Figure 6. Phylogeny of CVB4 based on 475 nt of the VP1 gene generated by the neighbor-joining algorithm implemented in MEGA (version 5.0) using the Kimura two-parameter substitution model and 1000 bootstrap pseudo-replicates.
•Strains isolated in this investigation. ♦Strains isolated from Shandong. ○Strains isolated from other provinces of China.