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United States Department of Agriculture

Agricultural Research Service

Title: Elimination of Salmonella Species in Swine by Isolated Weaning - the First Critical Control Point

Authors
item Cray, Paula
item Harris, Delbert - IOWA STATE UNIV., AMES

Submitted to: Swine Research Report
Publication Type: Proceedings
Publication Acceptance Date: December 1, 1996
Publication Date: N/A

Technical Abstract: Salmonella spp. are ubiquitous in nature and are frequently recovered from pigs. Procurement of pigs free of Salmonella spp. is not always possible. In order to have pigs available for research purposes, 3 isolated weaning methods were investigated over 16 trials. The pigs were not medicated or vaccinated. For method 1, pregnant gilts were transported to isolation facilities and allowed to farrow. In 2 of 4 trials, 130 pigs were weaned at 21 days of age and raised free of Salmonella spp. For method 2, gilts were farrowed in the source herd and at weaning, pigs were transported to isolation facilities at 14 to 17 days of age. In 4 of 5 trials, 68 pigs were raised free of Salmonella spp. For method 3, gilts were farrowed in the source herd and at weaning, pigs were transported to isolation facilities at 10 to 14 days of age. In 7 of 7 trials, 172 pigs were raised free of Salmonella spp. A group of 42 pigs was followed through 32 weeks of age. Two pigs became infected with Salmonella between weeks 24 and 32. These data indicate that the likelihood of infection of pigs with Salmonella spp. is markedly decresed by use of isolated weaning techniques and suggest that use of isolated weaning techniques is a practical approach for raising and maintaining pigs free of Salmonella spp.

Last Modified: 11/28/2014
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