Used as an enrichment medium for the detection and cultivation of coliform bacteria, particularly in water, food, and dairy samples. It contains lactose and peptone to support the growth of non-fastidious organisms, with lactose fermentation producing acid and gas as key indicators of coliform presence, such as E. coli. This medium is non-selective but differential, allowing the presumptive identification of lactose-fermenting gram-negative bacteria. Commonly used in microbiological testing to assess fecal contamination and ensure sanitary quality control in water, food, and dairy products.