Abstract
Background: The present study was designed to evaluate alterations in the immunological status of the small intestine after dietary inclusion of probiotic and zinc in pre and post-weaned piglets. Methods: For the present study, 18 healthy Large White Yorkshire (LWY) piglets, irrespective of sex, were divided into three different age groups [pre-weaning (20 days old, n = 3), weaning (30 days old, n = 3) and post-weaning (60 days old, n = 3)]. The piglets were weaned at 28 days of age. They were divided into control group (C) fed with basal diet and treatment group (T) fed with combined probiotic and zinc oral supplement along with the basal diet. A probiotic mixture consisted of Lactobacillus acidophilus, Lactobacillus rhamnosus and Bifidobacterium longum (1.25x109cfu/d for 10 days) along with zinc supplement (ZnO @ 2000 ppm/d for 10 days) administered orally to the treatment group of piglets. Result: The relative expression of TNF-α, IL-1β and IL-6 genes was significantly higher (P less than 0.05) in the treatment group of piglets as compared to the control group. However, the expression of IL-8, IL-12p40 and IL-18 genes were significantly lower (P less than 0.05) after oral administration of probiotic and zinc to the piglets.
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