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Microbiology
Ireland
2026

D-Index & Metrics

Microbiology

D-Index
111
Citations
56677
World Ranking
229
National Ranking
6

Paul W. O'Toole 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 Paul W. O'Toole 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: 264 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 233 scientists 205–214 publications: 207 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: 337 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

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

Paul W. O'Toole 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 Paul W. O'Toole 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: 111 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 122 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: 93 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: 111 D-Index — 96th percentile

96% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2026 - Research.com Microbiology in Ireland Leader Award
  • 2025 - Research.com Microbiology in Ireland Leader Award

Overview

Paul W. O'Toole is affiliated with University College Cork in Ireland. Their research primarily spans the fields of Medicine and Biochemistry, Genetics and Molecular Biology. Within these domains, O'Toole's work involves detailed investigations in Molecular Biology, Physiology, Food Science, Public Health, Environmental and Occupational Health, and Infectious Diseases.

The core topics that dominate their research include:

  • Gut microbiota and health
  • Probiotics and Fermented Foods
  • Diet and metabolism studies
  • Nutritional Studies and Diet
  • Genomics and Phylogenetic Studies
  • Clostridium difficile and Clostridium perfringens research
  • Dietary Effects on Health

Frequent collaborators in their publications include Tarini Shankar Ghosh, Fergus Shanahan, Paul D. Cotter, Eibhlís M. O'Connor, and Jens Walter.

O'Toole has published multiple papers in well-known scientific venues, with frequent contributions to Gut Microbes, bioRxiv (Cold Spring Harbor Laboratory), Nutrients, Gastroenterology, and Scientific Reports.

Recent significant publications encompass:

  • A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae (2020) in INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
  • Mediterranean diet intervention alters the gut microbiome in older people reducing frailty and improving health status: the NU-AGE 1-year dietary intervention across five European countries (2020) in Gut
  • The gut microbiome as a modulator of healthy ageing (2022) in Nature Reviews Gastroenterology & Hepatology
  • Dietary Fibre Modulates the Gut Microbiota (2021) in Nutrients
  • Fermented Foods, Health and the Gut Microbiome (2022) in Nutrients

Best Publications

  • Gut microbiota composition correlates with diet and health in the elderly

    Marcus J. Claesson;Ian B. Jeffery;Susana Conde;Susan E. Power

  • A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae.

    Jinshui Zheng;Stijn Wittouck;Elisa Salvetti;Charles M A P Franz

  • Composition, variability, and temporal stability of the intestinal microbiota of the elderly

    Marcus J. Claesson;Siobhán Cusack;Orla O'Sullivan;Rachel Greene-Diniz

  • High-level adherence to a Mediterranean diet beneficially impacts the gut microbiota and associated metabolome.

    Francesca De Filippis;Nicoletta Pellegrini;Lucia Vannini;Ian B Jeffery

  • Exercise and associated dietary extremes impact on gut microbial diversity

    Siobhan F Clarke;Siobhan F Clarke;Eileen F Murphy;Orla O'Sullivan;Alice J Lucey

  • γ-Aminobutyric acid production by culturable bacteria from the human intestine.

    E. Barrett;R.P. Ross;R.P. Ross;P.W. O'Toole;G.F. Fitzgerald

  • Gut microbiota and aging.

    Paul W. O’Toole;Ian B. Jeffery

  • Enterotypes in the landscape of gut microbial community composition

    Paul I. Costea;Falk Hildebrand;Manimozhiyan Arumugam;Fredrik Bäckhed;Fredrik Bäckhed

  • Comparison of two next-generation sequencing technologies for resolving highly complex microbiota composition using tandem variable 16S rRNA gene regions

    Marcus J. Claesson;Qiong Wang;Orla O'Sullivan;Rachel Greene-Diniz

  • Composition and energy harvesting capacity of the gut microbiota: relationship to diet, obesity and time in mouse models

    E. F. Murphy;P. D. Cotter;P. D. Cotter;S. Healy;Tatiana M. Marques;Tatiana M. Marques

  • Bacteriocin production as a mechanism for the antiinfective activity of Lactobacillus salivarius UCC118

    Sinéad C. Corr;Yin Li;Christian U. Riedel;Paul W. O'Toole

  • Comparative analysis of pyrosequencing and a phylogenetic microarray for exploring microbial community structures in the human distal intestine.

    Marcus J. Claesson;Orla O'Sullivan;Qiong Wang;Janne Nikkilä

  • An irritable bowel syndrome subtype defined by species-specific alterations in faecal microbiota

    Ian B. Jeffery;Paul W. O'Toole;Lena Öhman;Marcus J. Claesson

  • Mediterranean diet intervention alters the gut microbiome in older people reducing frailty and improving health status: the NU-AGE 1-year dietary intervention across five European countries

    Tarini Shankar Ghosh;Simone Rampelli;Ian B Jeffery;Aurelia Santoro

  • Towards standards for human fecal sample processing in metagenomic studies

    Paul I. Costea;Georg Zeller;Shinichi Sunagawa;Eric Pelletier;Eric Pelletier

  • Next-generation probiotics: the spectrum from probiotics to live biotherapeutics

    Paul W. O'Toole;Julian Roberto Marchesi;Julian Roberto Marchesi;Colin Hill

  • Tumour-associated and non-tumour-associated microbiota in colorectal cancer

    Burkhardt Flemer;Denise B. Lynch;Jillian R. M. Brown;Ian B. Jeffery

  • The gut microbiome as a modulator of healthy ageing

    Unknown

  • Diversity of Bifidobacteria within the Infant Gut Microbiota

    Francesca Turroni;Francesca Turroni;Clelia Peano;Daniel A. Pass;Elena Foroni

  • The oral microbiota in colorectal cancer is distinctive and predictive.

    Burkhardt Flemer;Ryan D. Warren;Maurice P. J. Barrett;Katryna Cisek

  • Intestinal microbiota, diet and health.

    Susan E. Power;Paul W. O'Toole;Catherine Stanton;R. Paul Ross

Frequent Co-Authors

Catherine Stanton
Catherine Stanton Teagasc - The Irish Agriculture and Food Development Authority
R. Paul Ross
R. Paul Ross University College Cork
Fergus Shanahan
Fergus Shanahan National University of Ireland
Paul D. Cotter
Paul D. Cotter University College Cork
Marcus J. Claesson
Marcus J. Claesson University College Cork
Gerald F. Fitzgerald
Gerald F. Fitzgerald University College Cork
Douwe van Sinderen
Douwe van Sinderen University College Cork
Orla O'Sullivan
Orla O'Sullivan Teagasc - The Irish Agriculture and Food Development Authority
Willem M. de Vos
Willem M. de Vos Wageningen University & Research
Eamonn Martin Quigley
Eamonn Martin Quigley Cornell University

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