Variation ID | Product Code | Pack Size | List Price | Qty | ||
---|---|---|---|---|---|---|
photo_camera | KM0161-500G | 500g
KM0161-500G |
£99.75 |
This medium was originally described by Slanetz and Bartley(1) for the enumeration of enterococci from water samples using membrane filtration.The medium has also become useful as a direct plating medium.
Tryptose and yeast extract provide the required carbon, nitrogen and vitamins. Glucose is a fermentable carbohydrate. The di-potassium hydrogen phosphate acts as a buffer.
Selectivity is achieved through the addition of sodium azide which is used to suppress the growth of Gram-negative organisms. The medium contains tetrazolium chloride, which is reduced by enterococci to the insoluble red dye formazan resulting in dark red colonies of enterococci on the agar.
It should be noted that this reaction is not exclusive to enterococci and colonies should be confirmed by additional testing e.g. aesculin hydrolysis.
Direct plating medium.
Enumeration of enterococci from water samples using membrane filtration.
Additional Information:
Shelf Life (days):1095 days
Storage Temp (C): 10-30C
Dehydrated Medium Appearance: Fine Powder
Prepared Medium Appearance: Firm Gel
Dehydrated Medium Colour: Beige
Prepared Medium Colour: Rose
Dehydrated PH: 7.2 ± 0.2
Prepared PH: 7.2 ± 0.2
Recommended Incubation: Incubation should be in accordance with the specific investigation and associated methodology being performed
Formula* g/L
Tryptose: 20.0
Yeast extract: 5.0
Glucose: 2.0
Di-potassium hydrogen phosphate: 4.0
Sodium azide: 0.4
Tetrazolium chloride: 0.1
Agar: 12.0
Total: 43.5
*Adjusted/supplemented as required to meet performance requirements