Thermo Scientific™ Lysine Decarboxylase Broth Tablets (Taylor Modification) (Dehydrated)

Description

• Detect lysine decarboxylase production by salmonellae and other Enterobacteriaceae with Thermo Scientific™ Oxoid™ Lysine Decarboxylase Broth Tablets (Taylor Modification) (Dehydrated)
• Lysine Decarboxylase Broth is a diagnostic medium which distinguishes salmonellae (and some other Enterobacteriaceae) by a distinct biochemical reaction
• Taylor's modification of the medium 1 shows an improved performance over the formulation described by Falkow
• 2 This is achieved by omitting peptone from the medium, thus eliminating false positives caused by Citrobacter freundii and its paracolon types
• Lysine Decarboxylase Broth is especially suited to study the decarboxylase reactions for members of Enterobacteriaceae
• Taylor’s modification makes the medium relatively easy to control without the requirement of anaerobic culture and low pH
• During the initial stages of incubation, fermentation of glucose by the organism, with acid production results in a color change to yellow
• On further incubation, if lysine is decarboxylated to cadaverine, there will be an alkaline reaction
• The color then changes to purple (positive)
• If the color remains yellow, the reaction is negative
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