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Violet Red Bile Glucose Agar Violet Red Bile Glucose Agar is a selective medium for the isolation and enumeration of enterobacteriacae in food products. It is a modification of the original Violet Red Bile Agar (PP1150) with the Lactose being replaced with Glucose. As all members of the enterobacteriacae ferment Glucose it allows for a wider range of organisms to be detected. The medium is made selective by the inclusion of Bile Salts and Crystal Violet to inhibit gram-positive and other non-enteric organisms. -
Originally introduced as an aid to recovery of Shigella spp. XLD is also a first class medium for recovery of Salmonella spp. It differs from other media of this type in that it has less Sodium Desoxycholate as its selective agent. The indicator system is somewhat complex taking advantage of the fermentation or otherwise of three carbohydrates (Lactose Sucrose and Xylose) together with Lysine Decarboxylase and Sodium Thiosulphate as an indication of the presence or absence of Hydrogen Sulphide. -
A nutrient agar corresponding to the standard formulation described in ISO 6222:1999. -
This is a selective medium for the isolation and enumeration of yeasts and moulds in dairy products. The medium has a low pH to inhibit bacterial growth and is made more selective by the inclusion of chloramphenicol. It complies with the requirements of ISO 6611 for the enumeration of yeasts and moulds . -
This is a selective medium for the isolation and enumeration of Yersinia spp. in clinical and food samples. It is made selective by the inclusion of Sodium desoxycholate, Crystal violet and the antimicrobials Cefsulodin, Novobiocin and Irgasan. Mannitol is also included which Yersinia ferments giving a colony that produces a ‘Bull’s Eye’ appearance. The majority of other enteric organisms are inhibited but if they do grow they produce a large pinkish colony with an opaque halo.
