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Dynamics of Pneumococcal carriage and emergence of high virulence clone after introduction of vaccine in Japan

Research Project

Project/Area Number 25460835
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Hygiene and public health
Research InstitutionOsaka Prefectural Institute of Public Health

Principal Investigator

Kawahara Ryuji  大阪府立公衆衛生研究所, その他部局等, 主任研究員 (10332454)

Co-Investigator(Kenkyū-buntansha) TAKEUCHI Hajime  佛教大学, 社会福祉学部, 教授 (30552806)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords肺炎球菌 / ワクチン / 保菌 / 侵襲性感染症 / 侵襲性肺炎球菌感染症 / 薬剤耐性 / 遺伝子型 / IPD / 病原因子
Outline of Final Research Achievements

We investigated the impact of pneumococcal vaccine on carriage of Streptococcus pneumoniae and emergence of a high virulent clone in Japan. While the carriage rate didn't change than previous studies, the rate of vaccine-serotypes and non-vaccine-serotypes decreased and increase respectively. Furthermore, the result showed relatedness of serotype 15A, most frequently isolated in the study, between carriage and invative pneumococcal disease strains. Since most of the 15A strains were identical with Sweden15A-25, it is suggested that the 15A clone might be epidemic clone in the near future.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (5 results)

All 2016 2015 2014 2013

All Journal Article (2 results) (of which Open Access: 1 results,  Peer Reviewed: 1 results) Presentation (3 results)

  • [Journal Article] 2013年度の侵襲性肺炎球菌感染症の患者発生動向と成人患者由来の原因菌の血清型分布2014

    • Author(s)
      河原隆二, 青柳哲史, 高橋弘毅, 武田博明, 田邊嘉也, 笠原 敬, 西順一郎, 藤田次郎, 丸山貴也, 山崎一美, 横山彰仁, 渡邊浩, 牧野友彦, 高橋琢理, 大日康史, 松井珠乃, 砂川富正, 石岡大成, 奥野英雄, 佐藤 弘, 新井 智, 木村博一, 多屋馨子, 大石和徳, 常 彬, 大西 真, 金城雄樹
    • Journal Title

      病原微生物検出情報

      Volume: 35 Pages: 179-181

    • Related Report
      2014 Research-status Report
    • Open Access
  • [Journal Article] 上咽頭培養で分離されるインフルエンザ菌および肺炎球菌の保菌状況の保育園入園1年間での変化―ワクチン接種との関連性―2013

    • Author(s)
      武内一, 河原隆二, 田中充, 嶋田聡, 中川元, 高雄礼
    • Journal Title

      外来小児科

      Volume: 16 Pages: 140-147

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 大阪における健康保育園児の保菌由来肺炎球菌と侵襲性感染症由来肺炎球菌との関連性について2016

    • Author(s)
      河原隆二, 森裕一, 井澤恭子, 浜端朋子, 勝川千尋, 武内一
    • Organizer
      第89回日本細菌学会総会
    • Place of Presentation
      大阪市
    • Year and Date
      2016-03-23
    • Related Report
      2015 Annual Research Report
  • [Presentation] 保育園0歳児の入園後1年間におけるHib及び肺炎球菌保菌に関する前方視調査2015

    • Author(s)
      武内一, 河原隆二, 森裕一
    • Organizer
      第25回日本外来小児科学会年次集会
    • Place of Presentation
      仙台市
    • Year and Date
      2015-08-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] 大阪府における侵襲性肺炎球菌感染症の調査について2014

    • Author(s)
      河原隆二, 勝川千尋, 松井陽子, 福村和美, 大平文人, 久米田裕子
    • Organizer
      衛生微生物技術協議会総会
    • Place of Presentation
      東京
    • Year and Date
      2014-06-26
    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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