Immature Prosthodendrium sp. in a lesser Scaup (Aythya affinis).
D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology* / Q000473:pathology; D001717:Birds; D007668:Kidney / Q000473:pathology; D008396:Maryland; D014200:Trematoda / Q000302:isolation & purification*; D014201:Trematode Infections / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*