Abstract
Eighty-five pigs (initially 12.9 lb and 15 ±1 d of age) were used in two 28-d trials to determine the effects of the probiotics BioPlus 2B (a bacillus-based product from Chr. Hansen BioSystems), a source of Bacillus subtilis and Bacillus licheniformis, and Levucell SB (an active dry yeast product from Lallemand Animal Nutrition), a yeast (Saccharomyces cerevisiae) product that is a source of mannanoligosaccharides on growth and performance of Salmonella enterica serovar Typhimurium shedding in a young growing pig model. Pigs were fed one of five dietary treatments: 1) A control diet containing no probiotics or antibiotics; 2) the control diet with carbadox (50 g/ton); 3) the control diet with Bio-Plus 2B (0.05% of the diet); 4) the control diet with Levucell SB (100 g/ton); 5) the control diet with Bioplus 2B (0.05% of the diet) and Levucell SB (100 g/ton). Diets did not contain growth promoting levels of zinc oxide or copper sulfate. Significant differences in the two trials were seen, with the second trial having 0.1 lb/d greater growth and .18 lb/d greater feed intake than the first trial. In trial 1, pigs fed the control diet and Bioplus 2B had greater gains and feed intakes (P<0.05 and P<0.02 respectively) than those fed carbadox. In trial two, pigs fed carbadox had better performance than those fed the control and combination diets, with the BioPlus 2B and Levucell SB treatments having intermediate growth and feed intake. Fecal shedding rates of salmonella were not different (P>0.10) between diets. Results indicate that within an environment where enteric disease may be active, BioPlus 2B and Levucell SB may provide growth enhancement over a diet devoid of antimicrobials.; Swine Day, 2003, Kansas State University, Manhattan, KS, 2003
Highlights
With greater consumer concerns over antibiotic resistance, there has been increased pressure to remove and find alternatives to antibiotics in livestock diets Alternatives to antimicrobials that may hold promise include probiotic feed additives
Eighty-five pigs were used in two 28-d trials to determine the effects of the probiotics BioPlus 2B
Hansen BioSystems), a source of Bacillus subtilis and Bacillus licheniformis, and Levucell SB, a yeast (Saccharomyces cerevisiae) product that is a source of mannanoligosaccharides on growth and performance of Salmonella enterica serovar Typhimurium shedding in a young growing pig model
Summary
With greater consumer concerns over antibiotic resistance, there has been increased pressure to remove and find alternatives to antibiotics in livestock diets Alternatives to antimicrobials that may hold promise include probiotic feed additives. Supplementation of swine diets with probiotics to alter the intestinal microbial population and to promote gut health has shown variable responses in growth. Possible reasons for variation among trials may be due to various levels and species of enteric organisms within production sys-. Weanling pigs were fed the probiotics Bioplus 2B, a bacillus-based product, and Levucell SB, an active yeast culture, in order to determine the growth responses and bacterial shedding rates in the presence of an orally administered enteric pathogenic challenge
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