Anhydrous nutrient plates for simple microbiological analysis of solutions and dry matter.

CompactDry™ plates are suitable for detection and enumeration of microorganisms from foods and feeds, cosmetics and pharmaceutical samples, as well as for hygiene monitoring and contamination control in food-producing areas. Due to the chromogenic additives, colonies depict specific colouring, making them easy to interpret.

CompactDry™ plates are easy and safe to handle. Due to storage at room temperature, they may be used even on site. One millilitre of the sample to be analysed is applied onto the sterile plate surface, spreading itself evenly over the plate during rehydration of the medium. Dry sample matter is homogenised and solubilised using the CompactDry™ Dilution Rack (Art. No. 4823.1) prior to plate inoculation.

The nutrient medium used for CompactDry™ EC plates is related to the Coliform chromogenic Agar. It consists of a phosphate-buffered, rich medium with peptone and yeast extract as nutrient base, which contains tryptophan for later E. coli detection and has been enriched with NaCl, pyruvate and cholates. It also contains the colour substrates for ß-D-glucuronidase (blue / cyan / violet - E. coli) and ß-D-galactosidase (salmon / magenta / red - other coliforms).Colonies of E. coli show a bright blue colour, while other coliforms grow in red to pink coloured colonies. Addition of red and blue colonies results in total count of coliforms.

AOAC-, MicroVal-, and NordVal- certified.