川口谷 充代

写真a

所属

医学部 衛生学講座

職名

講師

ホームページ

https://nrid.nii.ac.jp/ja/nrid/1000070733062/

学歴 【 表示 / 非表示

  •  
    -
    2014年

    札幌医科大学大学院 医学研究科 地域医療人間総合医学専攻 環境保健予防医学 博士課程 修了   Graduate School of Medicine  

  •  
    -
    2011年

    札幌医科大学大学院 医学研究科 医科学専攻 修士課程 修了   Graduate School of Medicine  

  •  
    -
    2009年

    天使大学 看護栄養学部 栄養学科 卒業   School of Nursing and Nutrition  

  •  
    -
    1997年

    北海道教育大学 教育学部 札幌分校 卒業   Faculty of Education  

学位 【 表示 / 非表示

  • 学士 (教育学)

  • 博士 (医学)

  • 学士 (栄養学)

  • 修士 (医科学)

経歴 【 表示 / 非表示

  • 2014年
     
     

    札幌医科大学医学部 教員   School of Medicine Medical Sciences  

  • 1997年
     
     

    札幌市公立小学校 教員  

所属学協会 【 表示 / 非表示

  •  
     
     

    日本細菌学会

  •  
     
     

    日本感染症学会

  •  
     
     

    日本公衆衛生学会

  •  
     
     

    日本衛生学会

  •  
     
     

    日本臨床微生物学会

researchmapの所属 【 表示 / 非表示

  • 札幌医科大学   医学部医学科 基礎医学部門 衛生学講座  

 

研究キーワード 【 表示 / 非表示

  • 分子疫学

  • 公衆栄養学

  • 予防医学

  • 微生物学

  • 公衆衛生学

全件表示 >>

論文 【 表示 / 非表示

  • Molecular characterization of methicillin-susceptible/resistant Staphylococcus aureus from bloodstream infections in northern Japan: The dominance of CC1-MRSA-IV, the emergence of human-associated ST398 and livestock-associated CC20 and CC97 MSSA

    Meiji Soe Aung, Masako Osada, Noriko Urushibara, Mitsuyo Kawaguchiya, Nobuhide Ohashi, Mina Hirose, Masahiko Ito, Kazuki Yamada, Kousuke Tada, Nobumichi Kobayashi

    Journal of Global Antimicrobial Resistance   41   77 - 87  2025年03月

     概要を見る

    Objectives: Staphylococcus aureus (S. aureus) is a major cause of bloodstream infections. The recent epidemiological features and antimicrobial resistance trend were analysed for methicillin-resistant and susceptible S. aureus (MRSA/MSSA) isolates from blood samples in people from northern Japan. Methods: The S. aureus isolates from blood culture were screened by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) and genotyped by the schemes of multilocus sequence typing (MLST), coa, agr, spa, and SCCmec types. Antimicrobial resistance genes and virulence factors were detected by multiplex/uniplex polymerase chain reaction (PCR). Antimicrobial susceptibility was examined using a broth microdilution test. Results: A total of 301 isolates (163 MRSA and 138 MSSA) were isolated from bloodstream infections in 2023 (from April to December). The MRSA isolates were classified into three groups, that is, clonal complexes (CC)1-SCCmec-IV (CC1-IV) (52%), CC5-II (36%), and CC8-IV (12%). The prevalence of CC1 was significantly higher than those in our previous studies (2017–2021). Four CC8-IVa isolates with PVL genes on ΦSa2usa were considered to be the USA300 clone (sequence type [ST]8/spa-t008/coa IIIa/agr I) or its variants that were genotyped as those closely related to ST8/t008 or lacking arginine catabolic mobile element (ACME). In contrast, MSSA was genetically highly divergent and classified into 22 STs, with CC1 (ST1 and ST188) being the most common (25%). It was notable that 29 MSSA isolates (21%) were classified into livestock-associated (LA) genotypes, ST20, ST97, and CC398 (ST398 and ST291). Genetic characterization of the CC398 isolates suggested that these belong to human-adapted MSSA clones. Conclusions: The present study revealed the increasing trend of CC1 MRSA surpassing CC5, and the emergence of MSSA representing human-adapted CC398, and LA types ST97 and ST20 from bloodstream infections in people in Japan. © 2024 The Author(s). Published by Elsevier Ltd on behalf of International Society for Antimicrobial Chemotherapy.

    DOI PubMed

  • Molecular characterization of methicillin-susceptible/resistant Staphylococcus aureus from bloodstream infections in northern Japan: The dominance of CC1-MRSA-IV, the emergence of human-associated ST398 and livestock-associated CC20 and CC97 MSSA.

    Meiji Soe Aung, Masako Osada, Noriko Urushibara, Mitsuyo Kawaguchiya, Nobuhide Ohashi, Mina Hirose, Masahiko Ito, Kazuki Yamada, Kousuke Tada, Nobumichi Kobayashi

    Journal of global antimicrobial resistance   41   77 - 87  2024年12月  [国際誌]

     概要を見る

    OBJECTIVES: Staphylococcus aureus (S. aureus) is a major cause of bloodstream infections. The recent epidemiological features and antimicrobial resistance trend were analysed for methicillin-resistant and susceptible S. aureus (MRSA/MSSA) isolates from blood samples in people from northern Japan. METHODS: The S. aureus isolates from blood culture were screened by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) and genotyped by the schemes of multilocus sequence typing (MLST), coa, agr, spa, and SCCmec types. Antimicrobial resistance genes and virulence factors were detected by multiplex/uniplex polymerase chain reaction (PCR). Antimicrobial susceptibility was examined using a broth microdilution test. RESULTS: A total of 301 isolates (163 MRSA and 138 MSSA) were isolated from bloodstream infections in 2023 (from April to December). The MRSA isolates were classified into three groups, that is, clonal complexes (CC)1-SCCmec-IV (CC1-IV) (52%), CC5-II (36%), and CC8-IV (12%). The prevalence of CC1 was significantly higher than those in our previous studies (2017-2021). Four CC8-IVa isolates with PVL genes on ΦSa2usa were considered to be the USA300 clone (sequence type [ST]8/spa-t008/coa IIIa/agr I) or its variants that were genotyped as those closely related to ST8/t008 or lacking arginine catabolic mobile element (ACME). In contrast, MSSA was genetically highly divergent and classified into 22 STs, with CC1 (ST1 and ST188) being the most common (25%). It was notable that 29 MSSA isolates (21%) were classified into livestock-associated (LA) genotypes, ST20, ST97, and CC398 (ST398 and ST291). Genetic characterization of the CC398 isolates suggested that these belong to human-adapted MSSA clones. CONCLUSIONS: The present study revealed the increasing trend of CC1 MRSA surpassing CC5, and the emergence of MSSA representing human-adapted CC398, and LA types ST97 and ST20 from bloodstream infections in people in Japan. © 2024 The Author(s). Published by Elsevier Ltd on behalf of International Society for Antimicrobial Chemotherapy.

    DOI PubMed

  • Serotype distribution and antimicrobial resistance of Streptococcus pneumoniae isolated from children in Japan, 2023.

    Mitsuyo Kawaguchiya, Noriko Urushibara, Meiji Soe Aung, Nobuhide Ohashi, Sho Tsutida, Kayo Kurashita, Masahiko Ito, Nobumichi Kobayashi

    New microbes and new infections   62   101513 - 101513  2024年12月  [査読有り]  [国際誌]

    担当区分:   筆頭著者  , 責任著者

     概要を見る

    BACKGROUND: The prevalence of serotypes and antimicrobial resistance of Streptococcus pneumoniae was characterized among children thirteen years after the licensure of the pneumococcal conjugate vaccine (PCV) in Japan. METHODS: A total of 353 pneumococcal isolates were collected from Japanese children between March and July 2023. All the isolates were serotyped using genetic methods and tested for susceptibility to 14 antimicrobial agents. RESULTS: Among the 353 isolates, the prevalence rates of non-PCV13 and non-PCV20 serotypes were 96.9 % and 77.9 %, respectively, including the dominant non-PCV13/PCV20 serotypes 23A (16.1 %), 35B (15.3 %), 15A (10.5 %), 15C (9.3 %), and 34 (9.1 %), which accounted for 60.3 % of all isolates. The high non-susceptibility rates were observed for macrolides (erythromycin, azithromycin, and clarithromycin; ≥81.9 %) and tetracycline (80.7 %). Penicillin non-susceptibility and multidrug resistance (MDR) were detected in 49.9 % (6.8 % resistant and 43.1 % intermediate) and 68.3 % of the isolates, respectively. The three most common non-PCV13/PCV20 serotypes 15A, 23A, and 35B exhibited high prevalence rates of penicillin non-susceptibility (≥89.5 %) and MDR (≥81.5 %). Extensive drug resistance was observed in 10.5 % of all isolates belonging to six different serotypes (12F, 23A, 11A, 15A, 35B, and 15B) and in the non-encapsulated strains of S. pneumoniae. CONCLUSIONS: Our study revealed a higher prevalence of non-susceptibility to penicillin with MDR in the three most common non-PCV13/PCV20 serotypes 15A, 23A, and 35B, in Japan, suggesting their persistence in the PCV13 era.

    DOI PubMed

  • Prevalence and antimicrobial resistance of three clones (ST1223, ST2198, ST2250) of Staphylococcus argenteus clinical isolates in northern Japan.

    Meiji Soe Aung, Noriko Urushibara, Mitsuyo Kawaguchiya, Nobuhide Ohashi, Mina Hirose, Kenji Kudo, Masahiko Ito, Nobumichi Kobayashi

    Journal of global antimicrobial resistance    2024年11月  [査読有り]  [国際誌]

     概要を見る

    OBJECTIVES: Staphylococcus argenteus, a newly described species of coagulase-positive Staphylococcus, was first identified in clinical isolates in northern Japan in 2019. The aim of the present study was to clarify the trends in the epidemiological features and antimicrobial resistance traits of S. argenteus in the recent years. METHODS: S. argenteus isolates from various clinical specimens were screened using MALDI-TOF and genotyped using the MLST scheme. Antimicrobial susceptibility was determined using broth microdilution test and resistance genes were detected by multiplex/uniplex PCR. Nucleotide sequences of hemolysin genes (hla, hlb, hld, and hlg) were determined and analyzed in some isolates. RESULTS: From August 2020 to December 2023, 210 isolates were identified as S. argenteus. The ratio of S. argenteus to S. aureus clinical isolates was 0.0045, showing a slightly decreasing trend compared to what was previously reported (2019.8-2020.7). Three genotypes, ST1223-coa-XV, ST2198-coa-XIV, and ST2250-coa-XId were identified, with ST2250 being dominant (49%) and exhibiting an increasing trend. S. argenteus isolates were almost susceptible to antimicrobials examined, while ST2198 isolates showed higher resistance rates to ampicillin, macrolides, and aminoglycosides than other clones, harboring blaZ, msrA, and aac(6')-Ie-aph(2")-Ia. Only eight isolates (4-ST2250, 3-ST1223, and 1-ST2198) did not show hemolysis on blood agar plates. These isolates had intact hemolysin genes and promoter regions; however, a novel deletion mutation in hlg-component A was detected in some hemolytic and non-hemolytic isolates. CONCLUSIONS: The present study revealed the epidemiological trend of S. argenteus clones in northern Japan, along with the occurrence of non-hemolytic isolates with intact hemolysin genes.

    DOI PubMed

  • Genetic characterization of methicillin-resistant / susceptible Staphylococcus aureus (MRSA/MSSA) and Staphylococcus argenteus clinical isolates in Bangladesh: Dominance of ST6-MRSA-IV/t304 and detection of cfr/fexA in ST8-MSSA/t008

    Sangjukta Roy, Meiji Soe Aung, Shyamal Kumar Paul, Syeda Anjuman Nasreen, Nazia Haque, Rummana Mazid, Md Shahed Khan, Tridip Kanti Barman, Parvez Arafa, Fardousi Akter Sathi, Sultana Shabnam Nila, Afsana Jahan, Noriko Urushibara, Mitsuyo Kawaguchiya, Nobuhide Ohashi, Nobumichi Kobayashi

    IJID Regions   10   132 - 139  2024年03月  [査読有り]

     概要を見る

    Objectives: Coagulase-positive staphylococcus (CoPS), represented by Staphylococcus aureus, is a major cause of infections in humans. This study aimed to investigate molecular epidemiological characteristics, antimicrobial resistance, and their trends of CoPS in Bangladesh. Methods: Clinical isolates of CoPS were collected from two medical institutions in Bangladesh for a 2-year period and analyzed for their species, genotypes, virulence factors, antimicrobial susceptibility, and resistance determinants. Results: 172 CoPS isolates collected were identified as S. aureus or S. argenteus (170 and two, respectively). Methicillin-resistant S. aureus (MRSA) accounted for 36% (n = 61), having Staphylococcal cassette chromosome mec (SCCmec)-IV (82%) or V (18%). Panton-Valentine leukocidin (PVL) genes were detected at higher rate in methicillin-susceptible S. aureus (MSSA) (62%) than MRSA (26%). MRSA comprised 11 STs, including a dominant type ST6 (46%) associated with mostly SCCmec-IVa/spa-t304, and one isolate had genetic features of the USA300 clone (ST8/SCCmec-IVa/coa-IIIa/spa-t008/ACME-I/ΦSa2USA). STs of CC1, CC88, and CC398 were common in MSSA, with CC88 showing the highest PVL-positive rate. One MSSA isolate (ST8/spa-t008) harbored fexA and cfr showing susceptibility to linezolid. S. argenteus was methicillin-susceptible and belonged to ST2250/coa-XId. Conclusions: Genetic characteristics of current MRSA/MSSA in Bangladesh were revealed, with first identification of S. argenteus at low prevalence.

    DOI

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Misc 【 表示 / 非表示

  • 2023年に小児から分離された肺炎球菌の血清型分布の動向

    川口谷 充代, 漆原 範子, Meiji Soe Aung, 大橋 伸英, 木村 優希, 堀野 裕香, 伊藤政彦, 小林宣道

    日本細菌学雑誌 79 (2) ( 日本細菌学会 )  79 ( 2 ) 98 - 98  2024年08月

  • Molecular epidemiological characterization of MRSA from bloodstream infections in Hokkaido(タイトル和訳中)

    Aung Meiji Soe, 漆原 範子, 川口谷 充代, 大橋 伸英, 荒木 蕗羽, 松原 加奈, 伊藤 政彦, 小林 宣道

    日本細菌学雑誌 ( 日本細菌学会 )  79 ( 2 ) 73 - 73  2024年06月

  • Characteristics of Staphylococcaceae in Retail Meat Products in Hokkaido: A One Health Perspective(タイトル和訳中)

    漆原 範子, アウン・メイジソウ, 川口谷 充代, 大橋 伸英, 小林 宣道

    日本細菌学雑誌 ( 日本細菌学会 )  79 ( 2 ) 100 - 100  2024年06月

  • 肺炎球菌結合型ワクチン導入10年後における肺炎球菌の血清型分布と薬剤感受性

    川口谷充代, 漆原範子, アウン メイジソウ, 大橋伸英, 高松里佳, 土田翔, 伊藤政彦, 小林宣道

    日本衛生学雑誌(Web)   79 ( Supplement )  2024年

    J-GLOBAL

  • 北海道における血流感染症由来MRSAの分子疫学的解析

    小林宣道, アウン メイジソウ, 漆原範子, 川口谷充代, 大橋伸英, 荒木蕗羽, 松原加奈, 伊藤政彦

    日本衛生学雑誌(Web)   79 ( Supplement )  2024年

    J-GLOBAL

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受賞 【 表示 / 非表示

  • 平成29年度 北海道公衆衛生協会賞:北海道における非侵襲性感染症由来肺炎球菌の血清型と薬剤耐性に関する分子疫学的研究

    2017年  

    受賞者: 川口谷 充代

共同研究・競争的資金等の研究課題 【 表示 / 非表示

  • アジアにおける高病原性ブドウ球菌の分子疫学および新規病原因子・機序の網羅的探索

    国際共同研究加速基金(海外連携研究)

    研究期間:

    2023年09月
    -
    2027年03月
     

    小林 宣道, 漆原 範子, 川口谷 充代, アウン メイジソウ, 大橋 伸英

  • ワクチン普及後に拡大した新興の多剤耐性肺炎球菌感染症制御のための分子疫学的研究

    基盤研究(C)

    研究期間:

    2022年04月
    -
    2025年03月
     

    川口谷 充代, 小林 宣道

  • 日本とアジアにおける新種・新興薬剤耐性ブドウ球菌の分子疫学と感染制御の基盤構築

    基盤研究(B)

    研究期間:

    2020年04月
    -
    2024年03月
     

    小林 宣道, アウン メイジソウ, 川口谷 充代, 漆原 範子

     研究概要を見る

    本研究の目的は、薬剤耐性および臨床検査の面で近年注目されている新規ブドウ球菌種S.argenteus、市中感染型MRSA(CA-MRSA)、抗MRSA薬耐性菌等について、その疫学的状況を明らかにし感染対策の方策を探ることである。今年度は北海道において分離されたS.argenteus 82株、血液由来CA-MRSA 277株を対象として、分子疫学的解析を行った。S.argenteusは3つの遺伝子型ST1223、ST2198、ST2250に分類され、ST2250が最も多かった。STにより病原因子、特にエンテロトキシン(様)遺伝子と、薬剤耐性に違いが認められた。ST2198株は、他の2つのSTに比べ薬剤耐性遺伝子の検出率および一部薬剤への耐性率が有意に高かった。Panton-Valentine leukocidin(PVL)陽性菌、SCCmecIVcを有するメチシリン耐性菌がST2250において1株ずつ同定された。血液由来CA-MRSAでは、SCCmecIIaを保有するST5/ST764/ST2389が最も多く、次いで多かったのはSCCmecIVa、IVlを有する株であった。米国で優勢なUSA300と同じ特徴(SCCmecIVa/ST8/PVL+/ACME+)の株が全体の5.1%を占めており、以前のデータと比較して増加の傾向が示唆された。一方、PVLを保有しないSCCmecIVa MRSAが64株(23%)検出され、それらは多様な遺伝子型に属していた。USA300クローンが典型的に有するspeG遺伝子が、ST764-SCCmecIIaのMRSA2株に存在することが判明し、新たな特徴を持つMRSAが出現していることが示唆された。

  • 蛋白結合型ワクチン導入後に分離された 無莢膜型肺炎球菌の薬剤耐性と分子疫学的特徴

    研究期間:

    2019年
    -
    2021年
     

    川口谷充代

    担当区分: 研究代表者

  • 新型エンテロトキシン・病原因子を保有する黄色ブドウ球菌・MRSAの分子疫学

    基盤研究(C)

    研究期間:

    2018年04月
    -
    2021年03月
     

    アウン メイジソウ, 川口谷 充代, 小林 宣道, 漆原 範子

     研究概要を見る

    新型エンテロトキシン(SE)(様)毒素遺伝子について、黄色ブドウ球菌および近縁菌種S. argenteusにおける分布状況と分子疫学的特徴を解析した。selw、selxは調べられた黄色ブドウ球菌の8割以上に検出され、また遺伝子学的多様性が認められた。sey、selzは黄色ブドウ球菌での分布は低率で、sel26、sel27は検出されなかった。S. argenteusのST2250に属する株はすべてseyを持ち、半分以上の株がselz、sel26、sel27を保有していた。新型SE(様)遺伝子の分布は、これらの菌種の遺伝子学的系統(ST)により異なることが明らかとなった。

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講演・口頭発表等 【 表示 / 非表示

  • Serotype distribution and antimicrobial resistance of Streptococcus pneumoniae isolated from a university hospital in Japan.

    Kawaguchiya M., Urushibara N., Shinagawa M., Kobayashi N.

    The 48th Asia-Pacific Academic Consortium for Public Health Conference:Tokyo, Japan.  

    開催年月日:
    2016年09月
     
     
  • 7価および13価肺炎球菌結合型ワクチン導入による非侵襲性肺炎球菌臨床分離株の血清型の変化

    川口谷 充代  [招待有り]

    北海道臨床微生物フォーラム 2015  

    開催年月日:
    2015年
     
     
  • Novel multiplex PCR in combination with mutagenic PCR-RFLP analysis to distinguish Streptococcus pneumoniae serotypes 6A, 6B, 6C, and 6D.

    Kawaguchiya M., Urushibara N., Kobayashi N.

    The 12th Japan-Korea International Symposium on Microbiology:Tokyo, Japan.  

    発表年月: 2014年03月

    開催年月日:
    2014年03月
     
     
  • Serotype distribution, antimicrobial resistance, and prevalence of pilus islets of Streptococcus pneumoniae in Hokkaido, Japan.

    Kawaguchiya M., Urushibara N., Aung MS, Kobayashi N.

    International Union of Microbiological Societies Congresses:Singapore.  

    発表年月: 2017年09月

  • ミャンマー、バングラデシュにおける病原細菌の薬剤耐性 - 現状と今後の課題-.自由集会(包括的感染症研究会、「開発途上国そして日本における感染症対策の問題点 ~新型コロナ対策の視点も含めて~」)

    小林宣道, メイジ ソウ アウン, 漆原範子, 川口谷充代, ウィン ウィン モウ, ティダ サン, シャマル パウル

    第92回日本衛生学会総会  

    発表年月: 2022年03月

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担当経験のある科目(授業) 【 表示 / 非表示

  • 衛生学  

    札幌医科大学  

  • 基礎配属  

    札幌医科大学  

  • 医学英語  

    札幌医科大学  

  • 社会医学実習  

    札幌医科大学  

  • 小学校全教科  

    札幌市公立小学校  

 

学術貢献活動 【 表示 / 非表示

  • Microorganisms 査読

    https://www.mdpi.com/journal/microorganisms  

  • IJID Regions 査読

    https://www.sciencedirect.com/journal/ijid-regions  

  • Pathogens 査読

    https://www.mdpi.com/journal/pathogens  

  • BMC Infectious Diseases 査読

    https://bmcinfectdis.biomedcentral.com/  

  • Frontiers 査読

    https://www.frontiersin.org/