Welcome

This site will provide information on ticks and tick-borne disease in Wisconsin.  Please use the drop-down menus above to find the information most relevant to you.

Adult deer ticks are active now (June, 2016) and will be out until mid-Summer. Nymphs are also very active and will be out until at least August/September.  Immature ticks (nymphs and larvae) are hard to see and nymphs probably are responsible for most of the disease transmission.

Deer ticks are widely distributed in Wisconsin.  Here is a map showing counties where they have been collected through an animal surveillance project.  Most of the white counties are also positive for deer ticks through other surveillance methods.  This means that anywhere in the state where there are woods, deer and mice, the deer tick can now be found.

SWAT Ixodes 2014

IXO SCA F & M and DER VAR F & M

Figure 1.  Adult deer ticks (top row) and wood ticks (bottom row).  Females are on the left and males on the right.

AMB AME MALE & FEMALEThese are male and female lone star ticks (Amblyomma americanum).  We are interested in receiving specimens that were picked up in Wisconsin, especially if the approximate location can be identified.  Please contact smpaskew@wisc.edu if you find one.  See the page on Amblyomma under Wisconsin ticks  for more information.