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. 2008 Jul;14(7):e1. doi: 10.3201/eid1407.071681

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This is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

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Neighbor-joining tree of 158 H5N1 isolates constructed by using PAUP* version 4.0b10 (9). Estimates of the phylogenies were calculated by performing 1,000 neighbor-joining bootstrap replicates. Distinct amino acid residues shared only by isolates within a particular clade are shown on the line above the clade-defining node when present. Amino acid substitutions represent change relative to Gs/GD/1/96. The small tree was rooted at the clade 0 node for larger scaling. Scale bar represents 0.01-nt changes. Ck, chicken; Gs, goose; Dk, duck; Ph, pheasant; CPH, Chinese pond heron; Ty, turkey; Gf, Guinea fowl; MDk, migratory duck; BHGs, bar-headed goose; WDk, wild duck; Qa, quail; Pg, pigeon.