From late spring to early fall, the LCHD Environmental Health Division collects and analyzes various species of mosquitoes.  We are primarily looking for species of mosquitoes that can carry Eastern Equine Encephalitis (EEE).  Although our focus is EEE, mosquitoes that are sent to the State lab are tested for EEE as well as other mosquito-borne diseases including West Nile Virus and Jamestown Canyon Virus. The purpose of the mosquito surveillance is to identify species of mosquitoes carrying these viruses, quantify mosquito numbers, determine the proportion of which species are infected, and make an assessment of potential human risk. These viruses have been responsible for illnesses requiring hospitalization of over a hundred people in Michigan, with several deaths. Some of these viruses have also caused equine illness with over 200 horse deaths confirmed.

Mosquito Bite Prevention

  • Use EPA registered insect repellent with either at least 25% DEET content, picaridin, oil of lemon eucalyptus (OLE) or visit EPA’s site to Find the Repellant that is Right for You
  • Cover exposed skin when able
  • Remove any standing water from property
  • Avoid areas with high insect concentration during dusk and dawn from spring to fall

Last Modified February 27, 2024

Livingston County Health Department Logo
Matt Bolang

Matt Bolang
Health Officer


(517) 546-9850


Monday – Friday
8:00 a.m. – 5:00 p.m.
Closed County Holidays


2300 E Grand River Ave
Suite 102
Howell, MI 48843


(517) 546-6995