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Allergen

  • Definition
    • An allergen is a substance that can cause an allergic reaction. In some people, the immune system recognizes allergens as foreign or dangerous. As a result, the immune system reacts by making a type of antibody called IgE to defend against the allergen. This reaction leads to allergy symptoms.

  • Information
    • Common allergens include:

      • Animal proteins and animal dander
      • Dust
      • Drugs (such as antibiotics or medicines you put on your skin)
      • Foods (such as egg, peanut, milk, nuts, soy, fish, animal meat, and wheat)
      • Fungal spores
      • Insect and mite feces
      • Insect bites and stings (their venom)
      • Natural rubber latex
      • Pollen
  • References
    • Stewart GA, Richardson JP, Zhang J, Robinson C. The structure and function of allergens. In: Adkinson NF Jr., Bochner BS, Burks AW, et al., eds. In: Middleton's Allergy Principles and Practice. 8th ed. Philadelphia, PA: Elsevier Mosby; 2014:chap 26.