"A RAST (Radioallergosorbent test) is a way of measuring the amount of IgE antibody in the blood stream made against a specific allergen. RAST tests and allergy skin tests give similar information. Both identify IgE antibody (allergy antibody) against materials you might be allergic to...Skin tests may pick up some allergies that would be missed by RAST tests but skin tests have a small risk of precipitating an allergic reaction. "
Information retrieved from:
http://www.oregonallergy.com/id17.html
http://www.nlm.nih.gov/MEDLINEPLUS/ency/imagepages/19334.htm
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