Welcome to the UW-Madison Medical Entomology Lab (MEL) Mosquito site! This site is intended to be a resource about mosquitoes in Wisconsin, the diseases they may be carrying, and science-based information on methods to keep them from biting you.

2018 nuisance mosquito updates: Numbers were heading back up last week.  The first two weeks in July are often high mosquito weeks.

2018 West Nile virus updates:  We have detected positive mosquitoes in both locations (Milwaukee area and Madison area) where we test pools of Culex mosquitoes.  These are likely the bird feeding species, Culex restuans, and the risk to humans is low.

Watch for the daytime biter Aedes albopictus, first detected in Wisconsin last year (see below-white line on thorax is a good clue).  If you catch one, get in touch as we are tracking the ways these may be introduced into Wisconsin.