Shellfish Allergy

In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan.


Shellfish reactions can occur as a result of immune system-mediated effects and also through non-immunological processes. It is important to determine the underlying cause for the patient’s presentation to best direct therapy and understand management implications. Tropomyosin is the most common shellfish allergen found. There is a wide array of consumables that falls under the category of shellfish, including crustaceans (such as crab or shrimp) or mollusks (such as clams or scallops), and this adds to the difficulty in dealing with “shellfish” allergies. Not all individuals react to both. One group notes only 14% cross-reactivity between crustacean and mollusk allergies.

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  • Study Guide