Neogen® Petrifilm® Salmonella Express (SALX) System is used for the rapid qualitative detection and biochemical confirmation of Salmonella species in enriched food and food process environmental samples. The Petrifilm SALX System consists of the Salmonella Enrichment Base, the Salmonella Enrichment Supplement, the Petrifilm® Salmonella Express (SALX) Plate, and the Petrifilm® Salmonella Express (SALX) Confirmation Disk, which are all packaged separately. The Petrifilm SALX Plate is a sample ready-to-use chromogenic culture medium system that contains a cold-water soluble gelling agent and is selective and differential for Salmonella, providing a presumptive result. The Petrifilm SALX Confirmation Disk contains a biochemical substrate that facilitates the biochemical confirmation of Salmonella organisms. The Petrifilm SALX Plate is used with or without the Petrifilm SALX Confirmation Disk. The Petrifilm SALX Confirmation Disk may be used only in conjunction with the Neogen® Petrifilm SAMeer tonenMinder tonen