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    Kids Don't Always Outgrow Sting Allergies

    Protective Shots Lower Risk, Research Shows
    By
    WebMD Health News

    Aug. 11, 2004 -- For most people, bee stings are merely painful reminders that summer has its downsides, but for those who are allergic, stings can be deadly. It has long been thought that kids usually outgrow allergic reactions to insect stings, but new research shows that this is often not the case.

    In one of the largest and longest follow-up studies of children with insect sting allergies, Johns Hopkins researchers reported that dangerous allergic reactions to stings continued well into adulthood in a significant percentage of people. This was much less likely, however, when children were given allergy shots.

    Just 5% of children with a history of severe allergic reactions to stings who received the allergy shots, known as venom immunotherapy, experienced moderate to severe allergic reactions to stings as adults. In contrast, 32% of the study participants experienced serious allergic reactions to stings later in life if they had not been given the allergy shots.

    "The good news is that 62% of the children did appear to outgrow allergies to insect stings, but the bad news is that the rest did not," lead researcher David Golden, MD, tells WebMD. "The ultimate goal of our research is to come up with tests to tell the two groups apart."

    The Buzz on Bee Stings

    There are roughly 40 fatal allergic reactions to bee, wasp, and other insect stings in the U.S. each year. Studies suggest that 1% of children and 3% of adults have life-threatening allergic reactions to stings that go beyond the expected swelling and pain. These reactions could range from slight difficulty breathing and dizziness to shock.

    Approved by the FDA in 1979, venom immunotherapy involves injections of purified bee or other insect venom given in small doses to build up tolerance to the sting over time. Treatments typically last three to five years.

    While the therapy is generally recommended for children with a history of moderate to severe reactions to insect stings, it is widely underused even though it is highly effective, Golden says.

    In an effort to determine the persistence of insect sting allergies and the protection conveyed by the treatment, Golden and colleagues collected follow-up data on more than 500 children six to 32 years after they were treated for allergic reactions to insect stings. The findings are published in the Aug. 12 issue of TheNew England Journal of Medicine.

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