Himedia M1003-500G Recommended by APHA in the performance and confirmation of the presumptive test for coliform bacteria in water, food and milk. This medium was initially listed as an alternative to Lauryl Sulfate Broth in the presumptive Standard Total Coliform Multiple-Tube (MPN) Test for water analysis. Provides excellent results in Eijkman Assays of gas production at 45°C, which is a characteristic of Escherichia coli