Can a tick bite make you vegetarian?
Beef cattle may have found a new best friend in the tiny arachnid.
Fri, Nov 09 2012 at 11:51 AM
Would you like a side of anaphylaxis with your burger? How about nausea, stomach cramps, indigestion, vomiting, diarrhea, congestion, sneezing, headaches or asthma?
Such is the possibility if you have been nibbled upon by a lone star tick because a single bite can cause “alpha-gal allergic reaction,” according to a study published earlier this year and recently presented at the Annual Scientific Meeting of the American College of Allergy, Asthma and Immunology (ACAAI).
And no, that’s not an allergy to strong women or some tween girl superhero; alpha-gal is a sugar carbohydrate found in red meats such as beef, pork and lamb.
Following a tick bite, antibodies to alpha-gal in the tick’s saliva are produced in the person’s blood. Since alpha-gal is also found in meat, once bitten, a person’s immune system can trigger the release of histamine in response to the presence of the substance, causing an allergic reaction ranging from mild to severe.
"Blood levels of antibodies for alpha-gal in the human body can rise after a single bite from the lone star tick," said allergist Stanley Fineman, M.D., ACAAI president. "This can result in allergic symptoms which are usually delayed after meat ingestion and may present as mild hives but may also be a severe, potentially deadly reaction known as anaphylaxis."
According to the study, positive alpha-gal rates are 32 percent higher in the central and southern regions of the United States, which is lone star tick territory. But researchers also found surprisingly high positive rates in the north-central and west regions of the country, places where the lone star tick doesn’t reside.
"These findings suggest that other species of ticks, or possibly human factors, may play a role in allergic reactions to alpha-gal," said Fineman. "Patients with delayed allergic reactions after eating meats should see an allergist to determine if it is an alpha-gal allergy. The best treatment is strict avoidance of meat.”
Potential prognosis? Veggie burger sales rise, meat-lovers lament, and the cows rejoice.
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