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People with food allergies should not only be careful about what they eat

ROCHESTER, Minn. -- Be a cautious kisser, especially if you have a food allergy. A Mayo Clinic physician offers a word of caution on Valentine's Day with a case report in the February issue of Mayo Clinic Proceedings.

David Steensma, M.D., Mayo Clinic hematologist, writes about the case of a 20-year-old woman who is allergic to shellfish and experienced a severe allergic anaphylactic reaction immediately after she kissed her boyfriend. The boyfriend had eaten several shrimp less than an hour earlier.

"It is important to warn susceptible patients that food does not actually have to be eaten to trigger an allergic reaction," says Dr. Steensma. "Touching the offending food and kissing or touching someone who has recently eaten the food can be enough to cause a major reaction," he says.

Kissing has been recognized only recently as a vector for transmitting food allergens, Dr. Steensma writes in the Proceedings article.

In the case of the woman -- she experienced a reaction in her lips and skin, had throat swelling, diffuse flushing, abdominal cramps, nausea and wheezing with symptoms beginning less than one minute after she kissed her boyfriend. She was treated at the emergency department of a Mayo Clinic-affiliated hospital, where she was given a prescription for an epinephrine injection kit, counseled to scrupulously avoid shellfish exposure and instructed to follow up with her primary-care physician.

The couple worked at a seafood restaurant, and the woman sometimes wore gloves while serving food. However, the night of her severe reaction, she reported no distress or symptoms prior to the kiss. The patient had repeatedly touched shellfish while on the job and, as a consequence, had experienced a series of mild allergic reactions. These minor reactions may have served to "prime " her immune system to produce more antibodies directed at crustacean proteins, a phenomenon that is similar to reactions people have to seasonal
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Contact: John Murphy
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
14-Feb-2003


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