Maximum likelihood tree of JEV strains from the ROK using complete E gene nucleotide sequence homologies. Phylogenetic analysis was performed using the MEGA5 program by the Tamura-Nei model of nucleotide substitution (ln(L) = -7791.2). Murray Valley encephalitis virus strain (MVE-1-51) was used as an outgroup. Bootstrap values at each major node were calculated using 2, 000 replicates. Scale bar represents the number of nucleotide substitutions per site.