title: Epidemiological investigation of outbreaks of fowl adenovirus infection in commercial chickens in Korea.
abstract: In total, 39 clinical cases of fowl adenoviruses (FAdV) infection in chickens (28 broiler, 7 native, and 4 layer chickens) between 2007 and 2010 in Korea were investigated. The FAdV types 4, 8b, and 11 comprised 18, 9, and 12 clinical cases, respectively. All FAdV type 4 cases showed clinical hydropericardium (HPS) lesions as well as inclusion body hepatitis (IBH), whereas all FAdV types 8b and 11 cases exhibited IBH lesions without HPS. All 3 types were detected in broiler (9-30 d old) and layer chickens (23-112 d old), whereas most native chickens (14-65 d old) were affected only by FAdV type 4. Infectious bursal disease virus and chicken infectious anemia virus were complications in 51.3% of FAdV cases, with mortalities of 55% to <0.1%. Chicken infectious anemia virus was detected in all native chicken cases. These results indicate that preventive measures against FAdV infection and immunosuppressive diseases on poultry farms should be implemented.
authors.affiliation: OIE Newcastle Disease Reference Laboratory, Anyang, Republic of Korea.
authors.forename: K S
authors.initials: KS
authors.lastname: Choi
authors.forename: S J
authors.initials: SJ
authors.lastname: Kye
authors.forename: J Y
authors.initials: JY
authors.lastname: Kim
authors.forename: W J
authors.initials: WJ
authors.lastname: Jeon
authors.forename: E K
authors.initials: EK
authors.lastname: Lee
authors.forename: K Y
authors.initials: KY
authors.lastname: Park
authors.forename: H W
authors.initials: HW
authors.lastname: Sung
mesh_terms: D000257:Adenoviridae Infections / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D000818:Animals; D002645:Chickens; D004196:Disease Outbreaks / Q000662:veterinary*; D025681:Fowl adenovirus A / Q000235:genetics*; D017720:Molecular Epidemiology; D058974:Phylogeography; D011201:Poultry Diseases / Q000453:epidemiology / Q000821:virology*; D056910:Republic of Korea / Q000453:epidemiology