How risky are ticks in Pennsylvania? Survey hopes to find out Patrick Varine Wed., May 8, 2019 2:58 p.m. | Wednesday, May 8, 2019 2:58 p.m. Lyle Buss/University of Florida The American dog tick is another vector for disease in Pennsylvania. Tribune-Review file Black-legged ticks are the top vectors for Lyme disease in Pennsylvania, according to the state health department Maine Medical Center Research Institute The groundhog tick. Maine Medical Center Research Institute The American dog tick. Maine Medical Center Research Institute The Lone Star tick. Daily Gallery India’s tribal women see little hope in election A curated collection of photojournalism from around the region, nation and world.