Anaemia and the fish-tapeworm.
D000748:Anemia, Macrocytic / Q000209:etiology*; D000749:Anemia, Megaloblastic / Q000209:etiology*; D000818:Animals; D004169:Diphyllobothriasis / Q000150:complications*; D005399:Fishes / Q000469:parasitology; D006801:Humans; D008875:Middle Aged; D014806:Vitamin B 12 Deficiency / Q000209:etiology