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Jul 12, 2026 · Cgkik

A red meat allergy from tick bites is spreading – and the lone star tick isn’t the only alpha-gal carrier to worry about

Hours after savoring that perfectly grilled steak on a beautiful summer evening, your body turns traitor, declaring war on the very meal you just enjoyed. You begin to feel excruciating itchiness, pain or even swelling that can escalate to the point of requiring emergency care.

The culprit isn’t food poisoning – it’s the fallout from a tick bite you may have gotten months earlier and didn’t even notice.

This delayed allergic reaction is called alpha-gal syndrome . While it’s commonly called the “red meat allergy,” that nickname is misleading, because alpha-gal syndrome can cause strong reactions to many products, beyond just red meat.

The syndrome is also rapidly spreading in the U.S. and around the globe. The Centers for Disease Control and Prevention estimates as many as 450,000 people in the U.S. may have it. And it’s carried by many more tick species than most people realize.

A map shows the numbers of confirmed alpha-gal syndrome cases in a band from Oklahoma and Nebraska to Virginia and the Carolinas. There is also a collection in northern Minnesota and Wisconsin, and another in Florida.

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