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This is a reason why so few reference ranges are provided on this site. 7th Edition., Lippincott Williams & Wilkins, Philadelphia. It is important to know that you must use the range supplied by the laboratory that performed your test to evaluate whether your results are "within normal limits." For more information, please read the article Reference Ranges and What They Mean. You may be able to find your test results on your laboratory's website or patient portal. You may have been directed here by your lab's website in order to provide you with background information about the test(s) you had performed.
National Institute of Allergy and Infectious Disease (1998 February). This test measures the amount of allergen-specific Ig E in the blood in order to detect an allergy to a particular substance. Ig E is an antibody that functions as part of the body's immune system, its defense against "intruders." When someone with a predisposition to allergies is exposed to a potential allergen such as food, grass, or animal dander for the first time, that person becomes sensitized. Immunoglobulin E (Ig E) is a class of antibody (immune protein) associated with allergic reactions. It is normally found in very small amounts in the blood.