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Infect Genet Evol. 2017 Nov 2. pii: S1567-1348(17)30380-5. doi: 10.1016/j.meegid.2017.10.027. [Epub ahead of print]
A two-year monitoring period of the genetic properties of clade 2.3.2.1c H5N1 viruses in Nigeria reveals the emergence and co-circulation of distinct genotypes.
Laleye A1, Joannis T2, Shittu I2, Meseko C2, Zamperin G3, Milani A3, Zecchin B3, Fusaro A3, Monne I3, Abolnik C4.
Author information
Abstract
Phylogenetic analyses of the complete genomes of the highly pathogenic avian influenza (HPAI) 2.3.2.1c H5N1 virus strains causing outbreaks in Nigeria's poultry population from 2014 to 2016 showed evidence of distinct co-circulating genotypes and the emergence of reassortant viruses. One of these reassortants became the predominant strain by 2016, and the NA protein of this strain possessed the V96A substitution known to confer reduced susceptibility to neuraminidase inhibiting antiviral drugs. Our findings also demonstrated evolutionary relationships between Nigerian isolates and European and Middle Eastern strains of H5N1 which provides further evidence for the proposed role of migratory birds in spreading the virus, although the involvement of the live poultry trade cannot be excluded. Efforts must be directed towards improving biosecurity and gaining the cooperation of poultry farmers for more effective control of HPAI, in order to mitigate the emergence of HPAI strains in Nigeria with biological properties that are potentially even more dangerous to animals and humans.
Copyright ? 2017. Published by Elsevier B.V.
KEYWORDS:
Co-circulation; Evolution; Full-genome sequencing; HPAI; Mutation; Reassortment
PMID: 29104094 DOI: 10.1016/j.meegid.2017.10.027
A two-year monitoring period of the genetic properties of clade 2.3.2.1c H5N1 viruses in Nigeria reveals the emergence and co-circulation of distinct genotypes.
Laleye A1, Joannis T2, Shittu I2, Meseko C2, Zamperin G3, Milani A3, Zecchin B3, Fusaro A3, Monne I3, Abolnik C4.
Author information
Abstract
Phylogenetic analyses of the complete genomes of the highly pathogenic avian influenza (HPAI) 2.3.2.1c H5N1 virus strains causing outbreaks in Nigeria's poultry population from 2014 to 2016 showed evidence of distinct co-circulating genotypes and the emergence of reassortant viruses. One of these reassortants became the predominant strain by 2016, and the NA protein of this strain possessed the V96A substitution known to confer reduced susceptibility to neuraminidase inhibiting antiviral drugs. Our findings also demonstrated evolutionary relationships between Nigerian isolates and European and Middle Eastern strains of H5N1 which provides further evidence for the proposed role of migratory birds in spreading the virus, although the involvement of the live poultry trade cannot be excluded. Efforts must be directed towards improving biosecurity and gaining the cooperation of poultry farmers for more effective control of HPAI, in order to mitigate the emergence of HPAI strains in Nigeria with biological properties that are potentially even more dangerous to animals and humans.
Copyright ? 2017. Published by Elsevier B.V.
KEYWORDS:
Co-circulation; Evolution; Full-genome sequencing; HPAI; Mutation; Reassortment
PMID: 29104094 DOI: 10.1016/j.meegid.2017.10.027