National Center for International Research on Animal Gut Nutrition,Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health,National Experimental Teaching Demonstration Center of Animal Science,Laboratory of Gastrointestinal Microbiology,College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;
Barrier function; Galacto-oligosaccharides; Intestinal microbiota; Lipopolysaccharides; Suckling piglets;