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Phylodynamic analysis and molecular diversity of the avian infectious bronchitis virus of chickens in Brazil. | LitMetric

Phylodynamic analysis and molecular diversity of the avian infectious bronchitis virus of chickens in Brazil.

Infect Genet Evol

Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil, Canoas, Brazil; Simbios Biotecnologia, Cachoeirinha, Brazil.

Published: July 2018

AI Article Synopsis

Article Abstract

Avian infectious bronchitis virus (IBV) is the etiological agent of a highly contagious disease, which results in severe economic losses to the poultry industry. The spike protein (S1 subunit) is responsible for the molecular diversity of the virus and many sero/genotypes are described around the world. Recently a new standardized classification of the IBV molecular diversity was conducted, based on phylogenetic analysis of the S1 gene sequences sampled worldwide. Brazil is one of the biggest poultry producers in the world and the present study aimed to review the molecular diversity and reconstruct the evolutionary history of IBV in the country. All IBV S1 gene sequences, with local and year of collection information available on GenBank, were retrieved. Phylogenetic analyses were carried out based on a maximum likelihood method for the classification of genotypes occurring in Brazil, according to the new classification. Bayesian phylogenetic analyses were performed with the Brazilian clade and related international sequences to determine the evolutionary history of IBV in Brazil. A total of 143 Brazilian sequences were classified as GI-11 and 46 as GI-1 (Mass). Within the GI-11 clade, we have identified a potential recombinant strain circulating in Brazil. Phylodynamic analysis demonstrated that IBV GI-11 lineage was introduced in Brazil in the 1950s (1951, 1917-1975 95% HPD) and population dynamics was mostly constant throughout the time. Despite the national vaccination protocols, our results show the widespread dissemination and maintenance of the IBV GI-11 lineage in Brazil and highlight the importance of continuous surveillance to evaluate the impact of currently used vaccine strains on the observed viral diversity of the country.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7173207PMC
http://dx.doi.org/10.1016/j.meegid.2018.03.014DOI Listing

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