Primary Tryptone Bile X – Glucuronide (TBX) Agar

///Primary Tryptone Bile X – Glucuronide (TBX) Agar

Primary Tryptone Bile X – Glucuronide (TBX) Agar

SKU: PP1134 Category:

Tryptone Bile X (TBX) – Glucuronide Agar
Recent developments in culture media have given rise to the use of chromogenic substrates as a means of differentiating bacteria particularly among the coliform group of organisms. This is one such medium and has been developed as a selective medium for the isolation and enumeration of Escherichia coli in food samples. Based on Tryptone Bile Agar it incorporates the chromogenic agent X-glucuronide, which detects glucuronidase activity, the same enzyme as is detected by MUG reagent. Escherichia coli can be differentiated from other coliform organisms by the presence of glucuronidase resulting in the colonies being blue/green while the other coliforms are colourless. For information on the full technical detail as to the functionality of this medium reference should be made to the many publications available.

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Organisms Ref. No Result
Escherichia coli NCTC 12241 Blue colonies
Escherichia coli NCTC 13216 Blue colonies
Citrobacter freundii NCTC 13639 Cream colonies
Enterococcus faecalis NCTC 12697 Inhibited