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Contact VRBL + Neutralizers
Violet Red Bile Lactose agar is a selective media used for the detection and enumeration of coliforms and thermotolerant coliforms in food products. This medium is supplemented with neutralizers allowing its use to control critical points in industry (e.g.: protected areas, microbiological monitoring programs of surfaces and industrial environments).
Available as ready-to-use medium : VRBL – 20 plates of Ø 65mm.
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.
The media forms a convex meniscus that allows the direct application of the agar to the control areas, whether on walls, floors, utensils, or staff. The media contains several neutralizers that inhibit disinfectant residues that may be present on the surfaces to be monitored, in order to assess the contamination levels before and after disinfection of the food chain environment.
Neutralizers are selected to inactivate residues of disinfectants that may be present on surfaces, such as aldehydes and phenols, quaternary ammoniums, oxidizing compounds.
Lactose fermentation results in acidification, revealed by the red colour 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 ensures the inhibition of Gram-positive bacteria.
