大肠埃希氏菌(通称大肠杆菌)主要寄居于人和动物的肠道内,一般情况下对人无致病性。引起人类疾病的大肠杆菌有两种情况:即肠道外感染和肠道内感染。肠道外感染是指大肠杆菌侵入人体正常无此菌寄居的部位并引起疾病,如肾盂炎、膀胱炎、尿路感染等。至于肠道内感染则是由于大肠杆菌在肠道内致病引起腹泻,在临床上容易同其他疾病相混淆如痢疾霍乱等;在实验室检查中往往易被忽视,把从粪便中检出的大肠菌统统按非致病菌对待。因此而影响临床诊断与流行病调查,这是值得注意 Escherichia coli (commonly known as E. coli) mainly lives in the intestine of humans and animals, under normal circumstances, non-pathogenic to humans. There are two cases of E. coli that cause human disease: extra-intestinal infections and intestinal infections. Parenteral infection means that Escherichia coli invades the human body normally without this bacteria inhabiting the site and cause disease, such as pyelitis, cystitis, urinary tract infection. As for the intestinal tract infection is due to pathogenic E. coli in the intestine caused diarrhea, clinically easily confused with other diseases such as dysentery cholera, etc .; in laboratory tests are often overlooked, the coliform detected from the stool All non-pathogenic bacteria treated. It is worth noting, therefore, that it affects the investigation of clinical diagnosis and epidemiology