title: Elective colo-rectal surgery.
mesh_terms: D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D003106:Colon / Q000601:surgery*; D006801:Humans; D011292:Premedication; D011300:Preoperative Care; D012007:Rectum / Q000601:surgery*
chemical_list: D000900:Anti-Bacterial Agents