Distribution and molecular characterization of avian infectious bronchitis virus in southern China

Jiamin Lian; Zhanxin Wang; Zhouyi Xu; Tong Chen; Guanming Shao; Xinheng Zhang; Jianping Qin; Qingmei Xie; Wencheng Lin

Poultry Science (Jul 2021)

Distribution and molecular characterization of avian infectious bronchitis virus in southern China

Jiamin Lian,
Zhanxin Wang,
Zhouyi Xu,
Tong Chen,
Guanming Shao,
Xinheng Zhang,
Jianping Qin,
Qingmei Xie,
Wencheng Lin

Affiliations

Jiamin Lian: Guangdong Provincial Animal Virus Vector Vaccine Engineering Technology Research Center, College of Animal Science, South China Agricultural University, Guangzhou, 510642, P.R. China
Zhanxin Wang: Wen's Group Academy, Wen's Foodstuffs Group Co., Ltd., Xinxing, 527400, Guangdong, P.R. China
Zhouyi Xu: Wen's Group Academy, Wen's Foodstuffs Group Co., Ltd., Xinxing, 527400, Guangdong, P.R. China
Tong Chen: Guangdong Provincial Animal Virus Vector Vaccine Engineering Technology Research Center, College of Animal Science, South China Agricultural University, Guangzhou, 510642, P.R. China
Guanming Shao: Guangdong Provincial Animal Virus Vector Vaccine Engineering Technology Research Center, College of Animal Science, South China Agricultural University, Guangzhou, 510642, P.R. China
Xinheng Zhang: Guangdong Provincial Animal Virus Vector Vaccine Engineering Technology Research Center, College of Animal Science, South China Agricultural University, Guangzhou, 510642, P.R. China; Key Laboratory of Healthy Animal Husbandry and Environmental Control of Guangdong Province, Guangzhou, 510642, Guangdong, P.R. China
Jianping Qin: Wen's Group Academy, Wen's Foodstuffs Group Co., Ltd., Xinxing, 527400, Guangdong, P.R. China
Qingmei Xie: Guangdong Provincial Animal Virus Vector Vaccine Engineering Technology Research Center, College of Animal Science, South China Agricultural University, Guangzhou, 510642, P.R. China; Key Laboratory of Healthy Animal Husbandry and Environmental Control of Guangdong Province, Guangzhou, 510642, Guangdong, P.R. China
Wencheng Lin: Guangdong Provincial Animal Virus Vector Vaccine Engineering Technology Research Center, College of Animal Science, South China Agricultural University, Guangzhou, 510642, P.R. China; Key Laboratory of Healthy Animal Husbandry and Environmental Control of Guangdong Province, Guangzhou, 510642, Guangdong, P.R. China; Corresponding author:

Journal volume & issue: Vol. 100, no. 7
p. 101169

Abstract

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ABSTRACT: Avian infectious bronchitis virus (IBV) is causing considerable economic losses in the world poultry industry. The main difficulty of prevention and control of IB disease is the numerous genotypes and serotypes. The genetic analysis of IBV was mainly based on the S1 gene which played an important role in infectivity. In the study, One hundred and thirty-nine strains of avian infectious bronchitis virus were isolated from chickens showing signs of disease in southern China during the period from April 2019 to March 2020. The nucleotide and amino acid sequences from the isolated field strains were compared to 22 published references. Nucleotide homologies ranged from 64.5% to 100% and amino acid homologies ranging from 70% to 99.8%. Six genotype IBV strains were co-circulating in southern China. QX-type was still the most dominant genotype. Alignment of nucleotide and amino acid sequences of S1 gene revealed that the substitutions, insertions and deletions are widely among isolated strains. Recombination analysis showed that there is a large number of recombinant strains amongst these isolates, forming new sub branches, subtypes and variants. Therefore, long-term continuing surveillance is necessary for IBV prevention and control.

Published in Poultry Science

ISSN: 0032-5791 (Print); 1525-3171 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Agriculture: Animal culture
Website: https://www.journals.elsevier.com/poultry-science

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