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What Causes Shrimp Allergies?

Shrimp allergies are a genetic immune disorder. Patients who have a family history of food or environmental allergies are more susceptible to a shrimp allergy. Recent studies show, however, that repeat exposure to shrimp can also trigger an allergy in predisposed individuals.

  1. Food Allergies

    • Food allergies are caused by an over-reaction of the immune system. When a food-allergic patient is exposed to the allergen, the immune system incorrectly assumes the patient is in danger. Histamines rush into action to fight the "enemy," and instead of attacking the allergen, they attack the body.

    Shellfish Allergies

    • Seafood allergies are grouped into several categories: Mollusca, Anthropod and Chordate. Shrimp is included in the Anthropod category, and is accompanied by crabs, lobster, and other shellfish. Patients who are allergic to shrimp may be allergic to other members of the Anthropod family; speak with a doctor to determine if these foods should be avoided. Patients will not outgrow a shellfish allergy.

    Symptoms

    • Symptoms include hives, redness, swelling of the lips, difficulty breathing, a drop in blood pressure, vomiting and diarrhea. Administer antihistimines and epinephrine immediately, and notify emergency personnel.

    Genetic Causes

    • Food allergies are caused by a genetic trait that affects the immune system. Thus, patients with food allergies tend to have a family history of allergy. It is important to note that this history does not necessarily include a food allergy. The genetic trait can be passed on by parents with environmental allergies or an allergy to a different food.

    Environmental Causes

    • Shrimp allergies may potentially be caused by repeat exposure. In cultures that consume a large amount of seafood, shellfish allergy is more common. In addition, some recent studies have shown that repeat handling of shellfish, such as in a work environment, may lead to a higher incidence of allergy.

    Research

    • There is no cure for an allergy to shrimp. However, researchers are continuing to study possible treatments for this condition.

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