Beer-NPS

Beer-NPS are used for the detection of Beer-spoilling microorganisms e.g. Lactobacillus, Pediococcus and Zymomonas. The formulation is according to Konzulis and Page (1968). The formulation of the Beer-NPS provides a complex N-source from peptone and yeast extract to the microorganisms. Dextrose and Lactose are used as C-source. Beer and tomato juice enhances the growth of the target organisms. The low pH-value inhibits the development of bacteria except those of acid formers. The growth of yeasts and molds is inhibited by Actidione (Cycloheximide). Bromocresolgreen shows microbial activities by a color change from green to yellow. The medium is manufactured and quality tested in compliance with ISO 11133:2014 standard.