Occurrence of two new Goussia species in the intestine of the sterlet (Acipenser ruthenus).
D000818:Animals; D003048:Coccidiosis / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*; D005393:Fish Diseases / Q000469:parasitology* / Q000473:pathology; D005399:Fishes; D007411:Intestinal Diseases, Parasitic / Q000473:pathology / Q000662:veterinary*