3M Food Safety, St. Paul, Minn., launched 3M Petrifilm Salmonella Express System, a new pathogen detection technology that builds upon a solid platform of3M petrifilm salmonella testing pathogen detection solutions.

The new system received Performance Tested Method (PTM) validation (Certification Number 061301) from AOAC Research Institute, and was found to be equivalent to or better than the reference methods for raw ground chicken, pasteurized liquid whole egg, raw ground beef, raw ground pork, cooked chicken nuggets, frozen uncooked shrimp and fresh bunched spinach.

Today, the new system provides a shorter time-to-result, more uniform results and a longer shelf life than the conventional agar methods. It also provides detection and biochemical confirmation of Salmonella in enriched food and food process environmental samples, including dairy, fruits and vegetables, raw meat and seafood, with results available in as little as 44 hours—two times faster than traditional agar methods.

First, the 3M Petrifilm Salmonella Express Plate is a sample-ready, chromogenic culture medium that is specific to Salmonella and provides a presumptive result. Next, the 3M Petrifilm Salmonella Express Confirmation Disk contains a substrate that facilitates the biochemical confirmation of all presumptive positive Salmonella colonies on the platein just four hours. By way of comparison, when food processors outsource sample testing with a third-party contract lab, they’ll commonly wait 24-72 hours for confirmation and pay a nominal amount for each presumptive positive colony requiring confirmation. The 3M Petrifilm Salmonella Express System provides a total solution, offering molecular, immunoassay and indicator testing methods.