A once-rare meat allergy caused by tick bites is dramatically increasing across the United States, researchers said. There’s been a 100-fold increase in positive test results for the allergy, called alpha-gal syndrome, between 2013 and 2024, researchers reported last week at the American College of Gastroenterology’s annual meeting in Phoenix. “Alpha-gal syndrome is unlike any other food allergy we treat,” researcher Dr. Vinay Jahagirdar, a fellow with the Virginia Commonwealth University (VCU) Gastroenterology Fellowship Training Program and Stravitz-Sanyal Institute for Liver Disease and Metabolic Health, said in a news release. “Symptoms often appear several hours after a person eats red meat, making it difficult to connect a meal with an allergic reaction,” Jahagirdar said. Many patients are misdiagnosed or go years without answers.” AGS occurs when a tick bite causes a person’s immune system to develop an allergic reaction to a sugar molecule found in beef, pork or lamb called galactose-alpha-1,3-galactose, or alpha-gal, researchers said. Symptoms from an alpha-gal allergic reaction can include hives, swelling, nausea, vomiting, abdominal pain, diarrhea or even life-threatening anaphylactic shock, researchers said. The syndrome typically is linked to bites from the lone star tick, researchers said. These ticks have expanded their range north and west in recent years, aided by warmer winters and growing deer populations. “Alpha-gal syndrome has gone from a medical curiosity to a major public health issue… read on > read on >

















