title: Genetic diversity of avian infectious bronchitis virus isolates in Korea between 2003 and 2006.
abstract: Thirty-three field isolates of avian infectious bronchitis virus (IBV) were recovered from commercial chicken flocks in Korea between 2003 and 2006 and were characterized phylogenetically by nucleotide sequence analysis of the IBV S1 gene hyper-variable region. Our phylogenetic analysis revealed that recent field isolates of IBV formed at least three distinct phylogenetic types, including K-I, K-II, and K-III. K-I type IBV consisted of indigenous, 13 IBV isolates which evolved from the Kr-EJ/95 strain and then separated into the lineages of type K-Ia and type K-Ib. K-II type IBV isolates (n = 19) were closely related to nephropathogenic IBV variants from China and Japan. The K-III type isolate (Kr/D064/05), first identified by this study, was closely related to enteric IBV variants from the Chinese strains that cause proventriculitis. Sequence comparisons showed amino acid differences of >27.5% between IBV types. The molecular epidemiologic characteristics of IBV field isolates are briefly discussed.
authors.affiliation: Avian Diseases Division, National Veterinary Research and Quarantine Service, 480 Anyang-6, Anyang, Gyeonggi, 430-824, South Korea.
authors.forename: Eun-Kyoung
authors.initials: EK
authors.lastname: Lee
authors.forename: Woo-Jin
authors.initials: WJ
authors.lastname: Jeon
authors.forename: Youn-Jeong
authors.initials: YJ
authors.lastname: Lee
authors.forename: Ok-Mi
authors.initials: OM
authors.lastname: Jeong
authors.forename: Jun-Gu
authors.initials: JG
authors.lastname: Choi
authors.forename: Jun-Hun
authors.initials: JH
authors.lastname: Kwon
authors.forename: Kang-Seuk
authors.initials: KS
authors.lastname: Choi
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002645:Chickens; D018352:Coronavirus Infections / Q000662:veterinary* / Q000821:virology; D017931:DNA Primers / Q000235:genetics; D005814:Genes, Viral; D014644:Genetic Variation; D001351:Infectious bronchitis virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification*; D007723:Korea; D008969:Molecular Sequence Data; D010802:Phylogeny; D011201:Poultry Diseases / Q000821:virology*; D012367:RNA, Viral / Q000235:genetics; D017386:Sequence Homology, Amino Acid
chemical_list: D017931:DNA Primers; D012367:RNA, Viral