DEP study: Lyme disease risk in all 67 Pennsylvania counties


HARRISBURG, Pa. — For the first time, blacklegged (deer) ticks have now been observed in all 67 Pennsylvania counties, according to researchers at The Department of Environmental Protection.

The range expansion took place in just decades, as similar studies conducted in the mid-1960s found no specimens. The study was authored by the DEP Vector Management team and Indiana University of Pennsylvania Professor of Biology Dr. Tom Simmons.

The research found Ixodes scapularis, the blacklegged tick, and Borrelia burgdorferi, the causative agent of Lyme disease, present in all 67 counties. The research also found that in recent years the blacklegged tick has spread in western Pennsylvania, though the prevalence rate of Lyme disease still remains relatively lower than the rest of the state.

The blacklegged tick is the primary carrier of Lyme disease, an infectious disease caused by the bite of an infected tick that can cause fever, fatigue, headache, muscle aches and joint pain.

Concerns statewide

“Every Pennsylvanian, from Philadelphia to Erie, must take precautions to prevent the spread of Lyme disease,” said acting DEP Secretary John Quigley. “The first line of defense against Lyme disease and any other tick-borne illnesses is avoiding tick infested areas.”

The DEP suggests people wear protective clothing, use insect repellent (i.e. DEET), and do a full body check after spending time outdoors. The study also confirmed the presence of two other human pathogen diseases, Babesiosis and Anaplasmosis, in Pennsylvania blacklegged ticks. The prevalence rates of these two diseases were much lower than Lyme disease.

Big problem in Pa.

Pennsylvania has reported the most cases of Lyme disease in the nation for the past five years. All Pennsylvanians are encouraged to take precautions to prevent the spread of tick-borne illnesses.


Parents should check their children for ticks. Showering within two hours of outdoor exposure may also help prevent transmission. If an individual has been bitten by a tick, we recommend that they remove the tick carefully with a set of fine tipped tweezers. If an individual develops signs and symptoms of Lyme disease after a tick bite, seek medical attention. Early diagnosis and treatment of Lyme disease may prevent late-stage complications.

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  1. I’ve heard about a new ultraviolet machine called the UVLRx that’s being used for Lyme patients. It uses a fiber optic thread which is inserted directly into the vein and the treatment lasts for an hour, so all the blood is treated. Has anyone tried this?


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