大肠杆菌是寄居肠道的优势菌丛之一，大多数对人体无害，但人们很早就发现大肠杆菌如远离肠道，侵入其他组织和血液，就可引起化脓性炎症或败血症。相比而言，其肠道致病性的认识较晚，直到四十年代发现某些血清型大肠杆菌是爆发婴儿腹泻的病因后，各方面的研究才取得了较... Escherichia coli is one of the dominant colonies in the intestine, most of which are harmless to the human body. However, Escherichia coli has been found long ago to cause purulent inflammation or sepsis if it is far away from intestines and invades other tissues and blood. In contrast, its intestinal pathogenic awareness late, until the late forties found that some of the serotypes of E. coli is the etiology of infant diarrhea, all aspects of the study was made more ...