World's Best Scientists 2026 revealed!

D-Index & Metrics

Microbiology

D-Index
63
Citations
37158
World Ranking
2670
National Ranking
232

Petra Louis 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 Petra Louis 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: 123 publications — 14th percentile

14% of scientists in this discipline score the same or lower.

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

Petra Louis 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 Petra Louis 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: 63 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

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

Overview

Petra Louis is affiliated with the University of Aberdeen in the United Kingdom and has an extensive research background primarily centered on the gut microbiome and its impact on human health. Their work spans biochemistry, genetics, molecular biology, and medicine, with a significant focus on molecular biology, food science, nutrition and dietetics, physiology, and genetics.

The scientist's research topics include:

  • Gut microbiota and health
  • Probiotics and fermented foods
  • Diet and metabolism studies
  • Food composition and properties
  • Microbial metabolites in food biotechnology
  • Nutritional studies and diet
  • Digestive system and related health

Petra Louis has published extensively, with notable papers among them:

  • "Maturation of the gut microbiome during the first year of life contributes to the protective farm effect on childhood asthma," 2020, Nature Medicine
  • "Vitamin Biosynthesis by Human Gut Butyrate-Producing Bacteria and Cross-Feeding in Synthetic Microbial Communities," 2020, mBio
  • "Pivotal Roles for pH, Lactate, and Lactate-Utilizing Bacteria in the Stability of a Human Colonic Microbial Ecosystem," 2020, mSystems
  • "Microbial lactate utilisation and the stability of the gut microbiome," 2022, Gut Microbiome
  • "Analysis of 1321 Eubacterium rectale genomes from metagenomes uncovers complex phylogeographic population structure and subspecies functional adaptations," 2020, Genome Biology

The scientist frequently publishes in venues such as:

  • mBio
  • Gut Microbiome
  • Proceedings of The Nutrition Society
  • Environmental Microbiology
  • bioRxiv (Cold Spring Harbor Laboratory)

Petra Louis collaborates regularly with several co-authors, including:

  • Freda M. Farquharson
  • Sylvia H. Duncan
  • Harry J. Flint
  • Alan W. Walker
  • Wendy R. Russell

The combination of these research areas, venues, and collaborations highlights a focus on understanding the complex interactions within the gut microbiome, its role in human health and disease, and the metabolic activities of gut bacteria. This interdisciplinary approach integrates molecular biology techniques with nutritional and microbial ecology perspectives.

Best Publications

  • The gut microbiota, bacterial metabolites and colorectal cancer

    Petra Louis;Georgina L. Hold;Harry J. Flint

  • Formation of propionate and butyrate by the human colonic microbiota

    Petra Louis;Harry J. Flint

  • Diversity, metabolism and microbial ecology of butyrate-producing bacteria from the human large intestine.

    Petra Louis;Harry James Flint

  • Microbial degradation of complex carbohydrates in the gut

    Harry J. Flint;Karen P. Scott;Sylvia H. Duncan;Petra Louis

  • The role of the gut microbiota in nutrition and health

    Harry J. Flint;Karen P. Scott;Petra Louis;Sylvia H. Duncan

  • Dominant and diet-responsive groups of bacteria within the human colonic microbiota.

    Alan W Walker;Jennifer Ince;Sylvia H Duncan;Lucy M Webster

  • Human colonic microbiota associated with diet, obesity and weight loss.

    Sylvia Helen Duncan;Gerald Lobley;Grietje Holtrop;J. Ince

  • Phylogenetic distribution of three pathways for propionate production within the human gut microbiota

    Nicole Reichardt;Sylvia Helen Duncan;Pauline Young;Alvaro Belenguer

  • Lactate-Utilizing Bacteria, Isolated from Human Feces, That Produce Butyrate as a Major Fermentation Product

    Sylvia Helen Duncan;Petra Louis;Harry James Flint

  • Ruminococcus bromii is a keystone species for the degradation of resistant starch in the human colon.

    Xiaolei Ze;Sylvia Helen Duncan;Petra Louis;Harry James Flint

  • Links between diet, gut microbiota composition and gut metabolism.

    Harry James Flint;Sylvia H. Duncan;Karen P. Scott;Petra Louis

  • Diversity of human colonic butyrate-producing bacteria revealed by analysis of the butyryl-CoA:acetate CoA-transferase gene.

    Petra Louis;Pauline Young;Grietje Holtrop;Harry James Flint

  • Effect of inulin on the human gut microbiota: stimulation of Bifidobacterium adolescentis and Faecalibacterium prausnitzii.

    Carlett Ramirez-Farias;Kathleen Slezak;Zoe Fuller;Alan Stuart Duncan

  • Two Routes of Metabolic Cross-Feeding between Bifidobacterium adolescentis and Butyrate-Producing Anaerobes from the Human Gut

    Alvaro Belenguer;Sylvia H. Duncan;A. Graham Calder;Grietje Holtrop

  • Understanding the effects of diet on bacterial metabolism in the large intestine

    Petra Louis;Karen Patricia Scott;Sylvia Helen Duncan;Harry James Flint

  • Protection of Escherichia coli cells against extreme turgor by activation of MscS and MscL mechanosensitive channels: identification of genes required for MscS activity.

    Natalia Levina;Sabine Tötemeyer;Neil R. Stokes;Petra Louis

  • The role of pH in determining the species composition of the human colonic microbiota

    Sylvia H. Duncan;Petra Louis;John M. Thomson;Harry J. Flint

  • Interactions and competition within the microbial community of the human colon: links between diet and health

    Harry James Flint;Sylvia Helen Duncan;Karen Patricia Scott;Petra Louis

  • Impact of diet and individual variation on intestinal microbiota composition and fermentation products in obese men

    Anne Salonen;Leo Lahti;Jarkko Salojärvi;Grietje Holtrop

  • Restricted Distribution of the Butyrate Kinase Pathway among Butyrate-Producing Bacteria from the Human Colon

    Petra Louis;Sylvia H. Duncan;Sheila I. McCrae;Jacqueline Millar

Frequent Co-Authors

Harry J. Flint
Harry J. Flint University of Aberdeen
Sylvia H. Duncan
Sylvia H. Duncan University of Aberdeen
Alan W. Walker
Alan W. Walker University of Aberdeen
Karen P. Scott
Karen P. Scott University of Aberdeen
Georgina L. Hold
Georgina L. Hold University of New South Wales
Erwin A. Galinski
Erwin A. Galinski University of Bonn
Andrew J. Stagg
Andrew J. Stagg Queen Mary University of London
Emad M. El-Omar
Emad M. El-Omar University of New South Wales
Julian Parkhill
Julian Parkhill University of Cambridge
Richard Ducatelle
Richard Ducatelle Ghent University

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