A reagent used in most probable number testing for the coliform group of bacteria, which consists of lactose sugar in a nutrient broth. Concerned with lakes. The application of sludge from wastewater ...

Note - broth tubes can be made containing sugars other than glucose (e.g. lactose and mannitol). Because the same pH indicator (phenol red) is also used in these fermentation tubes, the same results ...

In the presumptive test, 9 different tubes of lactose broth with 10 fold variations of the water sample are inoculated. If any lactose-fermenting bacteria grow and produce gas, the medium will turn ...