食品和动物饲料微生物学-β-葡萄糖醛酸酶阳性大肠杆菌计数的水平方法第2部分:44℃下使用5-溴-4-氯-3-吲哚基β-D-葡萄糖醛酸的菌落计数技术Microbiology of food and animal feeding stuffs - Horizontal method for the enumeration of beta-glucuronidase-positive Escherichia coli - Part 2: Colony-count technique at 44 degrees C using 5-bromo-4-chloro-3-indolyl beta-D-glucuronide