What is new in food allergy diagnostics? A practice-based approach

The literature is replete with reviews listing diagnostic methods for food allergy and their utility. However, for the practicing allergist/immunologist, the diagnosis, or the dediagnosis, of food allergy starts with the patient presentation. Unlike other disorders, for which a patient presents, a history is obtained, and tests are performed to elucidate the disorder, in food allergy, the sequence of events is often reversed. The ubiquitous availability and indiscriminate ordering of food specific serum IgEs, the prior recommendations of late introductions of allergenic foods in the diet of infants, and the avoidance of allergenic foods in the diets of siblings and families of persons with food allergy may have contributed to this situation.

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