DC Medium with BCIG

DC Medium with BCIG is used in the chromogenic differentiation of E. coli from other coliforms in water samples using the membrane filtration method in a laboratory setting. DC Medium with BCIG is not intended for use in the diagnosis of disease or other conditions in humans.

DC (Differential Coliform) Medium with BCIG is a selective and differential medium for the presumptive identification of E. coli. This medium is enhanced by the addition of a chromogenic agent, BCIG, 5-bromo-4-chloro-3-indolyl-ß-D-glucuronide to detect glucuronidase activity. The presence of the enzyme ß-D-glucuronidase differentiates most E. coli spp. from other coliforms, and is the same enzyme used in the MUG reaction. BCIG reacts slightly differently, and when released into the medium is insoluble, accumulating within the cell, imparting a blue to purple color to presumptive E. coli colonies.