Food allergy and the related diseases of digestive system

Food allergy refers to the body's abnormal immune response to food, which induces disorder and/or injuries of human body, and thus triggers a series of manifestations.Ninety percent of food allergy is due to the following allergen: milk, eggs, peanuts, nuts, seafood, soy, wheat, etc.The symptoms of digestive system are closely associated with the nature of allergen (including protein's family nature, three dimensional structure, biological activity and stability) and the body's own status (genetic factors, integrity of intestinal mucosal barrier and oral immune tolerance). The symptoms of digestive systems are not typical, and differ by various factors like body conditions, ages, regions and allergens, so the diagnosis is difficult.Food allergy is categorized by its mechanism: IgE, non IgE, and mix.The symptoms of digestive systems include vomiting, diarrhea, reflux, constipation and abdominal pain, etc, and relative diseases include food protein-induced enteropathy, food protein-induced enterocolitis syndrome, food protein-induced enterocolitis syndrome, food protein-induced proctocolitis, celiac disease, eosinophilic gastroenteritis, eosinophilic esophagitis and infantile colic, etc.Delayed diagnosis will result in failure to thrive, anemia and hypoproteinemia.Therefore, early diagnosis and treatment can effectively prevent malnutrition and improve the children's animation. Key words: Food allergy; Digestive systems; Child