Recent developments in culture media have given rise to the use of chromogenic substrates as a means of differentiating bacteria particularly among the coliform group of organisms. This is one such medium and has been developed with the aim of simplifying the differentiation and presumptive identification of the main organisms usually found in Urinary Tract Infections. Based on the traditional CLED Medium, to prevent the swarming of Proteus spp, two chromogens are present in the medium. One allows the detection of enterococci giving rise to blue colonies whilst the second results in purple colonies of E. coli. Phenylalanine and Tryptophan are also included as indicators of Tryptophan deaminase activity producing brown colonies of Proteus spp. This media is an opaque version to aid differentiation and presumptive identification of the bacteria isolated.
|Shelf Life (days)|
|Storage Temp (°C)|
|Enterococcus faecalis||NCTC 12697||Turquoise blue colonies|
|Escherichia coli||NCTC 12241||Purple colonies|
|Proteus mirabilis||NCTC 10975||Clear colonies with brown halo|
|Enterobacter aerogenes||NCTC 10006||Metallic blue colonies|
|Staphylococcus aureus||NCTC 12981||White colonies|
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