Chromogenic Media Applications

Streamlined workflows, optimized at every stage

Thermo Scientific Precis Detection Methods are the next generation in culture media-based testing with a simplified workflow compared to other culture media methods.

Superior performing culture media mean a simpler workflow, easier to read plates and fewer presumptive-positive colonies to confirm. With results in as little as 42 hours with typical Salmonella and Listeria colonies confirmed in a few minutes, Precis Methods increase efficiency whilst decreasing handling requirements.

Rapid, validated pathogen detection

Precis Detection Methods provide faster workflows for key foodborne pathogens: Salmonella species, Cronobacter species, Listeria species and Listeria monocytogenes.

All follow the principal of a single overnight enrichment, a single chromogenic agar plate and a single, simple confirmation step. Compared to traditional culture-based methods, Precis Methods are simpler to run and generate results within a two-day timeframe, enabling quicker actions and shorter product hold times.


1 day	1 day	From 10 minutes*
Overnight sample enrichment in a single, optimized broth	Overnight plate incubation after inoculation with 10 µL loop	Confirmation using a simple rapid test or single agar plate

*Presumptive-positive colonies of Salmonella species, Listeria species and L. monocytogenes can be confirmed in around 15-20 minutes. Presumptive-positive Cronobacter species are confirmed in around 24 hours.

Simplified, robust enumeration - Thermo Scientific Precis and Brilliance Enumeration Methods

The Thermo Scientific Listeria Precis Enumeration Method and Thermo Scientific Brilliance CampyCount (Campylobacter jejuni and C. coli) and Brilliance Staph 24 (Staphylococcus (coagulase-positive staphylococci)) chromogenic agar enumeration methods are equally simple. They replace standard methods, that require multiple dilution and plating steps, with a single dilution and single plating step, followed by simple confirmation.


1-2 days	20 minutes
Dilution and surface or pour inoculation of plate	Counting and confirmation of typical colonies

Featured application: Visible selective enrichment of Salmonella and Cronobacter species

In your busy Salmonella and Cronobacter testing workflows, there is no time for error. A common mistake, particularly in high throughout labs, is the accidental omission or duplication of adding a selective supplement during sample preparation. For clearer selective enrichment of food and environmental samples, the new Thermo Scientific Oxoid PrecisBlue Supplement has been specifically designed to reduce workflow errors. The addition of an inert blue dye provides a clear visual reference, enabling easy identification of supplemented samples.

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Featured application: Salmonella detection

Streamlined Salmonella testing drives efficiencies, enables flexibility, and solves problems. Extended validation of the Thermo Scientific Salmonella Precis Method simplifies workflows and encompasses challenging food matrices. This quick and easy culture-based method for detection of Salmonella species has been validated for the broadest range of food, animal feed, and environmental samples, and is ready to slot into standard laboratory workflows.

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