The Oxoid Brilliance E.coli/coliform selective agar now allows the indole reaction to be performed directly on the culture plate, giving rapid confirmation of presumptive-positive E.coli colonies.
Oxoid Brilliance E.coli/coliform selective agar is a chromogenic medium for the detection and enumeration of E.coli and other coliforms (important hygiene indicators) from food and water samples.
Chromogenic agents within the medium are used to detect the ss-glucuronidase activity of E.coli and the ss-galactosidase activity of coliforms (including E.coli), allowing them to be clearly differentiated on the culture plate (coliforms - pink; E.coli - purple).
The optimisation of Oxoid Brilliance E.coli/coliform selective agar now allows purple, presumptive-positive E.coli colonies to be confirmed directly on the plate.
When the plate is flooded with Kovacs solution (Oxoid product code R21522, Bactidrop Indole Kovacs), E.coli colonies turn a distinctive cherry-red colour, allowing rapid enumeration of confirmed E.coli colonies.
