title: Introduction to intestinal microecology.
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000627:therapeutic use; D005075:Biological Evolution; D004064:Digestive System / Q000382:microbiology; D004463:Ecology; D005856:Germ-Free Life; D006801:Humans; D007165:Immunosuppression Therapy; D007223:Infant; D007422:Intestines / Q000382:microbiology*; D008136:Longevity; D051379:Mice; D008829:Microbiology; D011878:Radiotherapy; D012867:Skin / Q000382:microbiology
chemical_list: D000890:Anti-Infective Agents