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Spiroplasma Infection among Ixodid Ticks Exhibits Species Dependence and Suggests a Vertical Pattern of Transmission

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Title: Spiroplasma Infection among Ixodid Ticks Exhibits Species Dependence and Suggests a Vertical Pattern of Transmission
Authors: Ogata, Shohei Browse this author
Mohamed, Wessam Mohamed Ahmed Browse this author
Kusakisako, Kodai Browse this author →KAKEN DB
Thu, May June Browse this author
Qiu, Yongjin Browse this author →KAKEN DB
Moustafa, Mohamed Abdallah Mohamed Browse this author
Matsuno, Keita Browse this author →KAKEN DB
Katakura, Ken Browse this author →KAKEN DB
Nonaka, Nariaki Browse this author →KAKEN DB
Nakao, Ryo Browse this author →KAKEN DB
Keywords: Haemaphysalis
Issue Date: Feb-2021
Publisher: MDPI
Journal Title: Microorganisms
Volume: 9
Issue: 2
Start Page: 333
Publisher DOI: 10.3390/microorganisms9020333
Abstract: Members of the genus Spiroplasma are Gram-positive bacteria without cell walls. Some Spiroplasma species can cause disease in arthropods such as bees, whereas others provide their host with resistance to pathogens. Ticks also harbour Spiroplasma, but their role has not been elucidated yet. Here, the infection status and genetic diversity of Spiroplasma in ticks were investigated using samples collected from different geographic regions in Japan. A total of 712 ticks were tested for Spiroplasma infection by PCR targeting 16S rDNA, and Spiroplasma species were genetically characterized based on 16S rDNA, ITS, dnaA, and rpoB gene sequences. A total of 109 samples originating from eight tick species were positive for Spiroplasma infection, with infection rates ranging from 0% to 84% depending on the species. A linear mixed model indicated that tick species was the primary factor associated with Spiroplasma infection. Moreover, certain Spiroplasma alleles that are highly adapted to specific tick species may explain the high infection rates in Ixodes ovatus and Haemaphysalis kitaokai. A comparison of the alleles obtained suggests that horizontal transmission between tick species may not be a frequent event. These findings provide clues to understand the transmission cycle of Spiroplasma species in wild tick populations and their roles in host ticks.
Type: article
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)

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