FEED RELATED INTERVENTIONS IN PIG HERDS WITH A HIGH SALMONELLA SERO-PREVALENCE - THE DANISH EXPERIENCE
J. DAHL

Abstract
The Danish salmonella programme began in 1995. Field results have not been as successful as studies under strict controls. Herds using home-mixed feed often had a lower sero-prevalence. Meal feeding increases the viscosity of the stomach contents, reduces the coliforms and increases the stomach acid. Barley may reduce sero-prevalence, organic acids will also reduce the sero-prevalence. Liquid feed will reduce sero-prevalence only if the pH is below 5.5 (I recommend 4.5). Infected weaners and growers are a potential risk. There are three main areas for control - prevent infection from entering, use hygiene to prevent spread within the herd and use feed interventions to enhance pig resistance. The practical guidelines to implement these measures are discussed.

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