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VRBL Agar
Violet Red Bile Agar (VRBL) is a selective medium used for the detection and enumeration of coliform and thermotolerant coliforms food products.
The typical composition corresponds to that defined in the standards NF V08-050, NF V08-060 and NF ISO 4832.
Available as:
Dehydrated medium:
- 500 g bottle
- 5 Kg drum
Also available as ready-to-melt medium:
- 10 vials of 100 ml (BM03408)
- 10 vials of 200 ml (BM03508)
In compliance with regulatory requirements, a USDA permit (VS 16-3) is mandatory for shipments from Canada to the USA due to the inclusion of peptone, an animal byproduct.
Lactose fermentation results in acidification of the medium, shown by the red color of the pH indicator (neutral red) and by the precipitation of bile acids around the colonies.
The simultaneous presence of crystal violet and bile salts inhibit Gram-positive bacteria.
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