馬場 美由紀 ( ババ ミユキ )

Baba, Miyuki

写真a

所属(所属キャンパス)

医学部 感染症学教室 ( 信濃町 )

職名

特任助教(有期)

学歴 【 表示 / 非表示

  • 2002年03月

    東京薬科大学, 生命科学部, 分子生命科学科

    大学, 卒業

  • 2004年03月

    北里大学, 感染制御科学府

    大学院, 修了, 修士

  • 2008年03月

    北里大学, 感染制御科学府

    大学院, 修了, 博士

学位 【 表示 / 非表示

  • 感染制御科学博士, 北里大学大学院, 課程, 2008年03月

 

研究分野 【 表示 / 非表示

  • ライフサイエンス / 細菌学

研究キーワード 【 表示 / 非表示

  • Mycoplasma pneumoniae

  • Real-time PCR

  • Streptococcus agalactiae

 

論文 【 表示 / 非表示

  • Genetic characteristics and antibiotic resistance of Haemophilus influenzae isolates from pediatric patients with acute otitis media after introduction of 13-valent pneumococcal conjugate vaccine in Japan

    Ubukata K., Morozumi M., Sakuma M., Adachi Y., Mokuno E., Tajima T., Iwata S., Inagaki M., Kamakazu K., Atago Y., Kakurai S., Iwamoto J., Usui S., Ooyama S., Sugano S., Kuroda H., Kamide Y., Kamide M., Murakawa Y., Kaieda S., Kawaziri I., Kawai A., Kikuchi Y., Sawaki S., Kyou K., Kimura S., Kimura Y., Kimura Y., Sashiyou H., Yoneya H., Kosaka K., Komeda M., Kobayashi K., Sakaida Y., Sawada S., Satoh T., Satoh M., Shimizu T., Kimura O., Shimada J., Hori Y., Sugita R., Sugita Y., Uchizono A., Soeda K., Tabuchi T., Matsuoka C., Suzuki C., Chiba H., Tsuboi Y., Tomiyama M., Nakano K., Nakazawa T., Fukumoto A., Fukumoto A., Nagura M., Nagayama I., Satoh M., Nakamura K., Noguchi K., Shiiba K., Nogami K., Matsuda H., Shiba E., Hirabayashi K., Hiyoshi M., Yamagishi S., Ozu C., Maruyama J., Matsubara S., Suetake M., Miyashita M., Mogami A., Yamaguchi M., Yamaoka H., Yuta A., Yoshikawa T., Toyofuku M., Mori S., Inagaki M.

    Journal of Infection and Chemotherapy (Journal of Infection and Chemotherapy)  2019年

    ISSN  1341321X

     概要を見る

    © 2019 Japanese Society of Chemotherapy and The Japanese Association for Infectious Diseases Acute otitis media (AOM) occurs commonly in pediatric populations. We examined resistance genotype, antibiotic susceptibility, quinolone (QL) resistance, and multilocus sequence type (MLST) among Haemophilus influenzae isolates causing AOM following introduction of pneumococcal conjugate vaccines in Japan. The AOM surveillance group included 69 participating otolaryngologists. Causative pathogens isolated from middle ear fluid (MEF) samples collected from 582 children with AOM were identified using both bacterial culture and real-time PCR. H. influenzae isolates among these pathogens were characterized by capsular type, resistance genotype, antibiotic susceptibility, QL resistance, and MLST. In 2016, H. influenzae was identified in 319 samples (54.8%), among which 72.4% (n = 231) tested positive by both culture and PCR; remaining H. influenzae cases were only PCR-positive. This proportion of H. influenzae positivity has increased significantly from 41.2% in 2006 (p < 0.001). Among culture-positive strains, genotypic β-lactamase-nonproducing ampicillin (AMP)-resistant (gBLNAR) strains were frequent (63.2%), with β-lactamase-nonproducing AMP-susceptible (gBLNAS) strains accounting for only 24.2%. Susceptibilities of gBLNAR to oral antimicrobials were best for tosufloxacin, followed by cefditoren and tebipenem; MIC 90 s were 0.031 μg/mL, 0.5 μg/mL, and 1 μg/mL, respectively. In 7 gBLNAR isolates (3.0%), QL susceptibility was low, owing to amino acid substitutions in GyrA and/or ParC. Sequence types identified numbered 107, including 28 that were new. Prevention of further increases in resistance to antimicrobial agents will require antibiotic selection based on characterization of causative pathogens in clinical practice.

  • Effects of pneumococcal conjugate vaccine on genotypic penicillin resistance and serotype changes, Japan, 2010–2017

    Ubukata K., Takata M., Morozumi M., Chiba N., Wajima T., Hanada S., Shouji M., Sakuma M., Iwata S.

    Emerging Infectious Diseases (Emerging Infectious Diseases)  24 ( 11 ) 2010 - 2020 2018年11月

    ISSN  10806040

     概要を見る

    © 2018, Centers for Disease Control and Prevention (CDC). All rights reserved. To clarify year-to-year changes in capsular serotypes, resistance genotypes, and multilocus sequence types of Streptococcus pneumoniae, we compared isolates collected from patients with invasive pneumococcal disease before and after introductions of 7-and 13-valent pneumococcal conjugate vaccines (PCV7 and PVC13, respectively). From April 2010 through March 2017, we collected 2,856 isolates from children and adults throughout Japan. Proportions of PCV13 serotypes among children decreased from 89.0% in fiscal year 2010 to 12.1% in fiscal year 2016 and among adults from 74.1% to 36.2%. Although nonvaccine serotypes increased after introduction of PCV13, genotypic penicillin resistance decreased from 54.3% in 2010 to 11.2% in 2016 among children and from 32.4% to 15.5% among adults. However, genotypic penicillin resistance emerged in 9 nonvaccine serotypes, but not 15A and 35B. Multilocus sequence typing suggested that resistant strains among nonvaccine serotypes may have evolved from clonal complexes 156 and 81. A more broadly effective vaccine is needed.

  • Multilocus Sequence Typing of Mycoplasma pneumoniae, Japan, 2002-2016.

    Ando M, Morozumi M, Adachi Y, Ubukata K, Iwata S.

    Emerging Infectious Diseases journal 24   1895 - 1901 2018年10月

    研究論文(学術雑誌)

  • Multilocus sequence typing of Mycoplasma pneumoniae, Japan, 2002–2016

    Ando M., Morozumi M., Adachi Y., Ubukata K., Iwata S.

    Emerging Infectious Diseases (Emerging Infectious Diseases)  24 ( 10 ) 1898 - 1901 2018年10月

    ISSN  10806040

     概要を見る

    © 2018, Centers for Disease Control and Prevention (CDC). All rights reserved. In Japan, Mycoplasma pneumoniae resistance to mac-rolides is high. To compare sequence types (STs) of susceptible and resistant isolates, we performed multilocus sequence typing for 417 isolates obtained in Japan during 2002–2016. The most prevalent ST overall was ST3, for macrolide-resistant was ST19, and for macrolide-suscepti-ble were ST14 and ST7.

  • Etiology of Acute Otitis Media and Characterization of Pneumococcal Isolates After Introduction of 13-Valent Pneumococcal Conjugate Vaccine in Japanese Children

    Ubukata K., Morozumi M., Sakuma M., Takata M., Mokuno E., Tajima T., Iwata S.

    The Pediatric infectious disease journal (The Pediatric infectious disease journal)  37 ( 6 ) 598 - 604 2018年06月

    研究論文(学術雑誌)

     概要を見る

    BACKGROUND: Acute otitis media is a leading cause of childhood morbidity and antibiotic prescriptions. We examined etiologic changes in acute otitis media after introduction of 13-valent pneumococcal conjugate vaccine as routine immunization for Japanese children in 2014. Serotypes, resistance genotypes, antibiotic susceptibilities and multilocus sequence typing of pneumococcal isolates were also characterized. METHODS: Otolaryngologists prospectively collected middle ear fluid from 582 children by tympanocentesis or sampling through a spontaneously ruptured tympanic membrane between June 2016 and January 2017. Causative pathogens were identified by bacterial culture and real-time polymerase chain reaction for bacteria. Serotypes, resistance genotypes, sequence types and susceptibilities to 14 antimicrobial agents were determined for pneumococcal isolates. RESULTS: At least 1 bacterial pathogen was identified in 473 of the samples (81.3%). Nontypeable Haemophilus influenzae (54.8%) was detected most frequently, followed by Streptococcus pneumoniae (25.4%), Streptococcus pyogenes (2.9%) and others. Pneumococci of current vaccine serotypes have decreased dramatically from 82.1% in 2006 to 18.5% (P < 0.001). Commonest serotypes were 15A (14.8%), 3 (13.9%) and 35B (11.1%). Serotype 3 was significantly less frequent among children receiving 13-valent pneumococcal conjugate vaccine compared with 7-valent pneumococcal conjugate vaccine (P = 0.002). Genotypic penicillin-resistant S. pneumoniae accounted for 28.7%, slightly less than in 2006 (34.2%; P = 0.393); the penicillin-resistant serotypes 15A and 35B had increased. Serotypes 15A, 3 and 35B most often belonged to sequence types 63, 180 and 558. CONCLUSIONS: Our findings are expected to assist in development of future vaccines, and they underscore the need for appropriate clinical choice of oral agents based on testing of causative pathogens.

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KOARA(リポジトリ)収録論文等 【 表示 / 非表示

研究発表 【 表示 / 非表示

  • Characteristics of Drug Resistance of Mycoplasma pneumoniae Isolates

    Morozumi Miyuki

    [国際会議]  Joint Congress of The 7th Meeting of the Asian Organization for Mycoplasmology (7th AOM), The 45th Meeting of the Japanese Society of Mycoplasmology (45th JSM) (Japan) , 

    2018年05月

    シンポジウム・ワークショップ パネル(指名)

  • 少子・高齢化社会におけるGBS感染症の本質的変化(ベーシックレクチャー8)

    諸角 美由紀

    第91回日本感染症学会総会・学術講演会, 

    2017年04月

    シンポジウム・ワークショップ パネル(指名)

  • 市中型呼吸器感染症に対する網羅的迅速診断法:その臨床への応用.

    諸角 美由紀

    第65回日本感染症学会東日本地方会学術集会, 

    2016年10月

    シンポジウム・ワークショップ パネル(指名)

  • A群・G群溶血性レンサ球菌に対するβ-ラクタム系薬とアミノ配糖体薬の併用効果.

    諸角 美由紀,高田 美佐子,江原 佳史,安藤 万里子,足立 容子,生方 公子,岩田 敏.

    第65回日本感染症学会東日本地方会学術集会, 

    2016年10月

    口頭発表(一般)

  • 小児肺炎例から分離されたMycoplasma pneumoniaeの Multilocus Sequence Typing (MLST)解析

    諸角 美由紀,高田 美佐子,生方 公子,岩田 敏

    日本マイコプラズマ学会第43回学術集会, 

    2016年06月

    口頭発表(一般)

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競争的研究費の研究課題 【 表示 / 非表示

  • 殺菌作用の増強と毒素産生の抑制を目的とした抗菌薬併用のメカニズム

    2015年04月
    -
    2017年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 諸角 美由紀, 若手研究(B), 補助金,  研究代表者

     研究概要を見る

    侵襲性感染症由来の肺炎球菌とβ溶血性レンサ球菌に対し,作用標的が異なるβ-ラクタム系薬とアミノ配糖体薬であるゲンタマイシン (GM)とを同時に作用させると,明らかな殺菌効果の増強が認められた。薬剤単独作用時と併用時の菌体内部構造の変化を透過型電子顕微鏡を用いて観察・比較したところ,併用時には明らかな異常像が観察された。また,LC/MS/MSを用いて細胞内のGM濃度を測定したところ,単独時にはGMはほとんど菌体内へ取り込まれなかったが,β-ラクタム系薬との併用時には細胞内GMの濃度は明らかに高まっていた。
    以上の成績から,薬剤の併用によって殺菌性の増強が生じると結論された。

受賞 【 表示 / 非表示

  • 森村豊明会奨励賞(北里大学)

    2010年

  • ASM Best oral presentation award

    2009年

  • 日本化学療法学会 学術奨励賞

    2007年

  • 上田記念感染症・化学療法研究奨励賞

    2005年

  • JIC Award 2004(年間最優秀論文賞)

    2005年

 

担当授業科目 【 表示 / 非表示

  • 熱帯医学・寄生虫学

    2024年度

  • 熱帯医学・寄生虫学

    2023年度

  • 熱帯医学・寄生虫学

    2022年度

  • 熱帯医学・寄生虫学

    2021年度

  • 熱帯医学・寄生虫学

    2020年度

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