Which of the following actions might be taken by an allergist to determine which food allergen is creating a reaction in a patient? Select all that apply.

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The first objective is to get a complete history of the reaction including the onset and duration, symptoms, seasonality, suspected foods, how the food was prepared, and any other information the patient can provide. The history is followed by a complete physical examination. A food diary noting all of the foods eaten and whether an allergic reaction occurred is helpful, as is a scratch skin test. The gold standard for food allergy diagnosis is the double-blind food challenge, but in severe cases where this might be life-threatening, blood work to measure antibodies is conducted.

Which of the Following Actions Might Be Taken by an Allergist