Fig 3. Phylogenic tree based on the rrs, gltA, groEL and ompA genes of rickettsiae.

The genetic identity among different Rickettsia species was inferred by maximum-likelihood method implemented in PhyML v3.0, and rooted by midpoint method. The black dots indicate the nucleotide sequences of rrs (1,390 bp), gltA (1,200 bp), groEL (1,580 bp) and ompA (530 bp) gene segments from R. raoultii and “Ca. R. tarasevichiae” in the different sampling regions.