• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Genetic diversity and transmission dynamics of viral pathogen causing child diarrhea in tropical region

Research Project

Project/Area Number 16H02772
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Hygiene and public health
Research InstitutionTohoku University

Principal Investigator

SAITO MAYUKO  東北大学, 医学系研究科, 准教授 (20598031)

Co-Investigator(Kenkyū-buntansha) 古瀬 祐気  京都大学, ウイルス・再生医科学研究所, 特定助教 (50740940)
齊藤 麻理子 (小畑麻理子)  東北大学, 医学系研究科, 助教 (80404234)
当广 謙太郎  東北大学, 医学系研究科, 助教 (70779355)
Research Collaborator Tandoc Amado, III  
Gilman Robert H.  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
Fiscal Year 2018: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2017: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2016: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
Keywordsノロウイルス / サポウイルス / ウイルス性下痢症 / 国際保健 / 感染症疫学 / 小児感染症 / 急性胃腸炎 / 医学 / 感染症 / 疫学 / ウイルス学 / ロタウイルス / コホート研究
Outline of Final Research Achievements

Norovirus is the virus most frequently detected in patients with viral diarrhea regardless of age group. In developing countries, it is estimated that norovirus diarrhea causes 200,000 death annually. However, the vaccine against norovirus infection has not been commercialized. In this study, we conducted a prospective cohort study of infants and their families in communities in the Philippines, and calculated the detection rate of norovirus in the asymptomatic period, diarrhea episodes and convalescent period, the infection rate among families, and analyzed genotype of viruses. In addition, epidemiological analyses were performed to calculate sapovirus infection rate up to two years of age, the positive prevalence during diarrhea episodes and asymptomatic periods, using archived samples in a cohort study, which was conducted in Peru.

Academic Significance and Societal Importance of the Research Achievements

ノロウイルスは、日本では食中毒の原因病原体として報告されることが多いが、家庭や施設内では、ヒトの排泄物に含まれたウイルスがさらにヒトへ感染することが感染予防の上で重要な課題である。乳幼児の便にノロウイルスが高率に検出されることは、近年低・中所得国でも報告されているが、無症候時や回復期も含めた報告は東南アジアでは初めてであり、これまでの家庭内での感染率についての報告は、小規模で限定的であった。本研究の成果は、ウイルスが宿主免疫を回避しながら進化するメカニズムの研究などに繋げることができる。また、近隣国における感染状況の把握は輸入感染症予防の面で意義があると考えている。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (10 results)

All 2018 2017 Other

All Int'l Joint Research (7 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (1 results)

  • [Int'l Joint Research] 熱帯医学研究所/ターラック州立病院(フィリピン)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ジョンズホプキンズ大学(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] カエタノ大学/A.B. PRISMA(ペルー)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] カエタノ大学/A.B. PRISMA(ペルー)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] 熱帯医学研究所(RITM)/ターラック州立病院(フィリピン)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] ジョンズ・ホプキンス大学/アメリカ食品医薬品局(FDA)(米国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] フィリピン熱帯医学研究所/Asian Foundation for Tropical Medicine(フィリピン)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Epidemiology of sapovirus infections in a birth cohort in Peru2017

    • Author(s)
      Gerardo J. Sanchez, Holger Mayta, Monica J. Pajuelo, Karen Neira, Liu Xiaofang, Lilia Cabrera, Sarah Blythe Ballard, Jean E. Crabtree, Dermot Kelleher, Vitaliano Cama, Caryn Bern, Hitoshi Oshitani, Robert H. Gilman, Mayuko Saito, for the Sapovirus Working Group.
    • Journal Title

      Clinical Infectious Diseases

      Volume: - Issue: 12 Pages: 1858-1863

    • DOI

      10.1093/cid/cix1103

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Complete Coding Genome Sequences of Uncommon GII.8 Sapovirus Strains Identified in Diarrhea Samples Collected from Peruvian Children.2017

    • Author(s)
      Emmanuel Kagning Tsinda, Rungnapa Malasao, Yuki Furuse, Robert H. Gilman, Xiaofang Liu, Sonia Apaza, Susan Espetia, Vitaliano Cama, Hitoshi Oshitani, Mayuko Saito, for the Sapovirus Working Group in Peru
    • Journal Title

      genome Announcements

      Volume: vol. 5 Issue: 43

    • DOI

      10.1128/genomea.01137-17

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ノロウイルスGIのポリメラーゼ領域とカプシド領域を含んだPCRの検出系の開発と検査特性の評価2018

    • Author(s)
      喜多浩士、当广謙太郎、Joseph Bonifacio、川村和久、野口光徳、阿部智美、岡本道子、Robert H. Gilman、斉藤繭子、押谷仁
    • Organizer
      日本細菌学会東北支部総会
    • Related Report
      2018 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2022-10-07  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi