Phylogenetic trees based on the partial sequences of 18S ribosomal RNA gene of five Plasmodium from malaria patients in China-Myanmar endemic areas from Yunnan province, January 2008 to August 2012. Phylogenetic analysis produced by the neighbor-joining method using MEGA version 5.1 software. Partial sequences of 18S ribosomal RNA of our case study samples are denoted as Pv1, Pv2, Pm1, Pm2, Pk1, Pk2, Pf1, Pf2,Pf3, Po1, and Po2 in bold face with other Plasmodium species. Scale bar indicates nucleotide substitutions per site.