A Cass County resident has contracted Eastern Equine Encephalitis, according to the Michigan Department of Health and Human Services.

The onset date for the Cass County resident's case was September 20, before aerial spraying began, according to the health department.

"In one year, we have had more human EEE cases confirmed than in the past decade,” said Dr. Joneigh Khaldun, chief medical executive and chief deputy for health for MDHHS. “We chose to conduct aerial treatment to protect the health and safety of Michiganders. We also continue to urge communities and residents to take precautions against mosquito bites as the risk of EEE remains until the first hard frost.”

Aerial spraying was conducted in portions of Allegan, Barry, Berrien, Calhoun, Cass, Jackson, Kent, Lapeer, Livingston, Montcalm, Newaygo, St. Joseph, Van Buren and Washtenaw counties.

EEE has been confirmed in 10 people, with four fatalities. Cases resided in Barry, Berrien, Calhoun, Cass, Kalamazoo and Van Buren counties.

Cases have occurred in 34 animals from 15 counties: Allegan, Barry, Berrien, Calhoun, Cass, Genesee, Jackson, Kalamazoo, Kent, Lapeer, Livingston, Montcalm, Newaygo, St. Joseph and Van Buren.

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 the bite of a mosquito carrying the virus.

The state does not plan to conduct any additional spraying due to weather conditions.

Residents should continue to protect themselves from mosquito bites by:

• Avoiding being outdoors from dusk to dawn when mosquitoes that carry the EEE virus are most active.
• Applying insect repellents that contain the active ingredient DEET, or other U.S. Environmental Protection Agency-registered product to exposed skin or clothing, and always follow the manufacturer’s directions for use.
• Wearing long-sleeved shirts and long pants when outdoors. Apply insect repellent to clothing to help prevent bites.
• Maintaining window and door screening to help keep mosquitoes outside.
• Emptying water from mosquito breeding sites around the home, such as buckets, unused kiddie pools, old tires or similar sites where mosquitoes may lay eggs.
• Using nets and/or fans over outdoor eating areas.