Trematode cataract in fresh water fish.
D000818:Animals; D001715:Bird Diseases; D002386:Cataract / Q000209:etiology / Q000662:veterinary*; D005399:Fishes; D012908:Snails; D014200:Trematoda / Q000254:growth & development; D014201:Trematode Infections / Q000662:veterinary*