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Second night of aerial treatment to combat EEE is underway

September 17, 2020
Contact: Lynn Sutfin, 517-241-2112

LANSING, Mich. – A second night of aerial treatment to protect Michiganders from Eastern Equine Encephalitis (EEE) – a potentially deadly mosquito-borne virus affecting both people and animals – is underway announced the Michigan Department of Health and Human Services (MDHHS).

Aerial treatment conducted on Wednesday, Sept. 16, covered more than 157,000 acres in Blocks 4-1, 4-2, 8-1, 9-1, 9-2, 9-3 and 9-4.

The treatment comes as six new cases of EEE in horses increased the total to 28 cases in 11 counties. Impacted counties are now Barry, Clare, Ionia, Isabella, Jackson, Kent, Livingston, Mecosta, Montcalm, Newaygo and Oakland. In addition, there is one suspect case of EEE in a Barry County resident.

The newly discovered EEE cases expand or add treatment blocks to the overall plan in Ionia, Jackson, Kent, Livingston and Montcalm counties.

Areas slated for treatment Thursday night are identified in the Aerial Treatment Zones Map:

  • Block 5-1 in Kent County.
  • Block 6-1 in Newaygo, Oceana and Muskegon counties and 6-2 in Newaygo County.
  • Block 7-1 in Mecosta County.
  • Block 10-1 in Ionia County.

Please refer to the County-level Aerial Treatment Maps for more details of the identified zones’ locations. These schedules are weather dependent and may change. The most up-to-date information will be posted on

All other treatment zones will not be treated this evening.

For more information about EEE, visit

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