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Orla O'Sullivan

D-Index & Metrics

Biology and Biochemistry

D-Index
72
Citations
27176
World Ranking
6154
National Ranking
30

Orla O'Sullivan publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Orla O'Sullivan sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 173 publications — 38th percentile

38% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Orla O'Sullivan D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Orla O'Sullivan sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 72 D-Index — 69th percentile

69% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Orla O'Sullivan is affiliated with Teagasc - The Irish Agriculture and Food Development Authority in Ireland. Their research primarily spans the fields of Biochemistry, Genetics and Molecular Biology, Medicine, and Agricultural and Biological Sciences. Molecular Biology constitutes a significant subfield of their work, alongside contributions to Food Science, Physiology, Plant Science, and Ecology.

The scientist's research topics include studies on gut microbiota and health, probiotics and fermented foods, diet and metabolism, genomics and phylogenetic studies, microbial community ecology and physiology, muscle metabolism and nutrition, and molecular biology techniques and applications.

Orla O'Sullivan has contributed to multiple scientific publication venues with frequent appearances in:

  • mSystems
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Scientific Reports
  • Microorganisms
  • Research Square (Research Square)

Some recent papers include:

  • Fermented-Food Metagenomics Reveals Substrate-Associated Differences in Taxonomy and Health-Associated and Antibiotic Resistance Determinants (2020, mSystems)
  • Enduring Behavioral Effects Induced by Birth by Caesarean Section in the Mouse (2020, Current Biology)
  • Fermented foods, their microbiome and its potential in boosting human health (2024, Microbial Biotechnology)
  • Evaluation of methods for the reduction of contaminating host reads when performing shotgun metagenomic sequencing of the milk microbiome (2020, Scientific Reports)
  • Next-Generation Food Research: Use of Meta-Omic Approaches for Characterizing Microbial Communities Along the Food Chain (2021, Annual Review of Food Science and Technology)

Frequent collaborators in their research include Paul D. Cotter, Wiley Barton, Fiona Crispie, Calum J. Walsh, and Paul W. O'Toole, reflecting a collaborative approach across various projects.

Best Publications

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

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

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

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

  • 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

  • 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

  • The complex microbiota of raw milk

    Lisa Quigley;Lisa Quigley;Orla O'Sullivan;Catherine Stanton;Tom P. Beresford

  • 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

  • Gut microbiota depletion from early adolescence in mice: Implications for brain and behaviour.

    Lieve Desbonnet;Gerard Clarke;Alexander Traplin;Orla O’Sullivan

  • Short-chain fatty acids: microbial metabolites that alleviate stress-induced brain-gut axis alterations.

    Marcel van de Wouw;Marcus Boehme;Joshua M. Lyte;Niamh Wiley;Niamh Wiley

  • M-Coffee : Combining multiple sequence alignment methods with T-Coffee

    Iain M. Wallace;Orla O'Sullivan;Desmond G. Higgins;Cedric Notredame

  • The microbiome of professional athletes differs from that of more sedentary subjects in composition and particularly at the functional metabolic level.

    Wiley Barton;Nicholas C Penney;Owen Cronin;Isabel Garcia-Perez

  • Expanding the biotechnology potential of lactobacilli through comparative genomics of 213 strains and associated genera

    Zhihong Sun;Hugh M B Harris;Angela McCann;Chenyi Guo

  • Sequence-based analysis of the bacterial and fungal compositions of multiple kombucha (tea fungus) samples.

    Alan J. Marsh;Alan J. Marsh;Orla O'Sullivan;Colin Hill;R. Paul Ross;R. Paul Ross

  • 3DCoffee: combining protein sequences and structures within multiple sequence alignments.

    Orla O'Sullivan;Karsten Suhre;Chantal Abergel;Desmond G Higgins

  • Effect of broad- and narrow-spectrum antimicrobials on Clostridium difficile and microbial diversity in a model of the distal colon

    Mary C. Rea;Alleson Dobson;Orla O'Sullivan;Fiona Crispie

  • Divergent metabolic outcomes arising from targeted manipulation of the gut microbiota in diet-induced obesity

    Eileen F Murphy;Paul D Cotter;Paul D Cotter;Aileen Hogan;Orla O'Sullivan

  • Molecular approaches to analysing the microbial composition of raw milk and raw milk cheese.

    Lisa Quigley;Orla O'Sullivan;Tom P. Beresford;R. Paul Ross

  • The effects of freezing on faecal microbiota as determined using MiSeq sequencing and culture-based investigations.

    Fiona Fouhy;Jennifer Deane;Mary C. Rea;Órla O’Sullivan

  • Gender-dependent consequences of chronic olanzapine in the rat: effects on body weight, inflammatory, metabolic and microbiota parameters

    Kieran J. Davey;Siobhain M. O’Mahony;Harriet Schellekens;Orla O’Sullivan;Orla O’Sullivan

  • Prenatal stress-induced alterations in major physiological systems correlate with gut microbiota composition in adulthood.

    Anna V. Golubeva;Sean Crampton;Lieve Desbonnet;Deirdre Edge

Frequent Co-Authors

Paul D. Cotter
Paul D. Cotter University College Cork
R. Paul Ross
R. Paul Ross University College Cork
Catherine Stanton
Catherine Stanton Teagasc - The Irish Agriculture and Food Development Authority
Fergus Shanahan
Fergus Shanahan National University of Ireland
Mary C. Rea
Mary C. Rea Teagasc - The Irish Agriculture and Food Development Authority
Colin Hill
Colin Hill University College Cork
Gerald F. Fitzgerald
Gerald F. Fitzgerald University College Cork
Paul W. O'Toole
Paul W. O'Toole University College Cork
John F. Cryan
John F. Cryan University College Cork
Timothy G. Dinan
Timothy G. Dinan University College Cork

External Links

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Best Scientists Citing Orla O'Sullivan

Catherine Stanton

Catherine Stanton

Teagasc - The Irish Agriculture and Food Development Authority

Publications: 207

R. Paul Ross

R. Paul Ross

University College Cork

Publications: 164

Paul D. Cotter

Paul D. Cotter

University College Cork

Publications: 162

John F. Cryan

John F. Cryan

University College Cork

Publications: 161

Willem M. de Vos

Willem M. de Vos

Wageningen University & Research

Publications: 155

Timothy G. Dinan

Timothy G. Dinan

University College Cork

Publications: 135

Paul W. O'Toole

Paul W. O'Toole

University College Cork

Publications: 108

Colin Hill

Colin Hill

University College Cork

Publications: 93

Toni Gabaldón

Toni Gabaldón

Institució Catalana de Recerca i Estudis Avançats

Publications: 74

Gerard Clarke

Gerard Clarke

University College Cork

Publications: 59

Fergus Shanahan

Fergus Shanahan

National University of Ireland

Publications: 57

Rob Knight

Rob Knight

University of California, San Diego

Publications: 52

Paula M. O'Connor

Paula M. O'Connor

Teagasc - The Irish Agriculture and Food Development Authority

Publications: 43

Douwe van Sinderen

Douwe van Sinderen

University College Cork

Publications: 41

Gerald F. Fitzgerald

Gerald F. Fitzgerald

University College Cork

Publications: 40

Patrizia Brigidi

Patrizia Brigidi

University of Bologna

Publications: 38

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