12/11/2012
...the doctor, who removes the patches and assesses skin irritation (redness and swelling), which may indicate an allergy to the substance applied at that site. Advantages: Patch testing can be especially useful in diagnosing delayed allergic reactions, non-IgE-mediated food allergies, eosinophilic esophagitis, food allergy-related gastrointestinal symptoms, and food allergy-related atopic dermatitis. With these types of food allergies, offending foods are often difficult to pinpoint and are often not detected by other types of allergy testing....