Phylogenetic analysis of partial SSU rRNA sequences of Blastocystis isolates. Neighbor-Joining tree displaying the relationships of Blastocystis isolates, inferred by analysis of partial SSU rDNA sequence data using Kimura’s 2 parameter distance estimates. The number at each branch point represents the percentage of bootstrap support calculated from 1,000 trees. The sequences used for comparison were from Genbank. The triangle indicates isolates from this study.