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肠道杆菌是一大群寄生于人和动物肠道中的革兰氏阴性杆菌,其中有的与机体共生,构成正常菌群,如大肠杆菌;有的经消化道侵入后,能引起疾病,如伤寒杆菌、痢疾杆菌等。各菌从形态上不易鉴别,主要靠生化反应和血清学试验加以鉴别。肠道杆菌主要包括有埃希氏菌属的大肠杆菌;沙门菌属的伤寒杆菌,副伤寒杆菌及肠炎杆菌,属于志贺菌属的痢疾杆菌及其他肠道杆菌如变形杆菌、肺炎
Enterobacteriaceae is a large group of Gram-negative bacilli parasites in human and animal intestines, some of which symbiotic with the body to form a normal flora, such as E. coli; some after the invasion of the digestive tract, can cause diseases such as typhoid fever Bacillus, Shigella and other bacteria. The bacteria are not easy to identify morphologically, mainly by biochemical reactions and serological tests to be identified. Enterobacteriaceae mainly include Escherichia coli Escherichia; Salmonella typhimurium, Paratyphoid bacilli and Enteritis bacteria, belonging Shigella Shigella and other enteric bacteria such as Proteus, pneumonia