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Molecular detection of apicomplexan protozoa in Hokkaido brown bears (Ursus arctos yesoensis) and Japanese black bears (Ursus thibetanus japonicus)

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Title: Molecular detection of apicomplexan protozoa in Hokkaido brown bears (Ursus arctos yesoensis) and Japanese black bears (Ursus thibetanus japonicus)
Authors: Mohamed Abdallah Mohamed, Moustafa Browse this author
Ayaka, Sasaki Browse this author
Michito, Shimozuru Browse this author
Nakao, Ryo Browse this author
Sashika, Mariko Browse this author
Yamazaki, Koji Browse this author
Koike, Shinsuke Browse this author
Tanaka, Junpei Browse this author
Tamatani, Hiroo Browse this author
Yamanaka, Masami Browse this author
Ishinazaka, Tsuyoshi Browse this author
Tsubota, Toshio Browse this author →KAKEN DB
Keywords: Bears
Apicomplexan protozoa
Babesia microti
Issue Date: 1-Nov-2020
Publisher: Springer
Journal Title: Parasitology Research
Volume: 119
Issue: 11
Start Page: 3739
End Page: 3753
Publisher DOI: 10.1007/s00436-020-06873-3
Abstract: Many tick-borne pathogens (TBPs) are present in wildlife. The objective of this study is to reveal the role of wild bears in maintaining TBPs. A total of 49 brown bears (Ursus arctos yesoensis) from Hokkaido, and 18 Japanese black bears (Ursus thibetanus japonicus) from Tochigi, and 66 Japanese black bears from Nagano were examined by two molecular methods, reverse line blot (RLB) hybridization, and nested PCR. A total of 5 TBPs (Hepatozoon ursi,Babesiasp. UR2-like group,Cytauxzoonsp. UR1,Babesiasp. UR1, andBabesia microti) were detected from bear blood DNA samples.B. microtiwas detected from blood DNA samples of Japanese black bear for the first time, with the prevalence of 6.0% (5/84). Out of detected pathogens,H. ursi,Babesiasp. UR2-like pathogens, andCytauxzoonsp. UR1 were considered as three of the most prevalent TBPs in bears. The prevalence ofH. ursiwere significantly higher in Japanese black bear (0% vs 96.4%) while that ofBabesiasp. UR2-like group was higher in Hokkaido brown bears (89.8% vs 40.5%). The prevalence ofBabesiasp. UR1 were significantly higher in Japanese black bears from Tochigi (44.4%), comparing with those from Nagano (18.2%). The prevalence of the detected TBPs were significantly higher in adult bears, comparing with those in younger bears. The present study suggests that Japanese bear species contribute in the transmission of several TBPs in Japan. The expanding distribution of bears might cause the accidental transmission of TBPs to humans and domestic animals.
Rights: This is a post-peer-review, pre-copyedit version of an article published in Parasitology Research. The final authenticated version is available online at:
Type: article (author version)
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 坪田 敏男

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