Navigating the diagnostic process
A thorough food allergy workup consists of your medical history, a physical exam, and one or more tests to determine if you are, in fact, allergic to certain foods and to identify the problem foods. Your allergist is likely to perform one or more of the following tests:
· Skin tests: Skin tests consist of applying a tiny amount of the suspected allergen below the upper layer of the skin, usually by scratching or pricking the skin. A skilled allergist tests only the foods he suspects may cause reactions, based on the results of your history and physical exam, so no more than a few pokes with a needle are ever required.
· Blood tests: Your allergist may draw a vial of blood and test it for the presence of antibodies that indicate the probability of an allergy to a specific food. These blood tests are commonly referred to as RASTs (short for radioallergosorbent tests) but more accurately called immunoassay for specific IgE. IgE (or Immunoglobulin E ) is a type of antibody that your immune system produces t Read the rest of this entry »