RS ISO 16649-2: 2001 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