Abstract
Sequences of mitochondrial cytochrome c oxidase subunit 1 (CO1) gene, nuclear internal transcribed spacer 2 (ITS2) region of ribosomal DNA (rDNA), and 5S rDNA of Enterobius vermicularis from captive chimpanzees in five zoos/institutions in Japan were analyzed and compared with those of pinworm eggs from humans in Japan. Three major types of variants appearing in both CO1 and ITS2 sequences, but showing no apparent connection, were observed among materials collected from the chimpanzees. Each one of them was also observed in pinworms in humans. Sequences of 5S rDNA were identical in the materials from chimpanzees and humans. Phylogenetic analysis of CO1 gene revealed three clusters with high bootstrap value, suggesting considerable divergence, presumably correlated with human evolution, has occurred in the human pinworms. The synonymy of E. gregorii with E. vermicularis is supported by the molecular evidence.
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