Lyme disease cases in Allegheny and Westmoreland counties are nearing historic highs, underscoring how severely Western Pennsylvania continues to be affected by the tick-borne illness. Preliminary data show more than 1,300 cases have already been reported across the two counties this year.
The latest totals keep the region among the most heavily impacted areas in the country for Lyme disease. The figures point to a persistent public health challenge in a part of Pennsylvania where tick exposure remains a major concern during warmer months and beyond.
Lyme disease is spread through the bite of infected ticks, and rising case counts can reflect both widespread tick activity and increased detection of infections. In Western Pennsylvania, the concentration of cases in Allegheny and Westmoreland highlights how local communities continue to face elevated risk.
With numbers approaching record territory, the trend adds to concerns about ongoing Lyme disease spread in Pennsylvania. The early data suggest the region is again on track to rank among the state's hardest-hit areas for the illness.
