Improved detection of spoilage yeasts and moulds in beer
New Thermo Scientific Yeast and Mould Agar (CM920) has now been specifically formulated for use in the brewing industry for the detection of both saccharomyces and non-saccharomyces wild yeasts (which could cause product spoilage) in the presence of culture yeasts.
The growth and detection of wild yeasts in beer and pitching yeast is complicated by the presence of culture yeast. Taylor and Marsh described the use of MYGP + Copper Medium for the selective isolation of wild yeasts 1 - the addition of copper having an inhibitory effect on culture ale and lager yeasts and thus allowing growth of any wild yeasts present. However the authors recognised that variations in the raw materials of the formulation, such as peptones, malt, yeast extract and agar, could markedly affect the performance of the medium by neutralising the inhibitory action of the copper.
Source : Thermo Scientific. View Company Information
Posted on August 5, 2002