Harlequin® E. coli / Coliform Agar

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• Item No. NCM1002S – 36.6 g
• Item No. NCM1002A – 500 g
• Item No. NCM1002B – 5 kg
• Item No. NCM1002C – 10 kg
• Item No. NCM1002D – 25 g

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E. coli / Coliform Agar is for the simultaneous enumeration of Escherichia coli and coliforms in food and environmental samples and is not intended for use in the diagnosis of disease or other conditions in humans.

This dual chromogenic substrate medium makes the different colony types easy to distinguish allowing rapid counting of both E. coli and coliforms on a single agar.

Based upon the formulation of Tryptone Bile Agar, the medium has been modified by the addition of two chromogenic substrates, one to detect the ß-glucuronidase enzyme (X- glucuronide) and another to detect the ß-galactosidase enzyme (magenta-ß-gal). Typical E. coli strains possess both enzymes but only cleave the X-glucuronide substrate, thereby producing blue-green colonies. Typical coliforms, however, possess only the ß-galactosidase enzyme and produce rose-pink colonies.

The colony types are easily distinguishable, even in the presence of other organisms, or when large numbers are observed, making simultaneous enumeration of E. coli and coliforms a quick and simple procedure.

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Specifications
Brand	Neogen® Culture Media
Analyte	E. coli, Coliforms, Enterobacteriaceae
Platform	Dehydrated Culture Media
Mass	25 kg
Formula	Formula Liter Tryptone 20.0 g/L Bile Salt No.3 1.5 g/L X-glucuronide 0.075 g/L Magenta-β-Galactoside 0.1 g/L Agar 15.0 g/L
Grams per Liter	36.60
Liters per 500 g	14.00
Plates per 500 g	750.00
Preparation	Suspend 36.6 grams of the medium in one liter of purified water. Heat with frequent agitation and boil for one minute to completely dissolve the medium. Autoclave for 15 minutes at 121°C. Cool to 45-50°C.
Previous Item Number	Product was previously known as LabM Product: HAL008 Harlequin® E.coli/Coliform Medium
Package Dimensions	14.70 in x 14.70 in x 28.70 in
Package Weight	61.70 lb

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• TECHNICAL SPECIFICATION SHEET

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