A general purpose nutrient medium for testing of water, sewage, faeces & other materials. NUTRIENT AGAR (pH 6.8) is used as a general purpose medium for testing of water, sewage, faeces & other materials. It is a basic culture medium used for maintenance or to check purity of subcultures prior to biochemical or serological tests. This medium is recommended for presumptive isolation of Salmonella and Yersinia colonies. Nutrient Agar, pH 6.8 has relatively simple formulation which provides the necessary nutrients for the growth of many microorganisms which are not very fastidious. Many bacteria have the optimum pH growth range of 6.6 to 7.0.
The peptone and beef extract provide sufficient nutrients for the growth of non-fastidious bacteria. Both are the sources of nitrogen, vitamins, carbon and amino acids whilst agar is the solidifying agent.