[Normal intestinal flora and prevention of intestinal tract infection].
D000818:Animals; D001419:Bacteria / Q000302:isolation & purification*; D001424:Bacterial Infections / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007223:Infant; D007410:Intestinal Diseases / Q000517:prevention & control*; D007422:Intestines / Q000382:microbiology*