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ORAL PRESENTATIONS negative status for Salmonella, we were interested in this study to determine if it was possible to develop a protocol that would allow the population of a negative farrowing unit by use of animals from a herd known to be moderately contaminated by Salmonella. Since serology can not detect recently infected animals and since bacteriology can not detect most healthy carriers, we used a combination of serology and bacteriology, ensuring that the last sampling was done after the stress period caused by the selection process. In the first part of this study, we observed that all sampled animals from NP/NS pens were negative after introduction in the new farrowing unit. Interestingly, it was also possible to populate an almost negative section of the new unit by use of PP/NS animals. To do so, few basic measures were applied to these animals such as a Neomycin treatment in water and the washing of gilts at their arrival to the new unit. In addition, few special precautions such as maintenance of the integrity of pens and biosecurity measures such as changing/washing boots between positive and negative pens, were applied throughout the experiment.

Field trials to evaluate the efficacy of mash feed to reduce Salmonella shedding in swine