26/10/2025
University of Illinois Urbana-Champaign scientists analyzed the distribution of three potentially harmful tick species in Illinois, identifying regions of the state with higher numbers of these ticks and, therefore, at greater risk of infection with multiple tick-borne diseases.
The study found that of the three species tracked
▪️Lone star tick, Amblyomma americanum, is most prevalent in southern Illinois
▪️Black-legged tick or deer tick, Ixodes scapularis, is more common in northern and central Illinois
▪️Dog tick, Dermacentor variabilis, dominates the central and southern parts of the state
🔗 Learn more and stay in the loop with current tick research in Illinois at: https://news.illinois.edu/study-identifies-hotspots-of-disease-carrying-ticks-in-illinois/
🔗 Find more information on submitting tick samples through Extension and the Illinois Natural History Survey Medical Entomology Lab at https://go.illinois.edu/bitemap.
Photo Caption: Abrar Hussain, left, Rebecca Smith, and their colleagues mapped the distribution of three tick species across the state of Illinois. They compared this distribution to the incidence of tick-borne diseases in the state. Photo by Fred Zwicky.