Foodborne taxi-infections caused by Salmonella are widespread in industrialized countries. Nothing less than 15,000 cases of human salmonellosis are detected each year in Belgium without taking into account patients treated without any diagnostic. According to the Belgian veterinary inspection services, 26.3 %of pig carcasses are contaminated with Salmonella out of 11,1.1 06 slaughtered each year. However, Salmonella presence in pig intestinal tract doesn't entail necessarily carcass presence and human infection depends on the ingested germ number. The objectives of this project begun in February 1999 are to obtain and especially maintain a Salmonella-free pig production system (4). Besides, implementation and standardization of surveillance methods, microbiological screening and typing should allow immediate reaction.