Phylogenetic tree for E. canis based on partial dsb gene sequences. Phylogenetic tree based on partial dsb gene sequences of E. canis was constructed by employing the neighbor-joining method with Kimura two-parameter analysis and bootstrap analysis of 1000 replicates. The numbers on the branches indicate the percentage of replicates that reproduced the topology for each clads. The red rhombi indicate the sequences acquired from the current study (Drosophila melanogaster was used as an outgroup).