Differential diagnosis and molecular characterization of Hymenolepis nana and Hymenolepis diminuta (Cestoda: Cyclophyllidea: Hymenolepididae) based on nuclear rDNA ITS2 gene marker

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• 作者：Sunil Sharma ; Damanbha Lyngdoh ; Bishnupada Roy ; Veena Tandon
• 关键词：Hymenolepis nana ; Hymenolepis diminuta ; Hymenolepiasis ; rDNA ITS2 ; Cestodes
• 刊名：Parasitology Research
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：115
• 期：11
• 页码：4293-4298
• 全文大小：652 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Medical Microbiology
  Microbiology
  Immunology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1955
• 卷排序：115

文摘

Given the widespread distribution and medical implication of members of the genus Hymenolepis, specific identification of the aetiological agent becomes imperative. For precise diagnosis of the species, molecular techniques such as PCR and RFLP of the nuclear ribosomal internal transcribed spacer 2 (rDNA-ITS2) gene marker were carried out. The results showed distinct restriction patterns for both Hymenolepis nana and Hymenolepis diminuta when digested with either of the enzymes RsaI, HaeIII or HhaI. The annotated rDNA-ITS2 sequences from the two species revealed differences in the length; the folded secondary structure also depicted clear demarcation between the two species with variations in length of the helices, pyrimidine-pyrimidine mismatches and sites where motifs occur. In phylogenetic analysis of the evolutionary relationship between the two species as well as with other members of the family Hymenolepididae, the species causing human hymenolepiasis were found to be distantly related as they diverged independently from the ancestral lineage.