Duck hepatitis virus and Chlamydia psittaci outbreak.
D000818:Animals; D002691:Chlamydophila psittaci / Q000302:isolation & purification; D004196:Disease Outbreaks / Q000662:veterinary*; D004372:Ducks; D004739:England; D004769:Enterovirus Infections / Q000662:veterinary*; D004371:Hepatitis Virus, Duck; D011201:Poultry Diseases / Q000401:mortality; D009956:Psittacosis / Q000662:veterinary*