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在人的肠道中栖息着大约1×1014个约100多种细菌,构成了所谓肠内菌群,其中肠杆菌、肠球菌等需氧菌仅占菌群的1‰,绝大多数为厌氧菌,健康情况下它们与宿主之间处于生理的、和谐的、相互依赖、相互制约的状态,维持人体肠道的微生态平衡,对保证人体健康有着重要意义[1]。若这种平衡破坏,出现菌群失调,将会引起许多相关疾病。
About 1 × 1014 of about 100 kinds of bacteria inhabits the human intestine, forming the so-called intestinal flora. Enterobacteriaceae, enterococci and other aerobic bacteria account for only 1 ‰ of the flora, the vast majority of them are anaerobic Bacteria, their health and the host in a physiological, harmonious, interdependent and mutually restrictive state to maintain the human intestinal microflora balance, to ensure the health of people is of great significance [1]. If this balance is destroyed, there will be a number of related diseases caused by the imbalance of flora.