赖氨酸脱羧酶肉汤 英文名称: Lysine Decarboxylase Broth Tablets | ||||||||||||||||||||||||||||||||||||||||||
型号:null 产品货号: CM0308 | ||||||||||||||||||||||||||||||||||||||||||
价格:请致电:010-57128832,18610462672 | ||||||||||||||||||||||||||||||||||||||||||
品牌: 英国 | ||||||||||||||||||||||||||||||||||||||||||
LYSINE DECARBOXYLASE BROTH (TAYLOR MODIFICATION) Code: CM0308 (Tablets) To detect lysine decarboxylase production by salmonellae and some other Enterobacteriaceae.
* Adjusted as required to meet performance standardsDirections Description Taylor’s modification of the medium1 shows an improved performance over the formulation described by Falkow2. This is achieved by omitting peptone from the medium, thus eliminating false positives caused by Citrobacter freundii and its paracolon types. These organisms utilise peptone as a nitrogen source, produce an alkaline reaction masking the absence of lysine decarboxylase. Taylor’s modification shares the advantages of Falkow’s formulation over that of Moller3 in that it does not require anaerobic culture and low pH and it is relatively easy to control. During the initial stages of incubation, fermentation of glucose by the organism, with acid production results in a colour change to yellow. On further incubation, if lysine is decarboxylated to cadaverine, there will be an alkaline reaction. The colour then changes to purple (positive). If the colour remains yellow, the reaction is negative.
Storage conditions and Shelf life Appearance Quality control
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