World's Best Scientists 2026 revealed!
John Elmerdahl Olsen

John Elmerdahl Olsen

D-Index & Metrics

Microbiology

D-Index
69
Citations
15290
World Ranking
2073
National Ranking
29

John Elmerdahl Olsen 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 John Elmerdahl Olsen 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: 365 publications — 86th percentile

86% of scientists in this discipline score the same or lower.

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

John Elmerdahl Olsen 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 John Elmerdahl Olsen 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: 69 D-Index — 64th percentile

64% of scientists in this discipline score the same or lower.

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

Overview

John Elmerdahl Olsen is affiliated with the University of Copenhagen in Denmark and has an extensive research background primarily in the fields of Biochemistry, Genetics and Molecular Biology, Medicine, and Agricultural and Biological Sciences. Their work spans several subfields including Endocrinology, Food Science, Molecular Biology, Infectious Diseases, and Molecular Medicine.

The scientist's research topics focus on areas such as Salmonella and Campylobacter epidemiology, Antibiotic Resistance in Bacteria, Escherichia coli research studies, Bacteriophages and microbial interactions, Vibrio bacteria research studies, Viral gastroenteritis research and epidemiology, and Bacterial Genetics and Biotechnology.

Recent notable papers authored or co-authored by Olsen include:

  • Antimicrobial-induced horizontal transfer of antimicrobial resistance genes in bacteria: a mini-review (2021, Journal of Antimicrobial Chemotherapy)
  • Post-weaning diarrhea in pigs weaned without medicinal zinc: risk factors, pathogen dynamics, and association to growth rate (2021, Porcine Health Management)
  • Prevalence and risk factors of Salmonella in commercial poultry farms in Nigeria (2020, PLoS ONE)
  • Indications for the use of highest priority critically important antimicrobials in the veterinary sector (2020, Journal of Antimicrobial Chemotherapy)
  • F4- and F18-Positive Enterotoxigenic Escherichia coli Isolates from Diarrhea of Postweaning Pigs: Genomic Characterization (2020, Applied and Environmental Microbiology)

Olsen has frequently published in several scientific venues, including:

  • Antibiotics
  • Frontiers in Microbiology
  • Veterinary Microbiology
  • Scientific Reports
  • Porcine Health Management

Frequent co-authors with whom Olsen has collaborated include Ana Herrero-Fresno, Henrik Christensen, Eglė Kudirkienė, Anders Dalsgaard, and Vanesa García.

Best Publications

  • Host adapted serotypes of Salmonella enterica.

    Sergio Uzzau;Derek J. Brown;Timothy S. Wallis;Salvatore Rubino

  • Taxonomic relationships of the [Pasteurella] haemolytica complex as evaluated by DNA-DNA hybridizations and 16S rRNA sequencing with proposal of Mannheimia haemolytica gen. nov., comb. nov., Mannheimia granulomatis comb. nov., Mannheimia glucosida sp. nov., Mannheimia ruminalis sp. nov. and Mannheimia varigena sp. nov.

    Øystein Angen;Reinier Mutters;Dominique A. Caugant;John E. Olsen

  • Antibiotic Resistance in Acinetobacter spp. Isolated from Sewers Receiving Waste Effluent from a Hospital and a Pharmaceutical Plant

    Luca Guardabassi;Andreas Petersen;John E. Olsen;Anders Dalsgaard

  • Salmonella identification by the polymerase chain reaction

    John Elmerdahl Olsen;Soren Aabo;Lone Rossen;Ole Feldballe Rasmussen

  • Listeria monocytogenes exists in at least three evolutionary lines: evidence from flagellin, invasive associated protein and listeriolysin O genes

    Ole F. Rasmussen;Pernille Skouboe;Lone Dons;Lone Rossen

  • Diversity and evolution of blaZ from Staphylococcus aureus and coagulase-negative staphylococci

    John Elmerdahl Olsen;Henrik Christensen;Frank Møller Aarestrup

  • Clonal lines of Salmonella enterica serotype Enteritidis documented by IS200-, ribo-, pulsed-field gel electrophoresis and RFLP typing.

    J. E. Olsen;Marianne N. Skov;E. J. Threlfall;D. J. Brown

  • Distribution and in-vitro transfer of tetracycline resistance determinants in clinical and aquatic Acinetobacter strains

    L. Guardabassi;L. Dijkshoorn;J.-M. Collard;J.E. Olsen

  • Probes and polymerase chain reaction for detection of food-borne bacterial pathogens.

    J.E Olsen;S Aabo;W Hill;S Notermans

  • Rapid quantification of viable Campylobacter bacteria on chicken carcasses, using real-time PCR and propidium monoazide treatment, as a tool for quantitative risk assessment.

    Mathilde Hartmann Josefsen;Charlotta Löfström;Tina Beck Hansen;Laurids Siig Christensen

  • DNA-DNA hybridization determined in micro-wells using covalent attachment of DNA.

    Henrik Christensen;OØystein Angen;Reinier Mutters;John E. Olsen

  • Genetic relationships among avian isolates classified as Pasteurella haemolytica, 'Actinobacillus salpingitidis' or Pasteurella anatis with proposal of Gallibacterium anatis gen. nov., comb. nov. and description of additional genomospecies within Gallibacterium gen. nov.

    Henrik Christensen;Magne Bisgaard;Anders Miki Bojesen;Reinier Mutters

  • Productivity of local chickens under village management conditions.

    N.A. Mwalusanya;A.M. Katule;S.K. Mutayoba;M.M.A. Mtambo

  • Role of Flagellin and the Two-Component CheA/CheY System of Listeria monocytogenes in Host Cell Invasion and Virulence

    Lone Dons;Emma Eriksson;Yuxuan Jin;Martin E. Rottenberg

  • Differentiation of Shewanella putrefaciens and Shewanella alga on the basis of whole-cell protein profiles, ribotyping, phenotypic characterization, and 16S rRNA gene sequence analysis.

    Birte Fonnesbech Vogel;Kirsten Jørgensen;Henrik Christensen;John Elmerdahl Olsen

  • Bacterial decimation times in anaerobic digestions of animal slurries

    John Elmerdahl Olsen;Holger Errebo Larsen

  • Comparative phylogenies of the housekeeping genes atpD, infB and rpoB and the 16S rRNA gene within the Pasteurellaceae.

    Henrik Christensen;Peter Kuhnert;John Elmerdahl Olsen;Magne Bisgaard

  • Cloning and characterization of a gene encoding flagellin of Listeria monocytogenes

    L. Dons;O.F. Rasmussen;J.E. Olsen

  • Polyamines are required for virulence in Salmonella enterica serovar Typhimurium.

    Lotte Jelsbak;Line Elnif Thomsen;Inke Wallrodt;Peter Ruhdal Jensen

  • Cross‐contamination with Salmonella on a broiler slaughterhouse line demonstrated by use of epidemiological markers

    J.E. Olsen;D.J. Brown;M. Madsen;M. Bisgaard

  • Is characterization of a single isolate sufficient for valid publication of a new genus or species? Proposal to modify recommendation 30b of the Bacteriological Code (1990 Revision).

    Henrik Christensen;Magne Bisgaard;Wilhelm Frederiksen;Reinier Mutters

Frequent Co-Authors

Magne Bisgaard
Magne Bisgaard Bisgaard Consulting
Henrik Christensen
Henrik Christensen University of Copenhagen
Anders Dalsgaard
Anders Dalsgaard University of Copenhagen
Jens Peter Christensen
Jens Peter Christensen University of Copenhagen
Derek J. Brown
Derek J. Brown Stobhill Hospital
Luca Guardabassi
Luca Guardabassi University of Copenhagen
Frank Møller Aarestrup
Frank Møller Aarestrup Technical University of Denmark
Dorte Lau Baggesen
Dorte Lau Baggesen Technical University of Denmark
Søren Saxmose Nielsen
Søren Saxmose Nielsen University of Copenhagen
Karl Pedersen
Karl Pedersen Aarhus University

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