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. 2014 Aug;88(16):8981–8997. doi: 10.1128/JVI.00907-14

TABLE 1.

The six highly pathogenic avian influenza H5N1 viruses analyzed in this studya

Virus strain Abbreviation Clinical outcome of patient HA clade Receptor-binding specificityb
PB1-F2 PB2
NS1
α2,3 α2,6 66 591 627 701 92 C terminus
A/Vietnam/UT3028II/2004 clone3 VN3028IIcl3 Died 1 ++++ ++++ N Q K D D ESEV
A/Vietnam/UT30259/2004 VN30259 Died 1 ++++ ++ N Q K D D ESEV
A/Vietnam/UT3040/2004 VN3040 Died 1 ++++ N Q K D D 10-aa deletion
A/Vietnam/UT3062/2004 VN3062 Died 1 ++++ N Q K D D ESEV
A/Vietnam/30408/2005 clone7 VN30408cl7 Recovered 1 ++++ +++ N Q K D D ESEV
A/Vietnam/UT30850/2005 VN30850 Died 2.3.4 ++++ N Q K D D ESEV
a

For PB1-F2, PB2, and NS1, the amino acid at the position(s) indicated in the subheadings is specified.

b

The level of receptor-binding affinity is indicated using a “+/−” scale, where “−” indicates no receptor binding affinity, “+” indicates affinity, and the number of “+” symbols indicates the intensity of the receptor-binding affinity (21).