Media for the maintenance of yeast strains cultures and to detect spoilage organisms like coliforms, lactobacilli, molds and wild yeasts in the brewery and fermentation industry. There are not many microorganisms causing spoilage of beer and wine. It is limited to a few genera of bacteria, wild yeasts, and moulds. Because the alcohol content, low pH, and other ingredients having inhibitory effects. Some of these contaminants can interfere with fermentation or have deleterious effects on flavour and shelf life.