能够引起肠道内感染,包括胃肠炎、腹泻等症状的大肠埃希菌称为致泻大肠埃希菌(Diarrheagenic Escherichia coli,DEC),它是现今引起全球感染性腹泻流行和地方腹泻暴发的主要病原体,国外研究显示,在腹泻患者中DEC检出率为17.4%~28.0%[1-3],而国内研究中该菌检出率稍低,为12.7%~18.9%[4-5]。根据不同的毒性特征可将DEC分为6类,肠致病性大肠 Escherichia coli, a disease that causes intestinal infections, including gastroenteritis and diarrhea, is called Diarrheagenic Escherichia coli (DEC) and is the main cause of the current global outbreak of infectious diarrhea and local diarrhea. Pathogens, foreign studies have shown that in patients with diarrhea DEC detection rate of 17.4% to 28.0% [1-3], while the domestic study of the detection rate of the bacteria is slightly lower, ranging from 12.7% to 18.9% [4-5]. According to different toxicity characteristics can be divided into six categories of DEC, intestinal pathogenic large intestine