紫红胆盐琼脂+MUG 英文名称: VIOLET RED BILE AGAR (VRBA) with MUG | ||||||||||||||||||||||||||||||
型号:null 产品货号: CM0978 | ||||||||||||||||||||||||||||||
价格:请致电:010-57128832,18610462672 | ||||||||||||||||||||||||||||||
品牌: 英国 | ||||||||||||||||||||||||||||||
VIOLET RED BILE AGAR (VRBA) with MUG CODE: CM0978 A lactose-containing selective medium for the detection and enumeration of coliform organisms in water, food and dairy products.
* Adjusted as required to meet performance standardsDirections The medium is based on Violet Red Bile Lactose Agar (VRBLA) (CM0107) which is a selective medium for the detection and enumeration of coliform organisms. 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. 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°C or by anaerobic incubation. Druce et al. found that Violet Red Bile Lactose Agar was as good an indicator of coli-aerogenes bacteria in milk as MacConkey Broth, and that the Oxoid medium was suitable for determining the coli-aerogenes content of milk. VRBA with MUG contains 4-methylumbellifery-ß-D-glucuronide (MUG) as a substrate which is cleaved by the enzyme ß-glucuronidase produced by Escherichia coli resulting in a flourescent end-product. For further information about MUG see MUG Reagent (BR0071). Storage conditions and Shelf Life Appearance Quality control
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