Table 2

Substitutions at positions 148 and 151 in the neuraminidase of a subset of A(H3N2) viruses propagated on MDCK cells according to the standard procedure used in routine surveillance

Virus IDaVirus nameGISAID accession no.bFinal passage no.Substitution at residue:
148151
1A/Alaska/13/2011EPI4383101c
2A/American Samoa/7415/2011EPI4383181T/IdD/Ne
3A/American Samoa/7102/2011EPI4383141T/ID/G
4A/Vermont/17/2011EPI4383502T/I
5A/Texas/18/2011EPI4383382T/ID/G/N
6A/Arizona/07/2011EPI4383222T/ID/G
7A/Texas/24/2010EPI4383422
8A/Pennsylvania/03/2011EPI4383342
9A/Utah/09/2011EPI4383462T/ID/G
10A/New York/11/2011EPI4383302I
11A/Nebraska/12/2011EPI4383263I
12A/Mississippi/05/2011EPI4085783I
  • a The virus identifiers (IDs) correspond to those in Table 3 and in Tables S3 and S5 in the supplemental material.

  • b NA gene sequences of viruses in the clinical specimen.

  • c −, no changes observed (wild type).

  • d T/I, mixture of threonine and isoleucine at position 148.

  • e D/N, mixture of aspartic acid and asparagine at position 151.