Cryptic diversity in hymenolepidid tapeworms infecting humans

Parasitol Int. 2016 Apr;65(2):83-6. doi: 10.1016/j.parint.2015.10.009. Epub 2015 Oct 29.

Abstract

An adult hymenolepidid tapeworm was recovered from a 52-year-old Tibetan woman during a routine epidemiological survey for human taeniasis/cysticercosis in Sichuan, China. Phylogenetic analyses based on sequences of nuclear 28S ribosomal DNA and mitochondrial cytochrome c oxidase subunit 1 showed that the human isolate is distinct from Hymenolepis diminuta and Hymenolepis nana, the common parasites causing human hymenolepiasis. Proglottids of the human isolate were unfortunately unsuitable for morphological identification. However, the resultant phylogeny demonstrated the human isolate to be a sister species to Hymenolepis hibernia from Apodemus mice in Eurasia. The present data clearly indicate that hymenolepidid tapeworms causing human infections are not restricted to only H. diminuta and H. nana.

Keywords: Cryptic species complex; Hymenolepiasis; Hymenolepis diminuta.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • China
  • Female
  • Humans
  • Hymenolepiasis / parasitology*
  • Hymenolepis / classification*
  • Hymenolepis / genetics*
  • Hymenolepis / isolation & purification
  • Middle Aged
  • Ovum
  • Phylogeny