ABSTRACT
In the spring of 2015, avian influenza virus surveillance in Western Siberia resulted in isolation of several influenza H5N1 virus strains. The strains were isolated from several wild bird species. Investigation of biological features of those strains demonstrated their high pathogenicity for mammals. Phylogenetic analysis of the HA gene showed that the strains belong to clade 2.3.2.1c.
Subject(s)
Influenza A Virus, H5N1 Subtype/classification , Influenza A Virus, H5N1 Subtype/pathogenicity , Influenza in Birds/virology , Animals , Animals, Wild/virology , Birds/virology , Genes, Viral , Hemagglutinin Glycoproteins, Influenza Virus/genetics , Humans , Influenza A Virus, H5N1 Subtype/genetics , Influenza, Human/virology , Phylogeny , SiberiaABSTRACT
The study provides the results of avian influenza virus surveillance in Central Asia during 2003-2009. We have analyzed 2604 samples from wild birds. These samples were collected in Kazakhstan (279), Mongolia (650), and Russia (1675). Isolated viruses from samples collected in Mongolia (13 isolates) and in Russia (4 isolates) were described. Virological analysis has shown that six isolates belong to the H3N6 subtype and five isolates belong to the H4N6 subtype. Two H1N1 influenza viruses, one H10N7 virus, two H3N8 viruses, and an H13N8 virus that is new for Central Asia have been also isolated. Samples were taken from birds of six orders, including several species preferring water and semiaquatic biotopes, one species preferring dry plain regions, and one more species that can inhabit both dry and water biotopes.
