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What is the cross-reactivity of food allergies?

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If you have a life-threatening allergic reaction to a certain food, you'll need to avoid similar foods that might trigger this reaction. For example, if you're allergic to shrimp, you may also be allergic to other shellfish like crab, lobster, and crayfish. This is called cross-reactivity.

Another example is oral allergy syndrome. People who are very sensitive to ragweed sometimes find that when they try to eat melons, particularly cantaloupe, they have itching in their mouth. And people who have severe birch pollen allergy also may react to the apple peel.

SOURCES:

The National Institute of Allergy and Infectious Diseases: "Fact Sheet: Food Allergy and Intolerances."  UpToDate. American Academy of Allergy Asthma & Immunology.

Reviewed by Brunilda Nazario on October 29, 2018

SOURCES:

The National Institute of Allergy and Infectious Diseases: "Fact Sheet: Food Allergy and Intolerances."  UpToDate. American Academy of Allergy Asthma & Immunology.

Reviewed by Brunilda Nazario on October 29, 2018

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What does a differential diagnosis mean for food allergies?

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