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Wisconsin Ticks and Tick-borne Diseases

Department of Entomology, University of Wisconsin-Madison
  • Home
  • Tick Identification
  • The Tick App
  • Wisconsin Ticks Expand Collapse
    • Tick testing
    • Ixodes scapularis (blacklegged or “deer” tick)
    • Dermacentor variabilis (American dog tick)
    • Amblyomma americanum (Lone star tick)
    • Rhipicephalus sanguineus (brown dog tick)
    • Other tick species found in Wisconsin
    • SWAT
  • Tick-borne Diseases Expand Collapse
    • Lyme Disease ( Borrelia burgdorferi or B. mayonii)
    • Borrelia miyamotoi
    • Anaplasmosis
    • Ehrlichia muris eauclairensis (EML)
    • Human Babesiosis
    • Powassan virus/deer tick virus
    • Ehrlichia chaffeensis
    • Rocky Mountain Spotted Fever
  • Resources for education, surveillance and control Expand Collapse
    • Preventing tick bites at Summer Camps
    • Tick Prevention
    • Tick Removal
    • Targeting mice
    • Yard treatments
    • Slide packs
  • Contact
  • Calendar

Nymphs are tiny!

Click the link to see the rest of the picture.

Updates

May 2023: It's National Lyme Awareness month. As we move into the period when ticks are active, keep an eye out for symptoms like an unexplained large and expanding rash or "summer flu". Check with your physician if you might have been in tick habitat.

April 2023: We just got the earliest nymph we've collected in the state (April 14). Please remember to take precautions!

January 2023: It's unseasonably warm so adult ticks may be active when you don't expect it. Adult deer ticks can be actively looking for a host when temperatures are in the low 40s (or even lower when in a sunny spot). Be sure to check for ticks if you've been in snowless areas and might have brushed the vegetation.

FOR 2023:  We are excited to expand the Tick App to provide reminders about prevention strategies! The Tick App is a smartphone application to study human behavior, tick exposure and the risk of Lyme disease by collecting data through simple surveys with a citizen science approach. 

Latest News

  • Recent Tick Talk now on YouTube

  • New tools for summer camps

  • More News More

Nymphal deer ticks can be in your lawn.  We found lots of them in mowed grass near woods while sampling at home sites in Eau Claire, Wisconsin and near Mirror Lake.

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