Fig. 1

Bayesian phylogenetic tree for the Blastocystis sequences obtained from children from Mexico using a fragment of the 18S rRNA gene. The values of the nodes indicate posterior probabilities using 10,000,000 generations. The GenBank accession numbers of the reference sequences are included; newly sequenced isolates are shown in different colours, ST1 is blue, ST2 is pink, ST3 is green and ST7 is red