Effect of Mannanoligosaccharide on Intestinal Bacteria Populations and Immune Response of Weaned Pigs

Forty eight 35-year-old weaned pigs were divided into two groups randomly. The control group was fed with basal diet,the other group was fed with 0 3% Mannanoligosaccharide+basal diet. In the course of the experiment for 28 days, weanling pigs were observed; feed intake and body weight per weanling pig were recorded; serum and the whole blood of pigs were collected to be analyzed. At the same time, six piglets of each group were selected on 42-year-old to measure the caecal and colonic microflora population and pH. The result showed that Group MOS made diarrhea frequency of weanling pigs decrease by 54 percent; Group MOS had significant effect (P0 01) on the number of T lymphocyte (CD\-3) and IgG content in peripheral blood. Group MOS had significant effect (P0 01) on activities of SOD and GSH-PX in serum of pigs. Daily gain of gummer and feed conversion efficiency increased in treatment groups. caecal and colon E.coli concentration of MOS group was lower(P0 05) than that of the control group; caecal lactobacilli and bifidobacteria concentration were higher(P0 05),but colon lactobacilli and bifidobacteria concentration had no significant difference(P0 05)in contrast with the control group.