How is dx of food allergies?

➢ Allergy testing can help confirm or rule out allergies, reducing adverse reactions and limiting unnecessary avoidance and medications. ➢ For assessing the presence of allergen-specific IgE antibodies, we can use two different methods: ➢ ELISA test for IgE detect specific IgE antibodies, to determine the substances a subject is allergic to. ➢ This is different from a skin allergy test, which determines allergy by the reaction of a person's skin to different substances. ➢ Non–IgE-mediated and mixed IgE- and non–IgEmediated food allergies present with their symptoms several hours after the ingestion of the food. ➢ Because the symptoms are usually delayed as compared to IgE mediated food allergy it is more difficult to make the association between offending food and the symptoms