J.H.  Cho, I.H.  Kim, P.Y.  Zhao, 
    Probiotics as a Dietary Additive for Pigs: A Review,
    Journal of Animal and Veterinary Advances,
    Volume 10,Issue 16,
    2011,
    Pages 2127-2134,
    ISSN 1680-5593,
    javaa.2011.2127.2134,
    (https://makhillpublications.co/view-article.php?doi=javaa.2011.2127.2134)
    Abstract: Probiotics (Direct-Fed Microbial: DFM) have been established for use as a feed additive; researchers have observed many beneficial effects of such by improving the intestinal microbial balance in livestock. The functions of probiotics within a Gastrointestinal Tract (GIT) are suggested to include the following: competing with pathogenic bacteria for nutrients in the gut; competing with pathogens for binding sites on the intestinal epithelium; producing compounds that are toxic to pathogens and Stimulating the immune system. The applications of probiotics provide a potential alternative strategy to antibiotic use in livestock. It is suggested that probiotics should be used as a feed additive in livestock.
    Keywords: microbial balance;Probiotics;pigs;immune system;livestock;feed additive