Microbiological tests for cleaning and hygiene control detect general residues of foods on insufficient cleaned surfaces in the production environment. These residues of nutrients are the basis for growth of microorganisms.
Colony counting in foods or on surfaces can be done using the ready-to-use Compact Dry plates which are available for 13 different parameters of analysis. General method base of examinations with Compact Dry plates is the cultivation of microorganisms on standard nutrient media. The test principle is based on specific chromogenic substrates which are converted into colored products by the metabolism of microorganisms. Beside examination of diluted food samples, they are also suited for swab samples from surfaces or incubation of membrane filter samples from liquids.
Compact Dry is a ready-to-use test method which helps to reduce the time needed to perform microbial testing. Therefore, it allows maximum productivity by increasing efficiency. The plates can be used to test raw materials as well as finished products like food, beverages and cosmetics. In combination with a wet swab sampling system such as Promedia ST-25 (Art. No. Z0302, available from R-Biopharm), Compact Dry plates can also be used for surface monitoring especially for areas which are difficult to reach.
Compact Dry is an easy-to-read results test method. Place 1ml of sample (liquid food or homogenized/diluted solid food) onto the plate and wait until the liquid spread over the whole plate by itself. Incubate the plates at the temperature specified in the package inserts. The grown colonies are pigmented with different colors, developed by chromogenic substrates and redox indicators. The type of bacteria is identified by its color. For further investigation single colonies can be easily selected and picked from the plate surface.
Compact Dry is also an easy-to-store test method. The plates can be kept at room temperature for up to 24 months. Therefore samples can be applied to the plates directly on-side. The firmly closing lid allows the safe transport of the Compact Dry plates. The plates can be used over an incubation temperature range of 20 – 42 °C. The rigid structure of the plates enables easy, slip-proof stacking in the incubator and prevents leakage of sampling material. This saves space and keeps the incubator neatly.
Additionally membrane filters can be tested using Compact Dry plates. Pipette 1ml of sterile water (or physiological sodium chloride solution; for example RIDA® NaCl, Art. No. Z0301) into the middle of the Compact Dry plate. Filter 100 ml water or any other liquid using an ordinary sterile membrane filter (e.g. Ø 47 mm, 0.45 μm pore size) for microbiological analysis. Place the filter on the moisturized nutrient pad with trap side up. Colonies will grow on the filter.
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Usage of Compact Dry AQ is a simple and safe test procedure for determination and quantification of heterotrophic water bacteria from water samples (drinking and ultrapure water). The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry CF is a simple and safe test procedure for determination and quantification of coliform bacteria in foods, cosmetics or raw materials – as well as pharmaceutical raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry EC is a simple and safe test procedure for determination and quantification of coliform bacteria and E. coli in foods, cosmetics, water or raw materials – as well as pharmaceutical raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry ETB is a simple and safe test procedure for determination and quantification of Enterobacteria in foods, cosmetics or raw materials – as well as pharmaceutical raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry ETC is a simple and safe test procedure for determination and quantification of Enterococcus in foods and water samples. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry LM is a simple and safe test procedure for detection of Listeria monocytogenes in pre-enriched samples of foods. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry LS is a simple and safe test procedure for quantification of Listeria contaminations in foods or raw materials – as well as pharmaceutical raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Compact Dry PA is a simple and safe test procedure for the determination and quantification of Pseudomonas aeruginosa counts in foods, cosmetics, water samples or pharmaceutical materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry SL is a simple and safe test procedure for detection of Salmonella in pre-enriched samples of foods or raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry VP is a simple and safe test procedure for detection and quantification of Vibrio parahaemolyticus as well as Vibrio spp. in foods or raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry BC is a simple and safe test procedure for determination and quantification of Bacillus cereus in foods or raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry X-SA is a simple and safe test procedure for determination and quantification of Staphylococcus aureus in foods, cosmetics or raw materials – as well as pharmaceutical raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry YM is a simple and safe test procedure for determination and quantification of yeasts and molds in foods or raw materials – as well as pharmaceutical raw materials. The ready-to-use plates consist of a special 50 mm diameter petri dish containing a detection specific nutrient pad.
Usage of Compact Dry YMR (rapid) is a simple, safe and fast test procedure for determination and quantification of yeasts and molds in foods or raw materials – as well as pharmaceutical raw materials
Sampling device consisting of sterile swab in 10 ml sterile PBS buffer for quantitative detection of microorganisms in environmental samples in combination with Compact Dry medium systems.