Lysine Decarboxylase Broth Tablets (Taylor Modification) (Dehydrated)

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 medium¹ shows an improved performance over the formulation described by Falkow.²This 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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