5 articles · Updated · The Philadelphia Inquirer · May 17
Pennsylvania health officials began asking testing labs in February to voluntarily report alpha-gal syndrome after identifying about 600 cases over the past two years, roughly 300 positives annually since 2024.
The state says early tracking is meant to establish a baseline and catch any worsening trend in a tick-borne allergy that can trigger life-threatening reactions to beef, pork, lamb, dairy and gelatin.
Lone star ticks are the main U.S. source, but researchers say black-legged ticks common in Pennsylvania may also cause the syndrome, raising concern in a state that regularly leads the nation in reported Lyme disease cases.
New Jersey, which has tracked alpha-gal since 2022, logged just under 500 cases in 2025; a New Jersey man who died after eating a hamburger in 2024 was the first documented fatality tied to the allergy.
The CDC estimates nearly 450,000 Americans may have alpha-gal syndrome as expanding tick ranges—helped by climate change, forest regrowth and growing deer populations—broaden exposure.
As a deadly meat allergy spreads, why is Pennsylvania's tracking plan voluntary while its neighbors mandate reporting?
With ticks expanding due to climate change, are current prevention methods enough to stop this life-threatening allergy?
This tick-borne allergy lurks in medicines and vaccines. How can patients be protected during medical procedures?
Pennsylvania’s Response to Alpha-Gal Syndrome: Understanding the Red Meat Allergy Linked to Tick Bites
Overview
Alpha-Gal Syndrome (AGS) is gaining national attention, especially after a tragic death in New Jersey highlighted its seriousness. In Pennsylvania, this has led to renewed efforts to understand and address AGS. The syndrome begins when a tick carrying the alpha-gal molecule bites a person, transferring the molecule and triggering an immune response. This makes the person sensitive to alpha-gal, so later, when they eat red meat or use products containing alpha-gal, they can have allergic reactions. The report emphasizes the need for public awareness, better diagnosis, and proactive public health measures to manage this growing concern.