What's New

Researchers at Virginia Commonwealth University presented findings at the American College of Gastroenterology's 2025 annual meeting in Phoenix showing a 100-fold increase in positive alpha-gal antibody test results between 2013 and 2024.

One hundred times more cases in eleven years.

According to VCU Health, this is one of the largest real-world analyses of alpha-gal syndrome (AGS) ever conducted. The study's co-author, Dr. Vinay Jahagirdar, called it "unlike any other food allergy we treat."

Massachusetts Just Made It Reportable

Massachusetts recently joined more than a dozen other states mandating that doctors and blood labs report alpha-gal cases, according to WBUR/WUSF.

Mandatory reporting means the data is about to get much more accurate — and almost certainly much higher.

Right now the CDC's official documented case count sits around 110,000 since 2010. But a Stony Brook University report puts the real number at up to 450,000 Americans living with the syndrome — most of them unaware until they wake up at 2 a.m. in anaphylactic shock after a burger.

The Tick Is Expanding. Fast.

The lone star tick — Amblyomma americanum — used to be a southeastern problem. Arkansas, Kentucky, Virginia. That's no longer true.

Brandon Hollingsworth, a researcher at the University of South Carolina who has studied the tick's geographic expansion, told The Guardian: "We've seen an explosive increase in these ticks, which is a concern. I imagine alpha-gal will soon include the entire range of the tick, which could become the entire eastern half of the US."

Laura Harrington, an entomologist and disease specialist at Cornell University, was blunter: "With their adaptive nature and increasing temperatures, I don't see many limits to these ticks over time."

The tick has already been confirmed as far north as New York and Maine.

Why This Is Dangerous — and Misdiagnosed Constantly

Alpha-gal syndrome doesn't work like a normal food allergy. Eat a steak at dinner, feel nothing. Then at 2 a.m., your blood pressure crashes. You wake up dizzy, covered in hives, possibly going into anaphylaxis.

Dr. Tina Merritt, an allergist and immunologist at the Allergy and Asthma Clinic of Northwest Arkansas who helped develop the diagnostic test, explained the delay problem to WUSF: "The hard part with alpha-gal is it's usually delayed. Some people may not associate their reaction with the hamburger they had at dinner."

That delay is why thousands of people get misdiagnosed — sometimes for years — with IBS, anxiety, or unknown gastrointestinal disorders. Dr. Jahagirdar confirmed this directly: "Many patients are misdiagnosed or go years without answers."

In 2024, a pilot became the first known person to die from alpha-gal after eating a hamburger at a barbecue, according to WUSF. The allergic trigger is specific: a sugar molecule called galactose-alpha-1,3-galactose found in mammalian meat — beef, pork, lamb. In some cases, dairy triggers reactions too.

What Mainstream Coverage Is Getting Wrong

The Guardian went straight to climate change as the headline cause. Warmer winters do expand tick habitat, but the framing overlooks a parallel public health failure.

The CDC has known about AGS since at least 2009, when there were only a few dozen documented cases. The agency's own data shows the number potentially hit 450,000. ZERO federal mandate for nationwide uniform reporting exists yet. States are doing it piecemeal.

There's a significant gap between what the government knew was coming and what it actually did to track it.

Most coverage also misses the diagnostic problem. There's no quick test available at most primary care offices. Patients who don't live near a specialist like Dr. Merritt are often left without answers for years. The VCU research specifically flagged this as a systemic failure.

The Practical Reality

If you spend time outdoors east of the Mississippi — hiking, hunting, farming, yard work — this warrants attention. Lone star ticks are aggressive. They don't wait for you to walk through tall grass. They chase you.

Check yourself after every outdoor outing. Wear permethrin-treated clothing. If you develop a strange delayed allergic reaction after eating red meat, ask your doctor to test you for alpha-gal. Many primary care physicians don't routinely screen for the condition.

The 100-fold increase in a decade isn't a rounding error. It reflects a public health trajectory that federal health agencies are still catching up to.