Pseudanoplocephala crawfordi is a member of genus Hymenolepis based on phylogenetic analysis using ribosomal and mitochondrial DNA sequences

Abstract

Pseudanoplocephala crawfordi is one of the important zoonotic cestodes causing economic significance and public health concern. In the present study, the phylogenetic position of P. crawfordi isolated from pigs was re-inferred using molecular markers of internal transcribed spacer ribosomal DNA (ITS rDNA) and partial NADH dehydrogenase subunit 1 (pnad1) mitochondrial DNA. The lengths of ITS1, ITS2 rDNA and pnad1 were 757 bp, 628 bp and 458 bp, respectively. Sequence differences in the ITS1, ITS2 rDNA and pnad1 between P. crawfordi and Hymenolepis species were smaller than that between cestodes within genus Hymenolepis. Phylogenetic analyses based on three gene fragments showed that P. crawfordi was grouped into cluster of Hymenolepis species. These results suggested that P. crawfordi would be one member of genus Hymenolepis but not in a new genus Pseudanoplocephala.

• ITS rDNA
• mitochondrial DNA
• phylogenetic analyses
• Pseudanoplocephala crawfordi

Declaration of interest

This work was supported in parts by grants from Funds of Basic Research Key Program (ZD2012010) to GHZ, and Research Innovative Culture Foundation of Henan University of Science and Technology (2010CZ0012) to WCY.

The authors report no conflicts of interests. The authors alone are responsible for conducting the research and writing the paper.