(BLOOMINGTON) Health experts are warning that several tick species are expanding their range across Illinois, raising the risk of tick-borne illnesses throughout the state of Illinois.
According to the Illinois Department of Public Health, lone star ticks, blacklegged ticks, and dog ticks have been found in numerous counties, with some areas reporting the presence of all three. Researchers say warmer winters and longer warm seasons are helping ticks stay active for more of the year.
Blacklegged ticks, which can transmit Lyme disease, are spreading southward from northern Illinois, while lone star ticks, linked to Alpha-gal syndrome, a potentially serious red meat allergy, are moving north from the southern part of the state. Illinois is now among the leading states for reported Alpha-gal cases.
Experts say the increasing variety of tick species and the diseases they carry is a growing public health concern. In some counties, about 40% of blacklegged ticks test positive for Lyme disease.
An invasive species known as the Asian longhorned tick is also raising concern, as it can infest livestock heavily, leading to reduced milk production and, in severe cases, death from blood loss.
Health officials are urging residents, particularly farmers and outdoor workers, to take precautions. Recommended steps include using EPA-approved insect repellents, wearing permethrin-treated clothing, checking for ticks after spending time outdoors, and showering soon after potential exposure.
Officials emphasize that early detection is crucial, since Lyme disease symptoms can resemble common illnesses and may be difficult to recognize. Researchers and public health agencies are also working to improve testing and treatment options to better address tick-borne diseases.