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KMID : 1023520150380010051
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Korean Journal of Veterinary Service
2015 Volume.38 No. 1 p.51 ~ p.56
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Genetic characterization and phylogenetic analysis of infectious bronchitis virus isolated in Jeonbuk
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Chu Keum-Suk
Kim JI-Hyun
Lee Jeong-Won
Choi Kwang-Lim
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Abstract
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Infectious bronchitis virus (IBV) causes an acute and highly contagious viral disease of chicken that is great economic losses to the poultry industry worldwide. Among the IBV structural proteins, the high rate spike glycoprotein S1 gene mutation and antigenic variant strains have been reported in many countries. During the years 2012∼2014, 10 IBV strains were isolated from infected chicken farms distributed in provinces of Jeonbuk. Analysis of the S1 gene sequences amplified from 10 isolated strains with QX strains showed nucleotide homologies ranging from 96.5 to 95.4%. Phylogenetic analysis revealed that all strains were clustered into QX-like groups. This study suggests that QX-like IBVs are circulating in commercial chicken farms in Jeonbuk. Therefore, the continuing survellance is significantly important for prevention and control of BIV infection.
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KEYWORD
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IBV, S1 gene, Phylogenetic analysis
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