title: Phylogenetic analysis of the S1 glycoprotein gene of infectious bronchitis viruses isolated in China during 2009-2010.
abstract: As part of our ongoing surveillance program, 40 field strains of avian infectious bronchitis virus (IBV) were isolated from dead or diseased chicken flocks in different areas of China between 2009 and 2010. S1 glycoprotein genes of these strains were sequenced and analyzed with 38 strains published in GenBank. S1 genes of these isolated strains and the vaccine strains showed nucleotide homologies ranging from 65.2 to 82% and amino acid homologies ranging from 58.4 to 81.9%. Meanwhile, Chinese IBV strains isolated in this study, which were mainly nephropathogenic, could be separated into six variant lineages (CH I-CH VI), and current vaccine strains used in China formed Mass variant lineage that is evolutionarily distant from Chinese isolates. Moreover, CK/CH/GD/NC10, CK/CH/GD/KP10, and our previous isolates TC07-2 formed the CH VI lineage, showing larger evolutionary distances from other strains. Taken together, these findings suggested that various variant lineages were co-circulating in China now, and appeared to be continuously evolving, alternative indigenous vaccines indeed need for effective control of IB in China.
authors.affiliation: State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Luo
authors.forename: Jianping
authors.initials: J
authors.lastname: Qin
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Qingmei
authors.initials: Q
authors.lastname: Xie
authors.forename: Yingzuo
authors.initials: Y
authors.lastname: Bi
authors.forename: Yongchang
authors.initials: Y
authors.lastname: Cao
authors.forename: Chunyi
authors.initials: C
authors.lastname: Xue
mesh_terms: D000818:Animals; D002645:Chickens; D002681:China; D018352:Coronavirus Infections / Q000662:veterinary* / Q000821:virology; D019143:Evolution, Molecular; D001351:Infectious bronchitis virus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D008562:Membrane Glycoproteins / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D011201:Poultry Diseases / Q000821:virology*; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins / Q000235:genetics*
chemical_list: D008562:Membrane Glycoproteins; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins