Deoxycholate Lactose Agar was formulated by Leifson for the detection of coliforms in water, dairy products and other food materials. USBio recommends Violet Red Bile Agar as the medium of choice for isolating coliforms from food products. Growth of coliforms which ferment lactose produce red ...
Dextrose agar is used for the culture of microorganisms with or without added blood. Supplementation with 5% blood provides additional growth factors for fastidious microorganisms. When pH is lowered to 3.5 medium can be used to obtain total counts of yeasts in food.
Dextrose Broth is a basic medium used to study the fermentation of dextrose by microorganisms. It contains casein peptone used as carbon and nitrogen source and salt for electrolyte balance. Dextrose is the only fermentable carbohydrate. The medium does not contain a pH indicator.
