Effects of Live Yeast and Yeast Extracts with and without Pharmacological Levels of Zinc on Nursery Pig Growth Performance and Fecal Consistency

A total of 360 weanling barrows (Line 200 × 400, DNA Genetics; initial BW 12.4 ± 0.05 lb) were used in a 42-d study to evaluate yeast-based pre- and probiotics (Phileo by Lesaffre, Milwaukee, WI) diets with or without pharmacological levels Zn on growth performance fecal dry matter (DM). Pens assigned 1 4 dietary treatments 5 pigs per pen 18 pens treatment. Dietary arranged 2 factorial main effects live (none vs. 0.10% ActiSaf Sc 47 HR+, 0.05% SafMannan, NucleoSaf from d 0 7, then concentrations lowered 50% day 7 21) (110 3,000 ppm 2,000 21 provided ZnO). All fed common diet 42 post-weaning. There no yeast interactions due additives observed any response criteria. From 42, had increased (P < 0.001) ADG ADFI. Fecal samples collected 4, 21, the same three for DM analysis. On greater = 0.043); however, differences 42. In conclusion, ADG, ADFI, post-weaning DM. was extracts