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Violet Red Bile (Lactose) Agar (Powder)

Violet Red Bile (Lactose) Agar (Powder)

Cat no: V2123

Supplier: United States Biological
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A standard methods, lactose-containing selective medium for selective detection of Coliform in water, dairy products and other food materials. The medium has been used for the determination of the coli-aerogenes content of water, milk and other dairy products, dairy equipment, and food products etc 1,2. Organisms which rapidly attack lactose produce purple colonies surrounded by purple haloes. Non-lactose or late-lactose fermenters produce pale colonies with greenish zones. Other related Gram-negative bacteria may grow but can be suppressed by incubation at >42 degrees C or by anaerobic incubation. Druce et al.3 found that Violet Red Bile Lactose Agar was as good an indicator of coli-aerogenes bacteria in milk as MacConkey Broth, and that the medium was suitable for determining the coli-aerogenes content of milk. Appearance Dehydrated Medium: Straw-pink colored, free-flowing powder. Prepared medium: Dark purple colored gel Storage conditions and Shelf Life Store the dehydrated medium at 10-30 degrees C. Store the prepared medium at 2-8 degrees C and use as freshly as possible.
Catalogue number: V2123
Size: 500g
References: 1. American Public Health Association (1978) Standard Methods for the Examination of Dairy Products. 14th Edn. APHA Inc. Washington DC. 2. American Public Health Association (1992) Compendium of Methods for the Microbiological Examination of Foods 3rd Edition APHA Inc. Washington DC. 3. Druce R. G., Bebbington N. N., Elson K., Harcombe J. M. and Thomas S. B. (1957) J. Appl. Bact. 20. 1-10. 4. Mossel D. A. A. and Vega C. L. (1973) Hlth Lab. Sci. 11. 303-307.

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