Abstract

An avian influenza virus strain, A/domestic green-winged teal/Hunan/2036/2007(H3N6) (DGW-T2036), was isolated from healthy domestic green-winged teals (Anas crecca) in Hunan Province, South China. All eight gene segments of the isolate were sequenced. Genomic analysis demonstrated that this H3N6 virus is a novel reassortant avian influenza virus with a gene constellation originating from multiple ancestors.

Highlights

  • An avian influenza virus strain, A/domestic green-winged teal/Hunan/2036/2007(H3N6) (DGW-T2036), was isolated from healthy domestic green-winged teals (Anas crecca) in Hunan Province, South China

  • These results suggested that domestic green-winged teals, a type of wild duck bred for meat, may play an important role in transmitting avian influenza virus

  • Nucleotide homology comparisons revealed that the HA gene sequence of the DGW-T2306 virus is highly similar to that of A/duck/Beijing/40/04(H3N8), sharing 98% nucleotide identity, while its NA gene sequence is highly similar to that of A/duck/ Eastern China/01/2007(H4N6)

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Summary

Introduction

An avian influenza virus strain, A/domestic green-winged teal/Hunan/2036/2007(H3N6) (DGW-T2036), was isolated from healthy domestic green-winged teals (Anas crecca) in Hunan Province, South China. Known as bird flu, is a member of the family Orthomyxoviridae and is classified into 16 hemagglutinin (HA) and 9 neuraminidase (NA) subtypes [1]. It is well known that wild ducks are the major natural reservoir for lowpathogenicity avian influenza (LPAI) viruses and have a higher prevalence of influenza A virus than other species [2].

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