title: A teratoma in a duck infected congenitally with duck hepatitis B virus.
abstract: A teratoma was diagnosed in an 8-month-old pekin duck based on the presence of tissue derived from embryonic ectoderm, mesoderm, and endoderm in the neoplasm. The neoplasm was examined for the presence of duck hepatitis B virus, because the duck was congenitally infected with the virus, a member of the hepadnavirus family that is associated with hepatic neoplasms in hepadnavirus-infected mammals. Persistent infection occurred in the liver, but no evidence of viral infection was found in the neoplasm.
authors.affiliation: Department of Microbiology, Pathology, and Parasitology, College of Veterinary Medicine, North Carolina State University, Raleigh 27606.
authors.forename: J M
authors.initials: JM
authors.lastname: Cullen
authors.forename: J E
authors.initials: JE
authors.lastname: Newbold
authors.forename: G J
authors.initials: GJ
authors.lastname: Sherman
mesh_terms: D000818:Animals; D004372:Ducks; D015611:Hepatitis B Virus, Duck / Q000302:isolation & purification*; D006524:Hepatitis, Viral, Animal / Q000150:complications*; D008297:Male; D010534:Peritoneal Neoplasms / Q000150:complications / Q000382:microbiology / Q000662:veterinary; D011201:Poultry Diseases / Q000382:microbiology*; D013724:Teratoma / Q000150:complications / Q000382:microbiology / Q000662:veterinary*