hours. On the third day of hospitalization, severe nonpitting edema developed on the patient's feet and hands. The

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