World's Best Scientists 2026 revealed!

D-Index & Metrics

Microbiology

D-Index
44
Citations
8519
World Ranking
5119
National Ranking
23

Ørjan Samuelsen 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 Ørjan Samuelsen 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: 148 publications — 26th percentile

26% of scientists in this discipline score the same or lower.

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

Ørjan Samuelsen 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 Ørjan Samuelsen 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: 44 D-Index — 8th percentile

8% of scientists in this discipline score the same or lower.

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

Overview

Ørjan Samuelsen is affiliated with the University Hospital of North Norway. Their research contributions focus on microbiology, molecular medicine, and antimicrobial resistance, reflecting intersections of biochemistry, genetics, and medicine.

The scientist has authored numerous publications emphasizing antibiotic resistance mechanisms, bacterial identification, and infection epidemiology. Their main fields of study include:

  • Biochemistry, Genetics and Molecular Biology
  • Medicine

The subfields of research encompass molecular medicine, endocrinology, molecular biology, epidemiology, and genetics.

  • Molecular Medicine
  • Endocrinology
  • Molecular Biology
  • Epidemiology
  • Genetics

Key topics addressed in their work cover antibiotic resistance in bacteria, Escherichia coli research, antibiotics pharmacokinetics and efficacy, gut microbiota and health, bacterial susceptibility testing, Enterobacteriaceae, and bacteriophage interactions.

  • Antibiotic Resistance in Bacteria
  • Escherichia coli research studies
  • Antibiotics Pharmacokinetics and Efficacy
  • Bacterial Identification and Susceptibility Testing
  • Gut microbiota and health
  • Enterobacteriaceae and Cronobacter Research
  • Bacteriophages and microbial interactions

Notable recent publications by Ørjan Samuelsen include:

  • Integrated chromosomal and plasmid sequence analyses reveal diverse modes of carbapenemase gene spread among Klebsiella pneumoniae (2020), published in Proceedings of the National Academy of Sciences
  • Emergence and dissemination of antimicrobial resistance in Escherichia coli causing bloodstream infections in Norway in 2002-17: a nationwide, longitudinal, microbial population genomic study (2021), published in The Lancet Microbe
  • Gastrointestinal carriage of Klebsiella pneumoniae in a general adult population: a cross-sectional study of risk factors and bacterial genomic diversity (2021), published in Gut Microbes
  • Cross-border spread of blaNDM-1- and blaOXA-48-positive Klebsiella pneumoniae: a European collaborative analysis of whole genome sequencing and epidemiological data, 2014 to 2019 (2020), published in Eurosurveillance
  • Evolution of β-lactamase-mediated cefiderocol resistance (2022), published in Journal of Antimicrobial Chemotherapy

Frequent co-authors of Ørjan Samuelsen include:

  • Jukka Corander
  • Pål J. Johnsen
  • Anna K. Pöntinen
  • Arnfinn Sundsfjord
  • Rebecca A. Gladstone

The scientist publishes regularly in several venues, with the most frequent being:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Eurosurveillance
  • SSRN Electronic Journal
  • The Lancet Microbe
  • Nature Communications

Best Publications

  • Rapid evolution and spread of carbapenemases among Enterobacteriaceae in Europe

    R. Cantón;M. Akóva;Y. Carmeli;C.G. Giske

  • Occurrence of carbapenemase-producing Klebsiella pneumoniae and Escherichia coli in the European survey of carbapenemase-producing Enterobacteriaceae (EuSCAPE): a prospective, multinational study.

    Hajo Grundmann;Hajo Grundmann;Corinna Glasner;Corinna Glasner;Barbara Albiger;David M Aanensen;David M Aanensen

  • The role of whole genome sequencing in antimicrobial susceptibility testing of bacteria : report from the EUCAST Subcommittee

    M J Ellington;O Ekelund;Frank Møller Aarestrup;R Canton

  • Insights into the global molecular epidemiology of carbapenem non-susceptible clones of Acinetobacter baumannii.

    Nabil Karah;Nabil Karah;Arnfinn Sundsfjord;Arnfinn Sundsfjord;Kevin Towner;Ørjan Samuelsen

  • A sensitive and specific phenotypic assay for detection of metallo-β-lactamases and KPC in Klebsiella pneumoniae with the use of meropenem disks supplemented with aminophenylboronic acid, dipicolinic acid and cloxacillin

    C.G. Giske;C.G. Giske;L. Gezelius;Ø. Samuelsen;M. Warner

  • Niclosamide is a proton carrier and targets acidic endosomes with broad antiviral effects.

    Andreas Jurgeit;Robert McDowell;Stefan Moese;Eric Meldrum

  • Escherichia coli Sequence Type 410 Is Causing New International High-Risk Clones

    Louise Roer;Søren Overballe-Petersen;Frank Hansen;Kristian Schønning;Kristian Schønning

  • Emergence of clonally related Klebsiella pneumoniae isolates of sequence type 258 producing plasmid-mediated KPC carbapenemase in Norway and Sweden

    Ørjan Samuelsen;Umaer Naseer;Ståle Tofteland;Dag Harald Skutlaberg

  • Molecular Epidemiology of Metallo-β-Lactamase-Producing Pseudomonas aeruginosa Isolates from Norway and Sweden Shows Import of International Clones and Local Clonal Expansion

    Ørjan Samuelsen;Mark A. Toleman;Arnfinn Sundsfjord;Arnfinn Sundsfjord;Johan Rydberg

  • Lactoferricin B inhibits bacterial macromolecular synthesis in Escherichia coli and Bacillus subtilis.

    Hilde Ulvatne;Ørjan Samuelsen;Ørjan Samuelsen;Hanne H. Haukland;Hanne H. Haukland;Manuela Krämer

  • A long-term low-frequency hospital outbreak of KPC-producing Klebsiella pneumoniae involving Intergenus plasmid diffusion and a persisting environmental reservoir.

    Ståle Tofteland;Umaer Naseer;Umaer Naseer;Jan Helge Lislevand;Arnfinn Sundsfjord;Arnfinn Sundsfjord

  • Species identification and molecular characterization of Acinetobacter spp. blood culture isolates from Norway

    Nabil Karah;Nabil Karah;Bjørg Haldorsen;Kristin Hegstad;Kristin Hegstad;Gunnar Skov Simonsen;Gunnar Skov Simonsen;Gunnar Skov Simonsen

  • Molecular characterization of VIM-producing Klebsiella pneumoniae from Scandinavia reveals genetic relatedness with international clonal complexes encoding transferable multidrug resistance

    Ø. Samuelsen;Mark Alexander Howard Toleman;V. Hasseltvedt;K. Fuursted

  • Conserved collateral antibiotic susceptibility networks in diverse clinical strains of Escherichia coli.

    Nicole L Podnecky;Elizabeth G A Fredheim;Julia Kloos;Vidar Sørum

  • Molecular epidemiology of KPC-2- producing Klebsiella pneumoniae isolates in Brazil: the predominance of sequence type 437

    Liliane M. Seki;Polyana S. Pereira;Maria da Penha A.H. de Souza;Magda de S. Conceição

  • Antimicrobial and cytotoxic activity of agelasine and agelasimine analogs.

    Anders Vik;Erik Hedner;Colin Charnock;Linda W. Tangen

  • Identification of NDM-1-producing Enterobacteriaceae in Norway

    Ørjan Samuelsen;Carina M. Thilesen;Lars Heggelund;Anne N. Vada

  • Plasmid-mediated quinolone resistance determinants qnr and aac(6′)-Ib-cr in Escherichia coli and Klebsiella spp. from Norway and Sweden

    Nabil Karah;Nabil Karah;Laurent Poirel;Stina Bengtsson;Martin Sundqvist

  • Comparison of disk diffusion, Etest and VITEK2 for detection of carbapenemase‐producing Klebsiella pneumoniae with the EUCAST and CLSI breakpoint systems

    M. Vading;Ø. Samuelsen;B. Haldorsen;A.S. Sundsfjord;A.S. Sundsfjord

  • Emergence and dissemination of antimicrobial resistance in Escherichia coli causing bloodstream infections in Norway in 2002–17: a nationwide, longitudinal, microbial population genomic study

    Rebecca Ashley Gladstone;Alan McNally;Anna Kaarina Pöntinen;Gerry Tonkin-Hill

  • Epidemic of carbapenem-resistant Klebsiella pneumoniae in Europe is driven by nosocomial spread

    Sophia David;Sandra Reuter;Simon R. Harris;Corinna Glasner

Frequent Co-Authors

Arnfinn Sundsfjord
Arnfinn Sundsfjord University of Tromsø - The Arctic University of Norway
Christian G. Giske
Christian G. Giske Karolinska University Hospital
Timothy R. Walsh
Timothy R. Walsh University of Oxford
Gunnar Skov Simonsen
Gunnar Skov Simonsen Wellcome Sanger Institute
Jukka Corander
Jukka Corander University of Oslo
Katie L. Hopkins
Katie L. Hopkins Public Health England
Anette M. Hammerum
Anette M. Hammerum Statens Serum Institut
Mark Toleman
Mark Toleman Cardiff University
Kathryn E. Holt
Kathryn E. Holt London School of Hygiene & Tropical Medicine
Henrik Hasman
Henrik Hasman Statens Serum Institut

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