CHROMagar™ CCA - 5000 ml

Description

Chromogenic Coliform Agar for the detection and enumeration of ß-glucuronidase positive E. coli and coliforms in water with low bacterial background flora (according to the ISO 9308-1 norm).

The product is composed of a single powder medium.

MEDIUM PERFORMANCE:
1. Simultaneous detection and differentiation: CHROMagarTM CCA allows simultaneous detection and differentiation between E. coli and coliforms in one medium! This is helpful to determine if there is organic contamination (coliforms) or faecal contamination (E. coli). The use of this technique involves less work in comparison with traditional methods (MI Agar).
2. Easy to read: Easy counting of E. coli and coliform bacteria by the color.
3. CONVINIENT: Especially suitable for waters with low bacterial numbers that will cause less than 100 total colonies, like drinking water, disinfected pool water, or finished water from drinking water treatment plants

TYPICAL APPEARANCE OF MICROORGANISMS:
E. coli → Metallic blue to violet
Other coliforms → Pink to red
Other bacteria → Colourless or inhibited

Coliforms, Enterobacteriacae able to ferment lactose (lactose positive Enterobacteriacae), are bacteria present not only in human and warm blooded animals intestinal flora but also in the soil and water. Coliforms are proof of organic, environmental or faecal contamination. Faecal contamination, due to coliforms coming from animal waste, consists mainly of Escherichia coli and thermotolerant Klebsiella.
Strict regulations exist for E. coli/coliform presence in water samples. This can be explained by the importance of these germs in determining drinking water safety and process efficiency of treatment, storage and distribution.