Fig. 2
From: US-like isolates of porcine epidemic diarrhea virus from Japanese outbreaks between 2013 and 2014
Phylogenetic analysis of the porcine epidemic diarrhea virus isolates based on the nucleotide sequences of the partials S genes. The tree was generated by the maximum likelihood method of the software MEGA v.6.05. Numbers at nodes represent the percentage of 1000 bootstrap replicates (values <70 are not shown). The scale bar indicates nucleotide substitution per site. The recent Japanese PEDV isolates in this study are marked by solid round symbols, the Japanese strains prior to 2013 are marked by solid diamond symbols, and the vaccine strains being used in Japan are marked by solid square symbols. The US strains and US-like strains are marked by triangle hollow symbols, while the S INDEL strains are marked by solid triangle symbols