A procedure for the enumeration of Salmonella spp. is described in CEN(European Committee for Standardisation )-ISO(International Standardisation Organisation )/TS 6579-2:2012 ‘Microbiology of food and animal feed - Horizontal method for the detection, enumeration and serotyping of Salmonella - Part 2: Enumeration by a miniaturized most probable number technique’. 
The procedure describes a miniaturized MPN method in 12-wells microtiter plates with Modified semi-solid Rappaport Vassiliadis (MSRV) agar as selective enrichment medium.