Allergy testing and food intolerances

An allergy is an abnormal reaction of the immune system to a normally harmless substance, the allergen: pollens, dust mites, animal dander, moulds, foods, insect venoms, latex or medicines. Identifying the allergen involved is the essential step towards appropriate avoidance and treatment. The laboratory measures total IgE and specific IgE directed against each allergen in the blood, individually or in panels (respiratory, food, paediatric). These tests complement the skin tests performed by the allergist and are particularly useful in children, during antihistamine treatment or with reactive skin. The laboratory also offers a food intolerance profile based on the measurement of specific IgG against a wide range of foods. Distinct from allergy, intolerance shows up in a delayed way through digestive problems, migraines, fatigue or skin problems; the result, issued quickly, serves as the basis for dietary support, in liaison with the clinic's nutrition centre.