World's Best Scientists 2026 revealed!
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Microbiology
Ireland
2026

D-Index & Metrics

Microbiology

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

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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