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Percent with food allergy: 5.8%; Children in the United Kingdom: 1 in 6 with eczema; 1 in 5 with allergic rhinitis; 7.1% of breast-fed infants who develop food allergies; Pathophysiology. A child's allergy is an immune system reaction to a foreign substance, or allergen, that is considered harmless to most.
Blood test. For an allergy blood test, a sample of the patient's blood is sent to a laboratory for analysis. Allergy blood tests measure the presence of IgE antibodies to specific foods, pollens, mites, animals, insects and other environmental factors. (IgE, short for "immunoglobulin E", is the antibody that triggers food allergy symptoms.)
Frequency. ~6% (developed world) [1] [2] A food allergy is an abnormal immune response to food. The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure. This typically occurs within minutes to several hours of ...
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