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Fig. 1 | Virology Journal

Fig. 1

From: Efficacy of an inactivated bivalent vaccine against the prevalent strains of Newcastle disease and H9N2 avian influenza

Fig. 1

Phylogenetic tree of F genes of NDV (a) and HA genes of H9N2 influenza viruses (b). Unrooted phylogenetic trees were generated using the distance-based neighbor-joining method and MEGA 5.1 software. Statistical support for tree branches was assessed by bootstrap analysis using 1000 replications; numbers above branches indicate neighbor-joining bootstrap values that were ≥ 70%; the tree is drawn to scale, with branch lengths measured in the number of substitutions per site. Analysis was based on nucleotides of the F genes of NDV and HA genes of H9N2. The arrow indicates vaccine candidates, black triangles indicate the NDV viruses used for challenge, black circles indicate the H9 viruses used for challenge

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Virology Journal

ISSN: 1743-422X