Description
Chromatic Coliform Agar ISO is a chromogenic membrane-filtration medium for enumerating Escherichia coli and other coliform bacteria in water.
The medium differentiates target organisms through enzyme-specific chromogenic reactions: Escherichia coli forms dark blue-to-violet colonies, while other coliforms form pink-to-red colonies.
A measured water volume is filtered through a 0.45 µm membrane, which is placed on the prepared medium and incubated according to ISO 9308-1:2014. Characteristic colonies are counted and confirmed when required.
