Intestinal helminths.
D002590:Cestode Infections / Q000451:nursing; D006373:Helminthiasis / Q000451:nursing* / Q000635:transmission; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000209:etiology / Q000451:nursing* / Q000635:transmission; D009349:Nematode Infections / Q000451:nursing