| Summary: | 碩士 === 東海大學 === 畜產與生物科技學系 === 103 === The objectives of this study were to evaluate the effects of commercial probiotics supplementation on growth performance and immunity in pigs. Pigs (n= 24) were randomly assigned into 3 groups: control, treatment A (commercial probiotics product A) and treatment B (commercial probiotics product B). The pigs were fed experimental diets for 119 days. All pigs were weighed every month. Blood samples were collected to measure lymphocyte proliferation and evaluate the proportion of CD4 and CD8 lymphocytes by flow cytometry. The results showed that no significant difference among control and probiotic groups in body weight, daily gain and feed conversion efficiency. The PHA stimulated lymphocytes proliferation, the proportion of CD4 lymphocyte, CD8 lymphocyte proportion, CD4/CD8 ratio and the IL-1β and L-selectin mRNA in neutrophils has no significant difference among control and probiotic groups. The probiotics groups had higher lactic acid bacteria CFU in feces than that in control group. The probiotics groups had lower blood cholesterol content than control group. The probiotics groups had higher foot and mouth disease virus antibody titer than the control group. It concluded that supplementation of commercial probiotics to diet can reduce serum cholesterol and enhance the FMD virus antibody titers in pigs.
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