title: Runting of ducklings associated with Cochlosoma anatis infection.
abstract: Ducklings, especially common goldeneye (Bucephala clangula), experiencing poor weight gain and delayed development were reported from a waterfowl park during June and July of 1990. Runting was first noticed between days 5 and 10 post-hatch in the "brooder" building, and although ducklings appeared active and were feeding, they developed at a slower rate than other members of their clutch. Many ultimately died of emaciation and gram-negative bacterial septicemia. Necropsies of affected ducklings revealed large numbers of the intestinal flagellate Cochlosoma anatis, in both the small and the large intestine; however, autolysis impaired histological interpretation in many cases. Inoculation of 1-day-old Muscovy ducklings with feces containing large numbers of C. anatis resulted in poor weight gain and delayed tail-feather development compared with uninoculated control ducklings. Weight gain improved after treatment with metronidazole. Cochlosoma anatis is associated with the runting syndrome observed in ducklings at the waterfowl park.
authors.affiliation: Canadian Cooperative Wildlife Health Centre, Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada.
authors.forename: T K
authors.initials: TK
authors.lastname: Bollinger
authors.forename: I K
authors.initials: IK
authors.lastname: Barker
mesh_terms: D000818:Animals; D001835:Body Weight / Q000502:physiology*; D004372:Ducks / Q000469:parasitology*; D005260:Female; D006130:Growth Disorders / Q000469:parasitology / Q000662:veterinary*; D008297:Male; D011201:Poultry Diseases / Q000469:parasitology*; D011528:Protozoan Infections / Q000150:complications; D011529:Protozoan Infections, Animal; D013997:Time Factors