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food challenge |
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food challenge, a challenge test for determining food allergens. A small amount of a lyophilized preparation of the suspected allergen is administered orally, and the patient is monitored for reactions such as rash, rhinorrhea, or diarrhea. Also called food challenge test. food challenge, n a process of testing for food allergies in which the patient is given, often in double-blind conditions, a sample of a different, potentially allergenic, food once a day and reactions are noted. In some forms the challenge is preceded by a diet from which all common allergens have been eliminated for several weeks, after which foods are introduced as above. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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If not, this is where things get tough, and you'll wish your Local Food Challenge was based in Kansas. Food allergy diagnosis requires the determination of a causal relationship between the improvement of symptoms after commencing a strict avoidance diet for a suspected food protein followed by the return of these symptoms on food challenge (1). The initial screening is done using an in vitro measurement of allergen-specific IgE, possibly followed by skin testing of extracts of the modified plant in individuals known to be sensitive to the source material, and finally, by the rare possibility of employing blinded food challenge procedures in sensitive individuals. |
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