World's Best Scientists 2026 revealed!

D-Index & Metrics

Microbiology

D-Index
64
Citations
9946
World Ranking
2667
National Ranking
99

Keiji Oguma publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Keiji Oguma sits on this spectrum.

55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55 publications 679+

This scientist: 274 publications — 71st percentile

71% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

Keiji Oguma D-index placement in Microbiology in 2026

The chart shows the D-index (discipline H-index) distribution of Microbiology scientists ranked by Research.com in 2026. The highlighted bar marks where Keiji Oguma sits on this spectrum.

40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 64 D-Index — 54th percentile

54% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

Overview

Keiji Oguma is affiliated with Okayama University in Japan and has contributed to research primarily within the field of Medicine. Their work spans various subfields, including Infectious Diseases, Neurology, Public Health, Environmental and Occupational Health, Endocrinology, and Cardiology and Cardiovascular Medicine.

The scientist's research topics cover several specific areas such as Botulinum Toxin and Related Neurological Disorders, Streptococcal Infections and Treatments, Diphtheria, Corynebacterium, and Tetanus, SARS-CoV-2 and COVID-19 Research, COVID-19 Clinical Research Studies, and Viral Infections and Immunology Research.

Keiji Oguma has published in a range of venues, with recurring appearances in:

  • Anaerobe
  • Journal of Infection and Chemotherapy

Among their recent publications are the following papers:

  • Analysis of a plasmid encoding botulinum neurotoxin type G gene in Clostridium argentinense, 2020, Anaerobe
  • Antibody responses induced by the BNT162b2 mRNA COVID-19 vaccine in healthcare workers in a single community hospital in Japan, 2021, Journal of Infection and Chemotherapy

Frequent co-authors collaborating with Keiji Oguma include:

  • Yoshihiko Sakaguchi
  • Jumpei Uchiyama
  • A Take
  • Kazuyoshi Gotoh
  • Masakiyo Sakaguchi

Best Publications

  • The effect of eradicating helicobacter pylori on the development of gastric cancer in patients with peptic ulcer disease.

    Susumu Take;Motowo Mizuno;Kuniharu Ishiki;Yasuhiro Nagahara

  • Unique cholesteryl glucosides in Helicobacter pylori: composition and structural analysis.

    Y. Hirai;Mahmudul Haque;T. Yoshida;K. Yokota

  • Molecular composition of Clostridium botulinum type A progenitor toxins

    K Inoue;Y Fujinaga;T Watanabe;T Ohyama

  • The haemagglutinin of Clostridium botulinum type C progenitor toxin plays an essential role in binding of toxin to the epithelial cells of guinea pig small intestine, leading to the efficient absorption of the toxin

    Yukako Fujinaga;Kaoru Inoue;Sadahiro Watanabe;Kenji Yokota

  • Structure and Function of Clostridium botulinum Toxins

    Keiji Oguma;Yukako Fujinaga;Kaoru Inoue

  • The genome sequence of Clostridium botulinum type C neurotoxin-converting phage and the molecular mechanisms of unstable lysogeny

    Yoshihiko Sakaguchi;Tetsuya Hayashi;Ken Kurokawa;Keisuke Nakayama

  • Baseline gastric mucosal atrophy is a risk factor associated with the development of gastric cancer after Helicobacter pylori eradication therapy in patients with peptic ulcer diseases.

    Susumu Take;Motowo Mizuno;Kuniharu Ishiki;Yasuhiro Nagahara

  • Identification and characterization of functional subunits of Clostridium botulinum type A progenitor toxin involved in binding to intestinal microvilli and erythrocytes.

    Yukako Fujinaga;Kaoru Inoue;Takako Nomura;Junzo Sasaki

  • Lipid profile of Helicobacter spp.: presence of cholesteryl glucoside as a characteristic feature.

    Mahmudul Haque;Yoshikazu Hirai;Kenji Yokota;Noriko Mori

  • Helicobacter pylori heat-shock protein 60 induces interleukin-8 via a Toll-like receptor (TLR)2 and mitogen-activated protein (MAP) kinase pathway in human monocytes.

    Ying Zhao;Kenji Yokota;Kiyoshi Ayada;Yumiko Yamamoto

  • Chronic Infections and Atherosclerosis

    Kiyoshi Ayada;Kenji Yokota;Kazuko Kobayashi;Yehuda Shoenfeld;Yehuda Shoenfeld

  • The role of streptococcal hypersensitivity in the pathogenesis of Behçet's Disease.

    Fumio Kaneko;Noritaka Oyama;Hirokatsu Yanagihori;Emiko Isogai

  • The HA proteins of botulinum toxin disrupt intestinal epithelial intercellular junctions to increase toxin absorption.

    Takuhiro Matsumura;Yingji Jin;Yingji Jin;Yuko Kabumoto;Yuki Takegahara

  • Helicobacter pylori heat-shock protein 60 induces inflammatory responses through the Toll-like receptor-triggered pathway in cultured human gastric epithelial cells.

    Ryuta Takenaka;Kenji Yokota;Kiyoshi Ayada;Motowo Mizuno

  • Production of anti-neurotoxin antibody is enhanced by two subcomponents, HA1 and HA3b, of Clostridium botulinum type B 16S toxin–haemagglutinin

    Jae Chul Lee;Kenji Yokota;Hideyuki Arimitsu;Hyun Jung Hwang

  • Simple Method for Detection of Clostridium botulinum Type A to F Neurotoxin Genes by Ploymerase Chain Reaction

    Kouichi Takeshi;Yukako Fujinaga;Kaoru Inoue;Hiroshi Nakajima

  • Structure and Function of Clostridium Botulinum Progenitor Toxin

    K. Oguma;K. Inoue;Y. Fujinaga;K. Yokota

  • Molecular characterization of binding subcomponents of Clostridium botulinum type C progenitor toxin for intestinal epithelial cells and erythrocytes.

    Yukako Fujinaga;Kaoru Inoue;Shinobu Watarai;Yoshihiko Sakaguchi

  • Chemiluminescence of neutrophils from patients with Behçet's disease and its correlation with an increased proportion of uncommon serotypes of Streptococcus sanguis in the oral flora

    E. Isogai;S. Ohno;S. Kotake;H. Isogai

  • Infant botulism due to Clostridium botulinum type C toxin.

    Keiji Oguma;Kenji Yokota;Shunji Hayashi;Koichi Takeshi

Frequent Co-Authors

Nobuhiro Fujii
Nobuhiro Fujii Sapporo Medical University
Shigeaki Ohno
Shigeaki Ohno Hokkaido University
Yasushi Shiratori
Yasushi Shiratori Okayama University
Tadashi Yoshino
Tadashi Yoshino Okayama University
Eiji Matsuura
Eiji Matsuura Okayama University
Masahiro Asaka
Masahiro Asaka Hokkaido University
Igor Spigelman
Igor Spigelman University of California, Los Angeles
Koki Taniguchi
Koki Taniguchi Fujita Health University
Norihisa Ishii
Norihisa Ishii National Institutes of Biomedical Innovation, Health and Nutrition
Masayuki Saito
Masayuki Saito Hokkaido University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

For students pursuing microbiology in the USA, diversifying skills with related healthcare degrees can open up versatile career opportunities. Many professionals transition into roles such as medical coding and health information management, which complement a scientific background and offer stable job prospects.

Medical coding is a growing field that involves translating healthcare diagnoses and procedures into standardized codes. Exploring the cpc medical coding salary can provide insight into potential earnings and career growth. For those interested in formal education, there are some of the best fastest online medical billing and coding certificate programs available, offering convenient paths to certification.

Health information management (HIM) is another promising avenue, focusing on managing patient data and healthcare technology systems. Understanding health information management jobs salary helps evaluate this career’s financial potential. For students interested in advancing their expertise, enrolling in an online health information management degree programs cahiim accredited ensures education meets industry standards.

Overall, combining microbiology knowledge with these related healthcare degrees can create a robust career foundation, balancing science and administration while enhancing employability in the evolving healthcare sector.

Best Scientists Citing Keiji Oguma

Trending Scientists

Recently Published Articles