英语语法分析

Enterotoxigenic E. coli or ETEC is a leading cause of bacterial diarrhea.

肠毒性大肠杆菌即etec是细菌性腹泻的首要致病因素。

Objective to construct the display vector based on the CS3 pili of enterotoxigenic Escherichia coli.

目的构建大肠杆菌CS3菌毛呈现载体，实现外源表位在细菌表面的呈现。

Are Helicobacter species and enterotoxigenic Bacteroides fragilis involved in inflammatory bowel disease?

炎症性肠病是否与螺旋杆菌及肠产毒性脆弱拟杆菌感染有关?。