May 7, 2007

Pre-biotic effect helps to reduce salmonella ZAP scores

Biosecurity in salmonella not only enhances gut health in weaners, it can also improve salmonella Zoonoses Action Plan (ZAP) scores.

Study shows feed additives that promote the presence of beneficial bacteria can improve gut development in weanig pig, microbial gut flora and immunology as well as defend against diseases such as Salmonella.

Optimum performance can only be expected if weaners have a healthy gastrointestinal tract but pathogens such as E.coli and Salmonella can damage intestinal epithelium that cause diseases in pigs. The result is often seen as persistent sub-clinical disease and consistent production losses. Many harmful micro organisms attach to intestinal cells via mannose-bearing lectins which protect their cell walls.

However, research has found that using pre-biotics can block this mannose-effect and prevent the pathogen cells attaching to the intestinal wall, reducing the bacteria's ability to colonize.

Using a pre-biotic optimises gut conditions for beneficial bacteria, such as Lactobacilli, and improves gut integrity and villi architecture. The overall benefit is better nutrient absorption and more efficient feed conversion.

Research from 54 studies said a combined analysis comparison (meta-analysis), reported positive responses of weaned piglets when an organic yeast based additive was included in the swine's diet.

Results showed a 2.1% (p=0.3) improvement in feed intake, a 4.1 percent increase in growth rate (P<0.001) and 2.3 percent better feed conversion efficiency (p<0.001).

An increasing interest in dietary manipulation to control enteric disease, particularly Salmonella has been noted in swine animal health development. The use of enzymes, probiotics and acidification have been shown to reduce infection levels however, results are inconsistent and appear to be very herd specific. More research is required and producers are being encouraged to co-operate with their vets and nutritionist.