Assessing the role of feed as a risk factor for Salmonella in pig production

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2013-01-01
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Burns, A.
Lawlor, P.
Gardiner, G.
Tiwari, U.
Duffy, G.
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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 objectives of this study were to investigate Salmonella carriage at each stage of pig production (farrow to finish) on 10 commercial pig farms having a historically high Salmonella seroprevalence and to establish the role of feed as a source of Salmonella on the farms. Pig faecal (n=458) and feed (n=321) samples were taken across all pig production stages and analysed for the presence of Salmonella. The pathogen was detected in pigs on nine farms, in 58/458 (12.7%) faecal samples, with a high prevalence among gilts, weaners and finishers. Only 7/321 (2%) of feed samples were Salmonella-positive, with four farms having at least one Salmonella-positive feed sample. The serovar recovered (4, 12:i:-) was also detected in pigs on the same farms, suggesting that it may have originated in the feed supplied to the farm. On the other hand, the feed may have been contaminated on the farm and in this way played a role in transmission of Salmonella.

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Tue Jan 01 00:00:00 UTC 2013