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Molluscan shellfish allergy.

Steve L Taylor1

  • 1Department of Food Science and Technology, Food Allergy Research and Resource Program, University of Nebraska, Lincoln, NE 68583-0919, USA.

Advances in Food and Nutrition Research
|February 23, 2008
PubMed
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Molluscan shellfish allergies are common and often caused by tropomyosin. Individuals allergic to one type of shellfish may react to others, necessitating avoidance of all molluscan shellfish.

Area of Science:

  • Immunology
  • Allergology
  • Food Science

Background:

  • Food allergies impact 3.5-4.0% globally, with seafood allergies being prevalent.
  • Immediate-type food allergies involve IgE antibodies targeting specific food proteins.
  • Symptoms range from mild skin reactions to severe anaphylaxis.

Purpose of the Study:

  • To identify the primary allergen in molluscan shellfish.
  • To investigate cross-reactivity among different molluscan shellfish species.
  • To inform clinical recommendations for managing molluscan shellfish allergies.

Main Methods:

  • Review of existing literature on molluscan shellfish allergies.
  • Identification of allergenic proteins through molecular characterization.
  • Analysis of patient sera for IgE cross-reactivity.

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Main Results:

  • Tropomyosin identified as the major allergen in molluscan shellfish (oyster, abalone, squid).
  • Cross-reactivity observed between tropomyosin from different molluscan shellfish species.
  • Potential cross-reactivity with crustacean shellfish tropomyosin noted.

Conclusions:

  • Individuals with molluscan shellfish allergies should avoid all types due to cross-reactivity.
  • Tropomyosin is a key allergen responsible for cross-reactivity in molluscan shellfish allergies.
  • Further research needed on cross-reactivity with crustacean shellfish.