The phylogenetic relationships of G. duodenalis isolates were obtained by neighbor-joining analysis. Bootstrap values > 50% from 1,000 replicates are shown as nodes. The black circles represent the sequences obtained in this study. A. Phylogenetic relationships based on SSU rRNA nucleotide sequences; B. Phylogenetic relationships based on bg nucleotide sequences; C. Phylogenetic relationships based on gdh nucleotide sequences; D. Phylogenetic relationships based on tpi nucleotide sequences.