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胃肠道对食物中化学物质和微生物病原体的入侵是一重要屏障。肠道中sIgA能与细菌或病毒结合,减少微生物的粘附和生长,肠粘膜中淋巴细胞还具有细胞介导的免疫功能。
The gastrointestinal tract is an important barrier to the invasion of chemical and microbial pathogens in food. Intestinal sIgA can be combined with bacteria or viruses to reduce the adhesion and growth of microorganisms, lymphocytes in the intestinal mucosa also has a cell-mediated immune function.