For determination of microbial counts in milk and other dairy products by pour plate method. It is recommended by BIS committee under specification IS: 5402:1969 PLATE COUNT AGAR (SPECIAL) is used for estimation of microbial counts in raw milk and other dairy products. Casein enzymic hydrolysate provides amino acids and other complex nitrogenous substances. Yeast extract supplies Vitamin B complex. Generally pour plate method is followed. The samples are diluted and appropriate dilutions are placed in petri plates. Sterile molten agar is added to these plates and plates are rotated gently to ensure uniform mixing of the sample with agar.