Detect motile Salmonella species from food and environmental samples with Thermo Scientificâ„¢ Oxoidâ„¢ Modified Semi-Solid Rappaport-Vassiliadis Medium Base (Dehydrated). Motility enrichment on MSRV Medium has been designed as a simple, sensitive method for the isolation of salmonellae. The efficacy of the medium is based upon the ability of salmonellae to migrate through the selective medium ahead of competing Gram-negative, motile organisms and, therefore, produce opaque halos of growth. Utilize motility enrichment on Modified Semi-solid Rappaport Vassiliadis Agar for the isolation of Salmonella species from food and environmental samples associated with the primary stage of animal production (such as dust).A simple and sensitive method for the isolation of salmonellae from food and environmental samples.Gram-positive flora is inhibited by novobiocin, low pH, high magnesium chloride concentration, and malachite green.Isolation is based on the ability of salmonellae to migrate through the selective medium ahead of competing Gram-negative, motile organisms, thus producing opaque halos of growth.Modified Semi-solid Rappaport Vassiliadis (MSRV) Medium is based on the formulation described by De Smedt et al. which has been shown to detect more Salmonella-positive samples than the traditional enrichment procedures1,2. Further collaborative studies have confirmed these findings3,4.Not all products are available for sale in all territories. Please inquire.Remelâ„¢ and Oxoidâ„¢ products are now part of the Thermo Scientific brand.