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2016 Fiscal Year Annual Research Report

Practical study for control of bovine piroplasmosis in Sri Lanka

Research Project

Project/Area Number 26257417
Research InstitutionObihiro University of Agriculture and Veterinary Medicine

Principal Investigator

横山 直明  帯広畜産大学, 原虫病研究センター, 教授 (80301802)

Project Period (FY) 2014-04-01 – 2018-03-31
Keywordsピロプラズマ / バベシア / タイレリア / スリランカ / 治療薬 / ワクチン
Outline of Annual Research Achievements

平成28年度では、以下の研究成果を得た。
1)牛バベシア(Babesia ovata)の起原や疫学的分布について、総論としてとりまとめた。また、スリランカ、タイ、ベトナムに分布する牛バベシア(Babesia bovis)の遺伝子多型を明らかにした。さらに、スリランカ国の牛ピロプラズマ病(Babesia及びTheileria)発生の季節変動について明らかにした。
2)牛バベシア(Babesia divergens)の試験管内の薬剤スクリーニング系を確立し、また牛ピロプラズマ病(Babesia及びTheileria)に対する治療薬候補(Clofazimine、Dipyridamole)あるいは薬剤表的分子(Methionine aminopeptidase)を同定した。
3)牛バベシア(Babesia bovis)の試験管内の赤血球侵入評価系を確立し、さらに牛バベシア病に対するワクチン候補抗原(Profilin抗原、Methionine aminopeptidase抗原)を同定した。

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

スリランカ国を含めて世界の疫学調査を実施し、牛ピロプラズマの遺伝子多型や進化を明らかにできたこと、スリランカ国の牛ピロプラズマ病発生の季節動態を明らかにできたこと、牛ピロプラズマ病に対する治療薬やワクチンの候補を同定できたことから、スリランカ国で実装するための制圧戦略の学術基盤が構築できた。当初の計画以上に進展している。

Strategy for Future Research Activity

平成29年度では、牛ピロプラズマの媒介マダニの同定と、そのマダニの吸血活性に適したマダニ駆除プログラムを策定する。さらに、牛を用いた感染実験を実施し、ワクチン候補分子や治療薬候補の効果について予備的に検証し、スリランカ国で実装できる制圧戦略を取りまとめる。

  • Research Products

    (19 results)

All 2016 Other

All Int'l Joint Research (6 results) Journal Article (12 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 12 results) Presentation (1 results)

  • [Int'l Joint Research] 獣医学研究所(スリランカ)

    • Country Name
      SRI LANKA
    • Counterpart Institution
      獣医学研究所
  • [Int'l Joint Research] フエ大学/フエ農林大学(ベトナム)

    • Country Name
      VIET NAM
    • Counterpart Institution
      フエ大学/フエ農林大学
  • [Int'l Joint Research] 獣医学研究所(モンゴル)

    • Country Name
      MONGOLIA
    • Counterpart Institution
      獣医学研究所
  • [Int'l Joint Research] サダト市立大学(エジプト)

    • Country Name
      EGYPT
    • Counterpart Institution
      サダト市立大学
  • [Int'l Joint Research] ナイロビ大学(ケニア)

    • Country Name
      KENYA
    • Counterpart Institution
      ナイロビ大学
  • [Int'l Joint Research]

    • # of Other Countries
      1
  • [Journal Article] Babesia ovata : Taxonomy, phylogeny and epidemiology2016

    • Author(s)
      Sivakumar Thillaiampalam、Igarashi Ikuo、Yokoyama Naoaki
    • Journal Title

      Veterinary Parasitology

      Volume: 229 Pages: 99~106

    • DOI

      10.1016/j.vetpar.2016.10.006

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Epidemiology of bovine hemoprotozoa parasites in cattle and water buffalo in Vietnam.2016

    • Author(s)
      Weerasooriya G, Sivakumar T, Lan DT, Long PT, Takemae H, Igarashi I, Inoue N, Yokoyama N.
    • Journal Title

      J Vet Med Sci.

      Volume: 78 Pages: 1361~1367

    • DOI

      10.1292/jvms.16-0099

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Large-scale drug screening against Babesia divergens parasite using a fluorescence-based high-throughput screening assay2016

    • Author(s)
      Rizk Mohamed Abdo、El-Sayed Shimaa Abd El-Salam、AbouLaila Mahmoud、Tuvshintulga Bumduuren、Yokoyama Naoaki、Igarashi Ikuo
    • Journal Title

      Veterinary Parasitology

      Volume: 227 Pages: 93~97

    • DOI

      10.1016/j.vetpar.2016.07.032

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Recombinant methionine aminopeptidase protein of Babesia microti: immunobiochemical characterization as a vaccine candidate against human babesiosis2016

    • Author(s)
      Munkhjargal Tserendorj、Yokoyama Naoaki、Igarashi Ikuo
    • Journal Title

      Parasitology Research

      Volume: 115 Pages: 3669~3676

    • DOI

      10.1007/s00436-016-5172-5

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Genetic diversity and antigenicity variation of Babesia bovis merozoite surface antigen-1 (MSA-1) in Thailand2016

    • Author(s)
      Tattiyapong Muncharee、Sivakumar Thillaiampalam、Takemae Hitoshi、Simking Pacharathon、Jittapalapong Sathaporn、Igarashi Ikuo、Yokoyama Naoaki
    • Journal Title

      Infection, Genetics and Evolution

      Volume: 41 Pages: 255~261

    • DOI

      10.1016/j.meegid.2016.04.021

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecular and biochemical characterization of methionine aminopeptidase of Babesia bovis as a potent drug target2016

    • Author(s)
      Munkhjargal Tserendorj、Ishizaki Takahiro、Guswanto Azirwan、Takemae Hitoshi、Yokoyama Naoaki、Igarashi Ikuo
    • Journal Title

      Veterinary Parasitology

      Volume: 221 Pages: 14~23

    • DOI

      10.1016/j.vetpar.2016.02.024

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Identification and characterization of profilin antigen among Babesia species as a common vaccine candidate against babesiosis2016

    • Author(s)
      Munkhjargal Tserendorj、Aboge Gabriel Oluga、Ueno Akio、Aboulaila Mahmoud、Yokoyama Naoaki、Igarashi Ikuo
    • Journal Title

      Experimental Parasitology

      Volume: 166 Pages: 29~36

    • DOI

      10.1016/j.exppara.2016.03.024

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] RBC invasion and invasion-inhibition assays using free merozoites isolated after cold treatment of Babesia bovis in?vitro culture2016

    • Author(s)
      Ishizaki Takahiro、Sivakumar Thillaiampalam、Hayashida Kyoko、Tuvshintulga Bumduuren、Igarashi Ikuo、Yokoyama Naoaki
    • Journal Title

      Experimental Parasitology

      Volume: 166 Pages: 10~15

    • DOI

      10.1016/j.exppara.2016.03.010

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Clofazimine Inhibits the Growth of Babesia and Theileria ParasitesIn VitroandIn Vivo2016

    • Author(s)
      Tuvshintulga Bumduuren、AbouLaila Mahmoud、Davaasuren Batdorj、Ishiyama Aki、Sivakumar Thillaiampalam、Yokoyama Naoaki、Iwatsuki Masato、Otoguro Kazuhiko、?mura Satoshi、Igarashi Ikuo
    • Journal Title

      Antimicrobial Agents and Chemotherapy

      Volume: 60 Pages: 2739~2746

    • DOI

      10.1128/AAC.01614-15

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Type-specific PCR assays for Babesia bovis msa - 1 genotypes in Asia: Revisiting the genetic diversity in Sri Lanka, Mongolia, and Vietnam2016

    • Author(s)
      Liyanagunawardena Nilukshi、Sivakumar Thillaiampalam、Kothalawala Hemal、Silva Seekkuge Susil Priyantha、Battsetseg Badgar、Lan Dinh Thi Bich、Inoue Noboru、Igarashi Ikuo、Yokoyama Naoaki
    • Journal Title

      Infection, Genetics and Evolution

      Volume: 37 Pages: 64~69

    • DOI

      10.1016/j.meegid.2015.10.029

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A longitudinal study of Babesia and Theileria infections in cattle in Sri Lanka2016

    • Author(s)
      Sivakumar Thillaiampalam、Kothalawala Hemal、Weerasooriya Gayani、Silva Seekkuge Susil Priyantha、Puvanendiran Sumathy、Munkhjargal Tserendorj、Igarashi Ikuo、Yokoyama Naoaki
    • Journal Title

      Veterinary Parasitology: Regional Studies and Reports

      Volume: 6 Pages: 20~27

    • DOI

      10.1016/j.vprsr.2016.11.009

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of inhibitory effects of dipyridamole against bovine and equine piroplasmosis.2016

    • Author(s)
      Tuvshintulga, B., Sivakumar, T., Yokoyama, N., and Igarashi, I.
    • Journal Title

      J. Protozool. Res.

      Volume: 26 Pages: 40-46

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] スリランカ国の牛におけるバベシア及びタイレリアの分子疫学調査2016

    • Author(s)
      Sivakumar Thillaiampalam、五十嵐郁男、横山直明
    • Organizer
      第57回日本熱帯医学会大会

URL: 

Published: 2018-12-17  

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