Phylogenetic relationship of Enterocytozoon bieneusi groups, the relationship between E. bieneusi genotypes obtained in the present study and other known genotypes deposited in GenBank was inferred by a neighbor-joining analysis of ITS sequences based on genetic distance by the Kimura-2-parameter model. The numbers on the branches represent percent bootstrapping values from 1000 replicates, with more than 50% shown in the tree. Each sequence is identified by its accession number, genotype, and host. Genotypes obtained in this study are showed in bold.