中文摘要：

人体肠道菌群与肠道黏膜免疫存在复杂的交互作用,从而维持肠道稳态。炎症性肠病（IBD）是一组慢性非特异性肠道炎性疾病,病因和发病机制尚未完全明确。肠道菌群失衡是IBD发生、发展的重要因素,调节肠道菌群可作为IBD的治疗方法之一。本文就肠道菌群失衡在IBD中的作用作一综述。

英文摘要：

Human intestinal microbial flora has complex interaction with intestinal mucosal immune system,which maintains intestinal homeostasis. Inflammatory bowel disease（ IBD） is a chronic and nonspecific intestinal inflammatory disease,the etiology and pathogenic mechanisms have not yet been fully clarified. Dysbiosis of intestinal microbiota is an important factor in the pathogenesis of IBD,and modulation of intestinal microbiota can be one of the measures for treatment of IBD. This article reviewed the dysbiosis of intestinal microbiota in IBD.