SUMMARY:In outbreaks of food poisoning from meat, caused bySalmonellaorganisms, intravital infection and post‐mortem contamination of the meat must be distinguished. Man and different species of animals suffering fromSalmonellainfection may be a source of infection or contamination. In the Netherlands this is especially the case with carriers ofSalm. dublinin adult cattle. In the National Salmonella Centre, 41Salmonellatypes were isolated from man and animals in the years 1946–1952. In 1949–1952, eighteen outbreaks of food poisoning due to meat products and only one due to fresh meat were examined. In 4 cases an intravital infection of the meat was established; in the remaining cases the source of contamination remained unknown. The causative types were:Salm. dublin, Salm. typhi‐murium, Salm. paratyphiB,Salm. oregon, Salm. newportandSalm. bovis‐mo