Mechanisms confining indigenous bacteria to the gastrointestinal tract.
D000818:Animals; D004064:Digestive System / Q000382:microbiology*; D005856:Germ-Free Life; D007109:Immunity; D007668:Kidney / Q000382:microbiology; D008099:Liver / Q000382:microbiology; D008198:Lymph Nodes / Q000382:microbiology; D008643:Mesentery; D051379:Mice; D013047:Specific Pathogen-Free Organisms; D013154:Spleen / Q000382:microbiology; D013950:Thymus Gland / Q000502:physiology