About: Lauryl tryptose broth

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Lauryl tryptose broth (LTB) is a selective growth medium (broth) for coliforms. Lauryl tryptose broth is used for the most probable number test of coliforms in waters, effluent or sewage. It acts as a confirmation test for lactose fermentation with gas production. Sodium lauryl sulfate inhibits organisms other than coliforms. Formula in grams/litre (g/L) : 20.0,Lactose : 5.0,Sodium chloride : 5.0,Dipotassium phosphate : 2.75,Potassium dihydrogen phosphate : 2.75,Sodium dodecyl sulfate : 0.1pH 6.8 ± 0.2

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  • Lauryl tryptose broth (LTB) is a selective growth medium (broth) for coliforms. Lauryl tryptose broth is used for the most probable number test of coliforms in waters, effluent or sewage. It acts as a confirmation test for lactose fermentation with gas production. Sodium lauryl sulfate inhibits organisms other than coliforms. Formula in grams/litre (g/L) : 20.0,Lactose : 5.0,Sodium chloride : 5.0,Dipotassium phosphate : 2.75,Potassium dihydrogen phosphate : 2.75,Sodium dodecyl sulfate : 0.1pH 6.8 ± 0.2 Samples positive for gas production are transferred to (BLGB) to detect the ability to grow in the presence of bile and produce gas at 95 °F (35 °C) for 48 hours. The absence of gas production in 48 hours is considered a negative test for coliforms. Gas production serves as both a presumptive test and a confirmatory medium. Fecal coliforms are distinguished from coliforms by growth in at 113.9 °F (45.5 °C) for 24 hours. (en)
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  • Lauryl tryptose broth (LTB) is a selective growth medium (broth) for coliforms. Lauryl tryptose broth is used for the most probable number test of coliforms in waters, effluent or sewage. It acts as a confirmation test for lactose fermentation with gas production. Sodium lauryl sulfate inhibits organisms other than coliforms. Formula in grams/litre (g/L) : 20.0,Lactose : 5.0,Sodium chloride : 5.0,Dipotassium phosphate : 2.75,Potassium dihydrogen phosphate : 2.75,Sodium dodecyl sulfate : 0.1pH 6.8 ± 0.2 (en)
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  • Lauryl tryptose broth (en)
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