Ticks that trigger red meat allergy spreading in the U.S.

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Ticks that trigger red meat allergy spreading in the U.S.
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Hours after eating red meat, people with the allergy can experience hives, redness, itching, swelling and intense gastrointestinal distress.

, it’s believed the lone star tick picks up alpha-gal after biting a deer, then transfers it into a person’s bloodstream when it bites a human. When a person is sensitized to alpha-gal, it triggers an allergic reaction. A blood test can confirm the allergy.to the buildup of plaque in heart arteries, boosting the risk of heart attacks and stroke for people who have the allergy.

Platts-Mills has the allergy himself: he was bitten in August 2007 and experienced his first reaction that November hours after eating lamb chops. The delayed response can make it a challenge for doctors and patients to connect the foods with symptoms, the“One of the fascinating things, the hallmark of this, is that the symptoms occur in a delayed fashion, three to six hours after someone typically eats red meat,” Commins said.The symptoms can include hives, redness, itching and swelling.

The allergy involves red meat like beef, pork or lamb; and, in some cases, dairy — especially heavy-fat dairy like ice cream. Doctors aren't sure whether it only takes one lone star tick bite or several for people to develop the sensitivity, but anyone, including children, can develop it, Commins said.“If it swims or flies, it’s fine,” Commins said.

“If you’re my age, you’ve got a cardiologist who’s been telling you the treatment already, and that is avoid red meat completely, and don’t eat full-fat milk and cheese,” said Platts-Mills, who is in his 70s. The allergy usually goes away after two to three years as long as the patient has no additional tick bites. Doctors are working on a vaccine, but that’s likely several years away.

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