DEV Nutrient Agar is recommended for determining total microbial count in water and food.It is a non-selective general purpose media supporting growth of wide number of microorganisms. It has almost double concentration of nitrogen sources that is used in Nutrient agar, making it more nutritious. This medium is in accordance with the German standard methods for testing water and food examination. It is recommended by APHA for bacteriological examination of water and milk.
1.German Standard methods (Deutsche einheitsverfahren) , 1990, The German Drinking water Regulations (Trinkwasser-Verordnung) and the German regulation of food examination (LMBG).2.American Public Health Association.1923.Standard methods of milk analysis. 4th Ed. American Public Health association,Washington, D.C.