The indigenous flora of the gastrointestinal tract.
D000818:Animals; D001439:Bacteroides; D002432:Cecum / Q000382:microbiology; D004925:Escherichia; D005856:Germ-Free Life; D006801:Humans; D007085:Ilium / Q000473:pathology; D007422:Intestines; D007778:Lactobacillus; D051379:Mice; D013270:Stomach / Q000382:microbiology*; D013291:Streptococcus