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Beyond the bite: Tick-born meat allergies

This undated photo provided by the U.S. Centers for Disease Control and Prevention shows a female Lone Star tick, which despite its Texas-sounding name, is found mainly in the Southeast. At least 100,000 people in the U.S. have become allergic to red meat since 2010 because of a weird syndrome triggered by tick bites. That's according to a new government report. But health officials believe more have the problem and dont know it, and the actual number is more than than four times higher. The Centers for Disease Control and Prevention on Thursday, July 27, 2023 released two reports on the growing tick-borne allergy problem. (James Gathany/CDC via AP) (James Gathany)

ORLANDO, Fla. – Each year 30 thousand people are officially diagnosed with Lyme disease. But the CDC reports that in fact, almost a half a million people may get sick from ticks each year in the United States. Lyme disease is just one of dozens of diseases ticks carry—including one that could make you allergic to meat.

Some tick-borne diseases include Babesiosis, Colorado tick fever, Heartland virus, Lyme disease, Rocky Mountain spotted fever, Tick-borne relapsing fever and now doctors believe they can even cause food allergies.

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Dr. Robert Valet, an allergist and immunologist at the Vanderbilt University School of Medicine, explains how “patients become sensitized by the tick bite and then later when they eat red meat can have an allergic reaction.”

Alpha-gal syndrome is a reaction to sugar found in red meat and dairy. It’s caused by the bite of a lone star tick, and Valet says that its impact is spreading across the country -- “The most prevalent areas appear to be Virginia, North Carolina, and Tennessee. But this tick is distributed really through much of the eastern seaboard and really out into the Midwest.”

The CDC reports Alpha-gal syndrome is now the tenth most common food allergy in the U.S. It affects up to 450 thousand people by making them allergic to beef, pork, lamb, and dairy products. There’s no cure, and the effect of a simple tick bite can last a lifetime. Protecting yourself is crucial. Wear long pants and long sleeve shirts when you’re outside in wooded areas. Also, check yourself for ticks when you come back inside.

Now unfortunately, getting a diagnosis for Alpha-gal syndrome can be difficult as many doctors are not aware of it. A study published by the CDC surveyed 15 hundred doctors and nurses and 42 percent had never heard of it.


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