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Allergy Basics
, Allergy to Drugs
, Food Allergies
, Living with Allergies
by ruth on May 10, 2007

So if it's not due to iodine, what's the offending substance in shellfish that brings about allergic reactions?
Shellfish allergies are most likely the result of tropomyosin, an allergen in shrimp and lobster. Tropomyosins are a protein found in invertebrates, such as shellfish, and vertebrates, such as fish, and are needed for muscle contraction in these creatures. Tropomyosins are present in other foods as well, such as beef, pork, and chicken, but rarely cause reactions in these foods. In theory, any food that contains a protein could result in an allergic reaction. The possibility of a correlation between an allergy to shellfish and an iodine allergy is highly unlikely.
The third page of the case report clarifies the differences between food allergies, food hypersensitivity, food intolerance, and oral allergy syndrome. It also discusses the difference between IgE-mediated or non-IgE-mediated hypersensitivity reactions (I've read about this hundreds of times, but my eyes still glaze over when I read this immunology stuff, arrgh!).
Do you have shellfish or seafood allergies? I don't, but my 4-year old multiple food-allergic son does. :(
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Mr Wong
Vote for Using Amiodarone in Patients with Shellfish Allergies:
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