Fig. 3From: Characterization of rickettsiae in ticks in northeastern ChinaPhylogenetic tree based on partial sequences of ompA (533 bp) gene. Sequences of the Rickettsia species detected in the present study were aligned with those retrieved from the GenBank database. Phylogenetic analysis was performed using the Maximum Likelihood method and trees were tested by bootstrapping (1000 pseudoreplicates); Rickettsia felis was used as the outgroup. The scale-bar indicates the number of substitutions (Kimura 2-parameter model) per site. Sequences for species detected in the present study are indicated by geometric shapes and coloursBack to article page