Cryptic diversity in hymenolepidid tapeworms infecting humans |
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| Institution: | 1. Department of Parasitology, Asahikawa Medical University, Asahikawa, Japan;2. Finnish Museum of Natural History Luomus, University of Helsinki, Helsinki, Finland;3. Institute of Parasitic Diseases, Sichuan Center for Disease Control and Prevention, Chengdu, China;4. Department of Bacteriology and Immunology/Immunobiology Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland;5. Natural Resources Institute Finland (Luke), Vantaa, Finland;1. Molecular and Cell Biology Research Center, Department of Parasitology and Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran;2. Museum of Southwestern Biology Division of Parasites, Department of Biology, University of New Mexico, Albuquerque, USA;3. Cellular and Molecular Research Center, Department of Microbiology, Birjand University of Medical Sciences, Birjand, Iran;1. Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovakia;2. Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic;1. One Health Center for Zoonoses and Tropical Veterinary Medicine, Ross University School of Veterinary Medicine, P.O. Box 334, Basseterre, St.Kitts and Nevis;2. Behavioural Science Foundation, Estridge Estate, St.Kitts and Nevis;3. Ngee Ann Polytechnic, School of Life Sciences and Chemical Technology, 535 Clementi Rd, S599489, Singapore |
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| 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. |
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