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Avian Influenza and Newcastle Disease
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acute adult affected birds algae algal antibody antigens areas aspergillosis avian cholera Bellrose birds blood botulism Canada Geese captive birds captive waterfowl cause cells chickens cholera chronic clinical signs coccidia common Common Eider containing dead death described diagnosis disease domestic ducks domestic poultry DP virus duck plague ducklings effects eggs eiders epizootic epizootiology examined experimental exposure Fallis feeding free-flying gametocytes gizzard Goose Green-winged Teal gross lesions gulls Heddleston hemorrhage hepatic histologic infection influenza ingested intermediate host intestine invertebrates isolated large numbers lead poisoning Leibovitz Lesser Snow Lesser Snow Geese levels liver Mallards megaloschizonts mercury mortality mucosa multocida Mute Swan necropsy necrotic normal occur oocysts organism outbreak parasites Pasteurella pathogenic Pathology Pekin ducks pesticides Plasmodium population present proventriculus reported residues respiratory salmonellae samples schizonts shot species specimens spleen suggested susceptible terfowl tissues toxic toxin tract viruses wild birds wild waterfowl Wildl Wildlife Wobeser