Registro completo |
Provedor de dados: |
ArchiMer
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País: |
France
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Título: |
Molecular evolution and phylogeography of infectious hematopoietic necrosis virus with a focus on its presence in France over the last 30 years
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Autores: |
Bellec, Laure
Louboutin, Lenaig
Cabon, Joelle
Castric, Jeanne
Cozien, Joelle
Thiery, Richard
Morin, Thierry
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Data: |
2017-10
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Ano: |
2017
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Palavras-chave: |
Infectious hematopoietic necrosis virus
Evolutionary dynamics
Dates of divergence
Phylogeography
Molecular epidemiology
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Resumo: |
Infectious hematopoietic necrosis virus (IHNV) is among the most important pathogens affecting the salmonid industry. Here, we investigated the molecular evolution and circulation of isolates from 11 countries or regions all over the world, with a special focus on the epidemiological situation in France. The phylogeography, time to the most recent common ancestor (TMRCA) and nucleotide substitution rate were studied using 118 full-length glycoprotein gene sequences isolated from 9 countries (5 genogroups) over a period of 47 years. The TMRCA dates back to 1943, with the L genogroup identified as the likely root (67 %), which is consistent with the first report of this pathogen in the USA. A Bayesian inference approach was applied to the partial glycoprotein gene sequences of 88 representative strains isolated in France over the period 1987–2015. The genetic diversity of these 88 sequences showed mean nucleotide and amino-acid identities of 97.1 and 97.8 %, respectively, and a d N/d S ratio (non-synonymous to synonymous mutations) of 0.25, indicating purifying selection. The French viral populations are divided into eight sub-clades and four individual isolates, with a clear spatial differentiation, suggesting the predominant role of local reservoirs in contamination. The atypical ‘signatures’ of some isolates underlined the usefulness of molecular phylogeny for epidemiological investigations that track the spread of IHNV.
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Tipo: |
Text
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Idioma: |
Inglês
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Identificador: |
http://archimer.ifremer.fr/doc/00399/51015/51832.pdf
DOI:10.1099/jgv.0.000894
http://archimer.ifremer.fr/doc/00399/51015/
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Editor: |
Microbiology Soc
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Formato: |
application/pdf
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Fonte: |
Journal Of General Virology (0022-1317) (Microbiology Soc), 2017-10 , Vol. 98 , N. 10 , P. 2438-2446
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Direitos: |
2017 The Authors | Published by the Microbiology Society
info:eu-repo/semantics/openAccess
restricted use
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