[Isolation of influenza A virus from wild birds in western part of Mongolia].

Aim: To study circulation of influenza A viruses in western part of Mongolia.

Materials And Methods: Isolation and characterization of influenza viruses was performed according to recommendations of WHO.

Results: Circulation of influenza A viruses subtypes H3N6, H4N6, H1N1, H13N8 in different wild bird species in western part of Mongolia was documented.

Genetic and biological characterization of avian influenza H5N1 viruses isolated from wild birds and poultry in Western Siberia.

Three viruses included in the study were isolated from dead birds (A/duck/Omsk/1822/2006, A/chicken/Reshoty/02/2006, and A/duck/Tuva/01/2006), whereas the virus A/common gull/Chany/P/2006 was isolated from an apparently healthy gull during outbreaks of highly pathogenic avian influenza in Russia in 2006. The intravenous pathogenicity index (IVPI) of viruses A/duck/Omsk/1822/2006, A/chicken/Reshoty/02/2006, and A/duck/Tuva/01/2006 ranged from 2.7 to 3.

[Characteristic of high pathogenic avian influenza virus subtype H5N1 isolated from common gull (Larus canus)].

Aim: To study biological characteristics of H5N1 influenza virus isolated from common gull on south of West Siberia in 2006.

Materials And Methods: Isolation and characterization of biological characteristics performed according to recommendations of World Health Organization.

Results: Influenza virus A (H5N1) was first isolated from common gull (Larus canus) in Russia.

[Isolation and molecular characterization of the influenza virus A/H5N1 strains isolated during outbreak of avian influenza among birds in the European part of Russia in 2005: strain with ozeltamivir-resistance mutation was found].

Isolation and characterization of the influenza virus A/H5N1 strains, isolated from chicken in the Yandovka village (Tula Region) and from wild swan near the orifice of the Volga River that died during an outbreak of avian flu in autumn 2005, were carried out. Genetic and phylogenetic analyses were performed. The goals of the analysis were to determine possible geographical origin of the strain, genetic similarity of isolated strains to earlier sequenced isolates, epidemic potential, existence of pathogenicity markers, and resistance to antiviral drugs.

[Surveillance for avian influenza virus in synanthropic birds during epizootic and postepizootic periods on the south of west Siberia].

Results of virologic examination of synanthropic birds procured on the south part of West Siberia during epizootic in autumn 2005 and during postepizootic period (winter 2005-2006) are presented. During epizootic period one strain belonging to H4 subtype of hemagglutinin, which was not highly pathogenic, was isolated from a magpie. During postepizootic period influenza A viruses in synanthropic species were not found.