Salmonella spp. at Slaughter Lacks Ability to Predict Contamination on Farm

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2009-01-01
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Wang, B.
McKean, James
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O'Connor, Annette
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International Conference on the Epidemiology and Control of Biological, Chemical and Physical Hazards in Pigs and Pork
Iowa State University Conferences and Symposia

The SafePork conference series began in 1996 to bring together international researchers, industry, and government agencies to discuss current Salmonella research and identify research needs pertaining to both pig and pork production. In subsequent years topics of research presented at these conferences expanded to include other chemical and biological hazards to pig and pork production.

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The aim of this study was to evaluate the ability of Salmonella contamination in lymph nodes at slaughter to represent the Salmonella shedding on farm. 20 Iowa herds were selected based on cooperation and visited from September 2006 to February 2009. 11 of the 20 herds had multiple visits. At each farm visit, 30 individual fecal samples were collected. At slaughter, 30 mesenteric and 30 sub-iliac lymph nodes were collected. The fecal samples and sub-iliac lymph nodes were able to match on animal level by tattooing pigs on farms. Samples were tested Salmonella spp. by conventional microbiological methods and serotyping. Culture prevalence from farm feces over all the farms was 6%, ranging from 0 to 40% on the farm level and from 0 to 47% on the visit level.

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Thu Jan 01 00:00:00 UTC 2009