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Proposal for a Global Classification and Nomenclature System for A/H9 Influenza Viruses
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Proposal for a Global Classification and Nomenclature System for A/H9 Influenza Viruses
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Proposal for a Global Classification and Nomenclature System for A/H9 Influenza Viruses
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Journal Article
Proposal for a Global Classification and Nomenclature System for A/H9 Influenza Viruses
2024
Overview
Influenza A/H9 viruses circulate worldwide in wild and domestic avian species, continuing to evolve and posing a zoonotic risk. A substantial increase in human infections with A/H9N2 subtype avian influenza viruses (AIVs) and the emergence of novel reassortants carrying A/H9N2-origin internal genes has occurred in recent years. Different names have been used to describe the circulating and emerging A/H9 lineages. To address this issue, an international group of experts from animal and public health laboratories, endorsed by the WOAH/FAO Network of Expertise on Animal Influenza, has created a practical lineage classification and nomenclature system based on the analysis of 10,638 hemagglutinin sequences from A/H9 AIVs sampled worldwide. This system incorporates phylogenetic relationships and epidemiologic characteristics designed to trace emerging and circulating lineages and clades. To aid in lineage and clade assignment, an online tool has been created. This proposed classification enables rapid comprehension of the global spread and evolution of A/H9 AIVs.
Publisher
Centers for Disease Control and Prevention
Subject
/ Animals
/ Datasets
/ Hemagglutinin Glycoproteins, Influenza Virus - genetics
/ Humans
/ Influenza A Virus, H9N2 Subtype - classification
/ Influenza A Virus, H9N2 Subtype - genetics
/ Influenza in Birds - epidemiology
/ Influenza in Birds - virology
/ Influenza, Human - epidemiology
/ Mutation
/ Names
/ Poultry
/ Software
/ Viruses
