OGY-NPS are used for detection of yeasts and molds in food and other samples. The formulation is acc. to D A Mossel et. Al, Journal of applied bacteriology. Oxford, 33(3), 454- 457 (1970). Yeast extract and dextrose provide nitrogen and carbon components. The addition of oxytetracycline inhibits the growth of bacteria. The medium is manufactured and quality tested in compliance with ISO 11133:2014 standard.