Trends in Salmonella shedding by U.S. market hogs, swine 2000.

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2003-01-01
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Bush, Eric
Fedorka-Cray, Paula
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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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USDA’s National Animal Health Monitoring System’s (NAHMS) conducted a study of the health and management of swine as part of the Swine ‘95 study and Swine 2000 study. The studies were conducted in the top swine states in the U.S. A subset of participating farms allowed collection of fecal samples (50 samples per farm) from pens containing late finishers. The same methodology and laboratory was used in both studies so comparison of results provides a measure of change in on-farm Salmonella status between 1995 and 2000. Samples were tested for Salmonella and questionnaires were used to obtain management data regarding feed management, environmental conditions, vaccination policies, and other factors. The percent of farms with at least one positive sample was 38% in 1995 and 34% in 2000. The percent of samples positive was 6% in 1995 and 2000. The percent of pens positive was 17% in 1995 and 16% in 2000. In contrast to trends in slaughter HACCP Salmonella samples, the similarity in on-farm Salmonella status suggests that on-farm Salmonella intervention has yet to be initiated on a wide scale by producers and that on-farm Salmonella status is not directly related to slaughter Salmonella status.

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Wed Jan 01 00:00:00 UTC 2003