人体正常消化道功能与肠道内微生物保持生态平衡有密切关系。正常情况下,人体肠道内有两类微生物:一类是对人体有益的微生物,如嗜乳酸杆菌等;另一类是对人体有害的微生物,如大肠杆菌,金黄色葡萄球菌等。这两类微生物共存于肠道内,彼此互相制约,保持相对平衡,防止肠道疾病 Normal human digestive tract function and intestinal micro-organisms to maintain ecological balance are closely related. Under normal circumstances, there are two types of microorganisms in the human intestine: one is beneficial to humans, such as lactobacilli; the other is harmful to humans, such as E. coli, Staphylococcus aureus. These two types of micro-organisms co-exist in the intestine, mutual restraint each other to maintain a relative balance to prevent intestinal diseases