Description

C.C. CHROMOGENIC MEDIUM is a chromogenic and selective medium for determination and differentiation of E. coli and total choliform in water and foods samples. Formula is in accord with methods APAT CNR IRSA (Met. 7030E). The medium is made selective by the presence of bile salts, the differentiation of the coliforms and E.coli is possible thanks to the presence of two chromogenic substrates; a substrate for the determination of the beta-galactosidase (salmon-GAL) and beta-glucuronidase (X-gluc).

The detector of the beta-galactosidase is hydrolyzed from all coliforms by the issuance of a salmon metabolite; while the beta-glucuronidase is hydrolyzed only by E.coli and a few strains of salmonella and shigella with the release of a blue metabolite.

E. coli grows with blue colonies tending to purple, while the other coliforms grow with salmon color; othe enterobacteria with colorless colonies. On the colonies of E.coli can be performed direct the indole test (Kovac's reagent).

Packing:

• Cod. B70.360 Pack. 5 Kg
• Cod. 70.360 Pack. 500 g
• Cod. 71.360 Pack. 100 g
• Cod. 60.55V Pack. 20 plates 60 mm
• Cod. 14.0175V Pack. 20 plates 90 mm
• Cod. 11.0050 Pack. 20 contact plates 
• Cod. 20.095 Pack. 6 bottles da 100 ml
• Cod. 50.45 Pack. 40 test Kit