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Guide to different tick species and the diseases they carry

Alpha-gal syndrome and the Lone Star tick

Bites from the Lone Star tick can sometimes lead to alpha-gal syndrome, which is associated with a meat allergy. As the tick feeds, it transfers a sugar molecule called alpha-gal into the body. In some people, this molecule triggers a reaction from the body's immune system. It causes an allergic reaction to certain meats, such as beef, pork or lamb, but not poultry or fish. It also may cause reactions to other foods, such as dairy products or gelatins, that come from mammals.