The history of Lyme disease has a Wisconsin chapter. It’s still being written.

During the past three decades, Susan Paskewitz, a medical entomologist at UW-Madison, has documented the growing prevalence of ticks in Wisconsin. Paskewitz found that deer ticks, also called black-legged ticks, have moved steadily from northwest to southwest, and then into the central and eventually slowly into the eastern and southern Wisconsin.