Methods : methods of examination of diarrheogenic escherichia coli ( gb / t4789 . 6 - 2003 ) and isolation and enumeration of e . sakazakii from dehydrate infant formul recommended by fda of usa were applied 方法：参照gb / t4789 . 6 - 2003致泻性大肠埃希氏菌检验和美国fda 《婴幼儿奶粉中坂崎肠杆菌检测方法》部分。
