title: Investigation of the gastrointestinal bacterial flora.
mesh_terms: D000005:Abdomen; D000038:Abscess / Q000209:etiology; D001431:Bacteriological Techniques; D004064:Digestive System / Q000382:microbiology*; D005753:Gastric Mucosa / Q000382:microbiology; D006801:Humans; D007413:Intestinal Mucosa / Q000382:microbiology; D007416:Intestinal Perforation; D010538:Peritonitis / Q000209:etiology; D013048:Specimen Handling; D013530:Surgical Wound Infection / Q000209:etiology