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  2. Allergen - Wikipedia

    en.wikipedia.org/wiki/Allergen

    An allergen is an otherwise harmless substance that triggers an allergic reaction in sensitive individuals by stimulating an immune response.. In technical terms, an allergen is an antigen that is capable of stimulating a type-I hypersensitivity reaction in atopic individuals through immunoglobulin E (IgE) responses. [1]

  3. Allergy - Wikipedia

    en.wikipedia.org/wiki/Allergy

    Dust mite allergy, also known as house dust allergy, is a sensitization and allergic reaction to the droppings of house dust mites. The allergy is common [38] [39] and can trigger allergic reactions such as asthma, eczema, or itching.

  4. List of allergens - Wikipedia

    en.wikipedia.org/wiki/List_of_allergens

    Shellfish allergies are highly cross reactive, but its prevalence is much higher than that of fish allergy. Shellfish allergy is the leading cause of food allergy in U.S adults. [31] As of 2018 six allergens have been identified to prawn alone; along with crab, it is the major culprit of seafood anaphylaxis. [13]

  5. Allergic response - Wikipedia

    en.wikipedia.org/wiki/Allergic_response

    Allergies are an abnormal immune reaction. The human immune system is designed to protect the body from potential harm and in people who have allergies the immune system will react to allergens (substances that trigger an immune response). The immune system will produce immunoglobulin E, IgE, antibodies for each allergen.

  6. Type I hypersensitivity - Wikipedia

    en.wikipedia.org/wiki/Type_I_hypersensitivity

    Type I hypersensitivity (or immediate hypersensitivity), in the Gell and Coombs classification of allergic reactions, is an allergic reaction provoked by re-exposure to a specific type of antigen referred to as an allergen. [1] Type I is distinct from type II, type III and type IV hypersensitivities. The relevance of the Gell and Coombs ...

  7. Food allergy - Wikipedia

    en.wikipedia.org/wiki/Food_allergy

    A food allergy is an abnormal immune response to food.The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure.