| Serotype and genotype diversity of infectious bronchitis viruses isolated during 1985-2008 in Guangxi, China. | The genetic diversity of the hypervariable region I of S1 gene (HVR I) of infectious bronchitis (IB) vaccine strains H120, Ma5 and 4/91 was compared to that of 26 infectious bronchitis virus (IBV) strains isolated from the field in Guangxi province of China during the years 1985-2008, and the field isolates were classified into five major genotypes. Monovalent antisera against three vaccine strains and seven field isolates of different genotypes were prepared by immunizing rabbits with mineral o ... | 2011 | 22198411 |
| [evaluation of antigenic relationship of guangxi isolates of infectious bronchitis virus]. | monovalent antisera of 3 vaccine strains and 7 representative field isolates were prepared based on the comparison of genetic diversity of the hypervariable region i of s1 gene (hvr i from 3 infectious bronchitis (ib) vaccine strains (h120, ma5 and 4/91) ,one reference strain m41 and 26 ib field isolates. these 30 strains were classified in 7 different genotypes, respectively. virus-neutralizing test on tracheal organ cultures (toc) with chicken embryo were used to evaluate relatedness values of ... | 2012 | 23367560 |
| [genotypes and serotypes of avian infectious bronchitis viruses isolated during 2009-2011 in guangxi, china]. | in order to investigate the prevalence and track genetic and antigenic evolutions of infectious bronchitis virus (ibv) and their prevalence in guangxi, china since 1985, gene amplification and sequencing and virus neutralization (vn) test on chicken embryo tracheal organ cultures were used in genotyping and serotyping of 28 ibv isolates during 2009-2011 in guangxi. the results of n gene sequencing and comparison showed that the 28 isolates and reference strains were classified into three groups, ... | 2014 | 24923170 |
| continuous evolution of avian infectious bronchitis virus resulting in different variants co-circulating in southern china. | sixty field strains of avian infectious bronchitis virus (ibv) were isolated from chicken flocks in different regions of guangxi from 1985 to 2012. phylogenetic analysis of s1 subunit glycoprotein genes revealed that field isolates from 2009-2011 mostly belonged to the lx4 type, while those from 1985-2008 belonged to the hn08 type, and a few others belonged to the 4/91 type, the tw type and the mass type. in addition, it is noteworthy that no obvious regional differences were found among these 6 ... | 2013 | 23474985 |
| genome characterization, antigenicity and pathogenicity of a novel infectious bronchitis virus type isolated from south china. | in 2014, three infectious bronchitis virus (ibv) strains, designated as γcov/ck/china/i0111/14, γcov/ck/china/i0114/14 and γcov/ck/china/i0118/14, were isolated and identified from chickens suspected to be infected with ibv in guangxi province, china. based upon data arising from s1 sequence and phylogenetic analyses, the three ibv isolates were genetically different from other known ibv types, which represented a novel genotype (gi-29). virus cross-neutralization tests, using γcov/ck/china/i011 ... | 2017 | 28800976 |