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SKU
CDL/1182
Brand
CONDALAB
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LISTERIA FRASER BROTH BASE (ISO 11290-1) 500 grams/bottle

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Listeria Fraser Broth Base is used for the rapid detection of Listeria from food and environmental samples. The antibiotics are already included in the formula so it is only necessary to add the Ferric Ammonium Citrate Supplement (Cat. 6050). Listeria spp. may be present in small numbers and are often accompanied by considerably larger numbers of other microorganisms, therefore selective enrichment is necessary. Listeria Fraser broth is used in this selective enrichment of Listeria monocytogenes and other Listeria species in all food types, including milk and dairy products, and environmental samples. This formula is described according to the ISO 11290. Enzymatic digest of casein, enzymatic digest of animal tissues and meat extract provide nitrogen, vitamins, minerals and amino acids essential for growth. Yeast extract is the source of vitamins, particularly of the B-group. Potassium phosphates act as a buffer system. All Listeria species hydrolyze esculin, which reacts with ferric ions producing a blackening of the medium. The addition of ferric ammonium citrate improves the growth of Listeria monocytogenes. Lithium chloride inhibits the growth of enterococci that can hydrolyze the esculin.
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Brand CONDALAB
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