Fig 1.
Epidemic curve of influenza virus-positive cases.
Monthly distribution of total ILI cases and influenza A and B virus-positive cases in Mongolia from September 2013 to September 2017.
Fig 2.
Weekly distribution of influenza B viruses between 2013 and 2017 in Mongolia.
Fig 3.
Phylogenetic tree based on HA amino acid sequences of B/Victoria lineage viruses circulated in Mongolia from 2012 to 2017.
The phylogenetic tree was created by the neighbor-joining method (1000 bootstrap replicates). Blue is for Mongolian strains, red is for vaccine strains, and black is for reference strains.
Fig 4.
Phylogenetic tree based on HA amino acid sequences of B/Yamagata lineage viruses circulated in Mongolia from 2012 to 2016.
The phylogenetic tree was created by the neighbor-joining method (1000 bootstrap replicates). Mongolian strains (blue), vaccine strains (red), reference strains (black).
Table 1.
Amino acid substitutions of HA protein from influenza B clinical isolates detected in Mongolia during 2013–2016.
Table 2.
Antigenic relationship between B/Victoria isolates and B/Brisbane/60/2008 and amino acid substitutions on HA1 gene, refer to B/Brisbane/60/2008 strain.
Table 3.
Antigenic relationships between B/Yamagata isolates and B/Wisconsin/01/2010, B/Massachusetts/02/2012 and B/Phuket/3073/2013 and amino acid substitutions on HA1 gene, refer to B/Wisconsin/01/2010 strain.
Table 4.
Result of fluorescence-based NA inhibition assay.
Fig 5.
The compared result of drug resistant strains, NA protein sequences with clinical specimens and strain B/Kochi/61/2011.