Escherichia coli or fecal streptococci contamination will be indicated by the presence of fecal coliforms. 大肠埃希氏菌或链球菌会通过粪便大肠菌的存在而显示出来。
The shape of the bacterium Escherichia coli might have evolved to cope with life in tight spaces, researchers suggest. 研究人员推测，大肠埃希氏菌的菌体外型也许和密闭空间生命竞争有关。
美
