title: Prevalence of duck circovirus infection of subclinical pekin ducks in South Korea.
abstract: An investigation was carried out to determine the prevalence and infection pattern of duck circovirus (DuCV) in subclinical Pekin ducks on South Korean duck farms. A total of 147 samples collected from 92 duck farms in five provinces were examined from 2011 to 2012. The overall prevalence of DuCV PCR-positive pooled bursa of Fabricius and liver samples was 21.8% (32/147). The prevalence of DuCV PCR-positive samples increased significantly in 3-week-old ducks compared with that in 1-week-old ducks (P<0.05). DuCV in association with Riemerella and Salmonella infections (10.9%; 16/147) occurred at the same level as infection with DuCV alone (10.9%; 16/147). In comparison of the relationship between bacterial diseases (salmonellosis, Riemerella infection) and morbidity in farms with and without DuCV, morbidity was higher in circovirus-positive farms (50%; 16/32) than in circovirus-negative farms (26.1%; 30/115). Our findings provide baseline information on the degree of DuCV infection and distribution and pattern of DuCV in ducks, and it is evident that DuCV can be associated with subclinical diseases and that subclinical infection could be economically important.
authors.affiliation: Departments of Infectious Diseases & Avian Diseases, College of Veterinary Medicine and Korea Zoonosis Research Institute, Chonbuk National University, Chonbuk, South Korea.
authors.forename: Se-Yeoun
authors.initials: SY
authors.lastname: Cha
authors.forename: Eu-Tteum
authors.initials: ET
authors.lastname: Song
authors.forename: Min
authors.initials: M
authors.lastname: Kang
authors.forename: Bai
authors.initials: B
authors.lastname: Wei
authors.forename: Hye-Suk
authors.initials: HS
authors.lastname: Seo
authors.forename: Jae-Hee
authors.initials: JH
authors.lastname: Roh
authors.forename: Ran-Hee
authors.initials: RH
authors.lastname: Yoon
authors.forename: Oun-Kyoung
authors.initials: OK
authors.lastname: Moon
authors.forename: Hyung-Kwan
authors.initials: HK
authors.lastname: Jang
mesh_terms: D000367:Age Factors; D000818:Animals; D058345:Asymptomatic Infections / Q000453:epidemiology*; D001483:Base Sequence; D002060:Bursa of Fabricius / Q000821:virology; D018173:Circoviridae Infections / Q000453:epidemiology / Q000662:veterinary*; D060085:Coinfection / Q000382:microbiology / Q000662:veterinary*; D017931:DNA Primers / Q000235:genetics; D004372:Ducks; D045826:Flavobacteriaceae Infections / Q000453:epidemiology / Q000662:veterinary; D008099:Liver / Q000821:virology; D008969:Molecular Sequence Data; D011201:Poultry Diseases / Q000453:epidemiology* / Q000821:virology*; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology; D060494:Riemerella; D012481:Salmonella Infections, Animal / Q000453:epidemiology; D017422:Sequence Analysis, DNA / Q000662:veterinary
chemical_list: D017931:DNA Primers