Envirocheck Contact Yeasts and Moulds, a semi-quantitative detection of microorganisms on surfaces and in liquids, are flexible paddles that are coated with Tryptic soy agar to determine the yeasts and moulds from samples. Slide A is coated with CASO (Tryptic Soy) Agar containing 0.05% Triphenyl Tetrazolium chloride (TTC). The growth of bacteria is indicated by red colonies due to the formation of red formazan dye when TTC is reduced and Slide B is coated with Rose Bengal Chloramphenicol Agar. Chloramphenicol inhibits the growth of bacteria additionally to Rose Bengal. Rose Bengal reduces the size and height of mould colonies so that slow-growing fungi are not overgrown by more rapidly growing species.
Application: This medium is recommended for the selective isolation and enumeration of yeasts and moulds from environmental materials and foodstuffs. Envirocheck contact slides can be used for both surface and liquid testing in industrial and environmental monitoring.
Legal Information: ENVIROCHECK is a trademark of Merck KGaA, Darmstadt, Germany