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Origin and diversity of novel avian influenza A H7N9 viruses causing human infection: phylogenetic, structural, and coalescent analyses

Summary Background On March 30, 2013, a novel avian influenza A H7N9 virus that infects human beings was identified. This virus had been detected in six provinces and municipal cities in China as of April 18, 2013. We correlated genomic sequences from avian influenza viruses with ecological informat... Full description

Journal Title: The Lancet (British edition) 2013, Vol.381 (9881), p.1926-1932
Main Author: Liu, Di, PhD
Other Authors: Shi, Weifeng, PhD , Shi, Yi, PhD , Wang, Dayan, PhD , Xiao, Haixia , Li, Wei, MSc , Bi, Yuhai, PhD , Wu, Ying, PhD , Li, Xianbin, BSc , Yan, Jinghua, Prof , Liu, Wenjun, Prof , Zhao, Guoping, Prof , Yang, Weizhong, Prof , Wang, Yu, Prof , Ma, Juncai, Prof , Shu, Yuelong, Prof , Lei, Fumin, Prof , Gao, George F, Prof
Format: Electronic Article Electronic Article
Language: English
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Quelle: Alma/SFX Local Collection
Publisher: Kidlington: Elsevier Ltd
ID: ISSN: 0140-6736
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title: Origin and diversity of novel avian influenza A H7N9 viruses causing human infection: phylogenetic, structural, and coalescent analyses
format: Article
creator:
  • Liu, Di, PhD
  • Shi, Weifeng, PhD
  • Shi, Yi, PhD
  • Wang, Dayan, PhD
  • Xiao, Haixia
  • Li, Wei, MSc
  • Bi, Yuhai, PhD
  • Wu, Ying, PhD
  • Li, Xianbin, BSc
  • Yan, Jinghua, Prof
  • Liu, Wenjun, Prof
  • Zhao, Guoping, Prof
  • Yang, Weizhong, Prof
  • Wang, Yu, Prof
  • Ma, Juncai, Prof
  • Shu, Yuelong, Prof
  • Lei, Fumin, Prof
  • Gao, George F, Prof
subjects:
  • Abridged Index Medicus
  • Animals
  • Avian influenza
  • Biological and medical sciences
  • Biological Evolution
  • Bird migration
  • Ducks
  • General aspects
  • Genetic aspects
  • Genome, Viral - genetics
  • Human viral diseases
  • Infectious diseases
  • Influenza
  • Influenza A virus - genetics
  • Influenza in Birds - virology
  • Influenza virus
  • Influenza viruses
  • Internal Medicine
  • Markov Chains
  • Medical sciences
  • Phenotype
  • Phylogeny
  • Physiological aspects
  • Poultry
  • Sequence Alignment - methods
  • Sequence Homology
  • Trees
  • Viral diseases
  • Viral diseases of the respiratory system and ent viral diseases
ispartof: The Lancet (British edition), 2013, Vol.381 (9881), p.1926-1932
description: Summary Background On March 30, 2013, a novel avian influenza A H7N9 virus that infects human beings was identified. This virus had been detected in six provinces and municipal cities in China as of April 18, 2013. We correlated genomic sequences from avian influenza viruses with ecological information and did phylogenetic and coalescent analyses to extrapolate the potential origins of the virus and possible routes of reassortment events. Methods We downloaded H7N9 virus genome sequences from the Global Initiative on Sharing Avian Influenza Data (GISAID) database and public sequences used from the Influenza Virus Resource. We constructed phylogenetic trees and did 1000 bootstrap replicates for each tree. Two rounds of phylogenetic analyses were done. We used at least 100 closely related sequences for each gene to infer the overall topology, removed suspicious sequences from the trees, and focused on the closest clades to the novel H7N9 viruses. We compared our tree topologies with those from a bayesian evolutionary analysis by sampling trees (BEAST) analysis. We used the bayesian Markov chain Monte Carlo method to jointly estimate phylogenies, divergence times, and other evolutionary parameters for all eight gene fragments. We used sequence alignment and homology-modelling methods to study specific mutations regarding phenotypes, specifically addressing the human receptor binding properties. Findings The novel avian influenza A H7N9 virus originated from multiple reassortment events. The HA gene might have originated from avian influenza viruses of duck origin, and the NA gene might have transferred from migratory birds infected with avian influenza viruses along the east Asian flyway. The six internal genes of this virus probably originated from two different groups of H9N2 avian influenza viruses, which were isolated from chickens. Detailed analyses also showed that ducks and chickens probably acted as the intermediate hosts leading to the emergence of this virulent H7N9 virus. Genotypic and potential phenotypic differences imply that the isolates causing this outbreak form two separate subclades. Interpretation The novel avian influenza A H7N9 virus might have evolved from at least four origins. Diversity among isolates implies that the H7N9 virus has evolved into at least two different lineages. Unknown intermediate hosts involved might be implicated, extensive global surveillance is needed, and domestic-poultry-to-person transmission should be closely
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0140-6736
fulltext: fulltext
issn:
  • 0140-6736
  • 1474-547X
url: Link


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titleOrigin and diversity of novel avian influenza A H7N9 viruses causing human infection: phylogenetic, structural, and coalescent analyses
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creatorLiu, Di, PhD ; Shi, Weifeng, PhD ; Shi, Yi, PhD ; Wang, Dayan, PhD ; Xiao, Haixia ; Li, Wei, MSc ; Bi, Yuhai, PhD ; Wu, Ying, PhD ; Li, Xianbin, BSc ; Yan, Jinghua, Prof ; Liu, Wenjun, Prof ; Zhao, Guoping, Prof ; Yang, Weizhong, Prof ; Wang, Yu, Prof ; Ma, Juncai, Prof ; Shu, Yuelong, Prof ; Lei, Fumin, Prof ; Gao, George F, Prof
creatorcontribLiu, Di, PhD ; Shi, Weifeng, PhD ; Shi, Yi, PhD ; Wang, Dayan, PhD ; Xiao, Haixia ; Li, Wei, MSc ; Bi, Yuhai, PhD ; Wu, Ying, PhD ; Li, Xianbin, BSc ; Yan, Jinghua, Prof ; Liu, Wenjun, Prof ; Zhao, Guoping, Prof ; Yang, Weizhong, Prof ; Wang, Yu, Prof ; Ma, Juncai, Prof ; Shu, Yuelong, Prof ; Lei, Fumin, Prof ; Gao, George F, Prof
descriptionSummary Background On March 30, 2013, a novel avian influenza A H7N9 virus that infects human beings was identified. This virus had been detected in six provinces and municipal cities in China as of April 18, 2013. We correlated genomic sequences from avian influenza viruses with ecological information and did phylogenetic and coalescent analyses to extrapolate the potential origins of the virus and possible routes of reassortment events. Methods We downloaded H7N9 virus genome sequences from the Global Initiative on Sharing Avian Influenza Data (GISAID) database and public sequences used from the Influenza Virus Resource. We constructed phylogenetic trees and did 1000 bootstrap replicates for each tree. Two rounds of phylogenetic analyses were done. We used at least 100 closely related sequences for each gene to infer the overall topology, removed suspicious sequences from the trees, and focused on the closest clades to the novel H7N9 viruses. We compared our tree topologies with those from a bayesian evolutionary analysis by sampling trees (BEAST) analysis. We used the bayesian Markov chain Monte Carlo method to jointly estimate phylogenies, divergence times, and other evolutionary parameters for all eight gene fragments. We used sequence alignment and homology-modelling methods to study specific mutations regarding phenotypes, specifically addressing the human receptor binding properties. Findings The novel avian influenza A H7N9 virus originated from multiple reassortment events. The HA gene might have originated from avian influenza viruses of duck origin, and the NA gene might have transferred from migratory birds infected with avian influenza viruses along the east Asian flyway. The six internal genes of this virus probably originated from two different groups of H9N2 avian influenza viruses, which were isolated from chickens. Detailed analyses also showed that ducks and chickens probably acted as the intermediate hosts leading to the emergence of this virulent H7N9 virus. Genotypic and potential phenotypic differences imply that the isolates causing this outbreak form two separate subclades. Interpretation The novel avian influenza A H7N9 virus might have evolved from at least four origins. Diversity among isolates implies that the H7N9 virus has evolved into at least two different lineages. Unknown intermediate hosts involved might be implicated, extensive global surveillance is needed, and domestic-poultry-to-person transmission should be closely watched in the future. Funding China Ministry of Science and Technology Project 973, National Natural Science Foundation of China, China Health and Family Planning Commission, Chinese Academy of Sciences.
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subjectAbridged Index Medicus ; Animals ; Avian influenza ; Biological and medical sciences ; Biological Evolution ; Bird migration ; Ducks ; General aspects ; Genetic aspects ; Genome, Viral - genetics ; Human viral diseases ; Infectious diseases ; Influenza ; Influenza A virus - genetics ; Influenza in Birds - virology ; Influenza virus ; Influenza viruses ; Internal Medicine ; Markov Chains ; Medical sciences ; Phenotype ; Phylogeny ; Physiological aspects ; Poultry ; Sequence Alignment - methods ; Sequence Homology ; Trees ; Viral diseases ; Viral diseases of the respiratory system and ent viral diseases
ispartofThe Lancet (British edition), 2013, Vol.381 (9881), p.1926-1932
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0Origin and diversity of novel avian influenza A H7N9 viruses causing human infection: phylogenetic, structural, and coalescent analyses
1The Lancet (British edition)
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descriptionSummary Background On March 30, 2013, a novel avian influenza A H7N9 virus that infects human beings was identified. This virus had been detected in six provinces and municipal cities in China as of April 18, 2013. We correlated genomic sequences from avian influenza viruses with ecological information and did phylogenetic and coalescent analyses to extrapolate the potential origins of the virus and possible routes of reassortment events. Methods We downloaded H7N9 virus genome sequences from the Global Initiative on Sharing Avian Influenza Data (GISAID) database and public sequences used from the Influenza Virus Resource. We constructed phylogenetic trees and did 1000 bootstrap replicates for each tree. Two rounds of phylogenetic analyses were done. We used at least 100 closely related sequences for each gene to infer the overall topology, removed suspicious sequences from the trees, and focused on the closest clades to the novel H7N9 viruses. We compared our tree topologies with those from a bayesian evolutionary analysis by sampling trees (BEAST) analysis. We used the bayesian Markov chain Monte Carlo method to jointly estimate phylogenies, divergence times, and other evolutionary parameters for all eight gene fragments. We used sequence alignment and homology-modelling methods to study specific mutations regarding phenotypes, specifically addressing the human receptor binding properties. Findings The novel avian influenza A H7N9 virus originated from multiple reassortment events. The HA gene might have originated from avian influenza viruses of duck origin, and the NA gene might have transferred from migratory birds infected with avian influenza viruses along the east Asian flyway. The six internal genes of this virus probably originated from two different groups of H9N2 avian influenza viruses, which were isolated from chickens. Detailed analyses also showed that ducks and chickens probably acted as the intermediate hosts leading to the emergence of this virulent H7N9 virus. Genotypic and potential phenotypic differences imply that the isolates causing this outbreak form two separate subclades. Interpretation The novel avian influenza A H7N9 virus might have evolved from at least four origins. Diversity among isolates implies that the H7N9 virus has evolved into at least two different lineages. Unknown intermediate hosts involved might be implicated, extensive global surveillance is needed, and domestic-poultry-to-person transmission should be closely watched in the future. Funding China Ministry of Science and Technology Project 973, National Natural Science Foundation of China, China Health and Family Planning Commission, Chinese Academy of Sciences.
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titleOrigin and diversity of novel avian influenza A H7N9 viruses causing human infection: phylogenetic, structural, and coalescent analyses
authorLiu, Di, PhD ; Shi, Weifeng, PhD ; Shi, Yi, PhD ; Wang, Dayan, PhD ; Xiao, Haixia ; Li, Wei, MSc ; Bi, Yuhai, PhD ; Wu, Ying, PhD ; Li, Xianbin, BSc ; Yan, Jinghua, Prof ; Liu, Wenjun, Prof ; Zhao, Guoping, Prof ; Yang, Weizhong, Prof ; Wang, Yu, Prof ; Ma, Juncai, Prof ; Shu, Yuelong, Prof ; Lei, Fumin, Prof ; Gao, George F, Prof
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abstractSummary Background On March 30, 2013, a novel avian influenza A H7N9 virus that infects human beings was identified. This virus had been detected in six provinces and municipal cities in China as of April 18, 2013. We correlated genomic sequences from avian influenza viruses with ecological information and did phylogenetic and coalescent analyses to extrapolate the potential origins of the virus and possible routes of reassortment events. Methods We downloaded H7N9 virus genome sequences from the Global Initiative on Sharing Avian Influenza Data (GISAID) database and public sequences used from the Influenza Virus Resource. We constructed phylogenetic trees and did 1000 bootstrap replicates for each tree. Two rounds of phylogenetic analyses were done. We used at least 100 closely related sequences for each gene to infer the overall topology, removed suspicious sequences from the trees, and focused on the closest clades to the novel H7N9 viruses. We compared our tree topologies with those from a bayesian evolutionary analysis by sampling trees (BEAST) analysis. We used the bayesian Markov chain Monte Carlo method to jointly estimate phylogenies, divergence times, and other evolutionary parameters for all eight gene fragments. We used sequence alignment and homology-modelling methods to study specific mutations regarding phenotypes, specifically addressing the human receptor binding properties. Findings The novel avian influenza A H7N9 virus originated from multiple reassortment events. The HA gene might have originated from avian influenza viruses of duck origin, and the NA gene might have transferred from migratory birds infected with avian influenza viruses along the east Asian flyway. The six internal genes of this virus probably originated from two different groups of H9N2 avian influenza viruses, which were isolated from chickens. Detailed analyses also showed that ducks and chickens probably acted as the intermediate hosts leading to the emergence of this virulent H7N9 virus. Genotypic and potential phenotypic differences imply that the isolates causing this outbreak form two separate subclades. Interpretation The novel avian influenza A H7N9 virus might have evolved from at least four origins. Diversity among isolates implies that the H7N9 virus has evolved into at least two different lineages. Unknown intermediate hosts involved might be implicated, extensive global surveillance is needed, and domestic-poultry-to-person transmission should be closely watched in the future. Funding China Ministry of Science and Technology Project 973, National Natural Science Foundation of China, China Health and Family Planning Commission, Chinese Academy of Sciences.
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