[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]
Viruses. 2020 Jan 13;12(1). pii: E88. doi: 10.3390/v12010088.
Detection of a Reassortant H9N2 Avian Influenza Virus with Intercontinental Gene Segments in a Resident Australian Chestnut Teal.
Bhatta TR1,2, Chamings A1,2, Vibin J1,2, Klaassen M1,3, Alexandersen S1,2,4.
Author information: 1 Geelong Centre for Emerging Infectious Diseases, Geelong, Victoria 3220, Australia. 2 School of Medicine, Deakin University, Geelong, Victoria 3220, Australia. 3 Centre for Integrative Ecology, Deakin University, Victoria 3220, Australia. 4 Barwon Health, University Hospital Geelong, Geelong, Victoria 3220, Australia.
The present study reports the genetic characterization of a low-pathogenicity H9N2 avian influenza virus, initially from a pool and subsequently from individual faecal samples collected from Chestnut teals (Anas castanea) in southeastern Australia. Phylogenetic analyses of six full gene segments and two partial gene segments obtained from next-generation sequencing showed that this avian influenza virus, A/Chestnut teal/Australia/CT08.18/12952/2018 (H9N2), was a typical, low-pathogenicity, Eurasian aquatic bird lineage H9N2 virus, albeit containing the North American lineage nucleoprotein (NP) gene segment detected previously in Australian wild birds. This is the first report of a H9N2 avian influenza virus in resident wild birds in Australia, and although not in itself a cause of concern, is a clear indication of spillover and likely reassortment of influenza viruses between migratory and resident birds, and an indication that any lineage could potentially be introduced in this way.
KEYWORDS: Chestnut teal; Eurasian lineage; H9N2; avian influenza virus; low pathogenicity; phylogenetic analysis; reassortant
PMID: 31940999 DOI: 10.3390/v12010088
Keywords: Avian Influenza; H9N2; Wild Birds; Reassortant strain; Australia.