Survival and Transmission of Salmonella enterica Serovar Typhimurium in an Outdoor Organic Pig Farming Environment. Annette Nygaard Jensen,1* Anders ...
Survival and Transmission of Salmonella enterica Serovar Typhimurium in an Outdoor Organic Pig Farming Environment Annette Nygaard Jensen,1* Anders Dalsgaard,2 Anders Stockmarr,1 Eva Møller Nielsen,3 and Dorte Lau Baggesen1 Danish Institute for Food and Veterinary Research, Bu ¨lowsvej 27, DK-1790 Copenhagen V,1 The Royal Veterinary and Agricultural University, Bu ¨lowsvej 17, DK-1870 Frederiksberg C,2 and Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen S,3 Denmark Received 12 October 2005/Accepted 26 December 2005
It was investigated how organic rearing conditions influence the Salmonella enterica infection dynamics in pigs and whether Salmonella persists in the paddock environment. Pigs inoculated with S. enterica serovar Typhimurium were grouped with Salmonella-negative tracer pigs. Bacteriological and serological testing indicated that organic pigs were susceptible to Salmonella infections, as 26 of 46 (56%) tracer pigs turned culture positive. An intermittent and mainly low-level excretion of Salmonella (
