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2026

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Best Scientists

D-Index
181
Citations
130185
World Ranking
598
National Ranking
375

Genetics

D-Index
176
Citations
124042
World Ranking
53
National Ranking
31

Medicine

D-Index
179
Citations
128592
World Ranking
378
National Ranking
239

Stephen J. O'Brien publication distribution in Genetics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Genetics in 2026. The highlighted bar marks where Stephen J. O'Brien sits on this spectrum.

45–54 publications: 6 scientists 55–64 publications: 10 scientists 65–74 publications: 35 scientists 75–84 publications: 84 scientists 85–94 publications: 102 scientists 95–104 publications: 151 scientists 105–114 publications: 175 scientists 115–124 publications: 203 scientists 125–134 publications: 217 scientists 135–144 publications: 205 scientists 145–154 publications: 193 scientists 155–164 publications: 188 scientists 165–174 publications: 170 scientists 175–184 publications: 178 scientists 185–194 publications: 164 scientists 195–204 publications: 173 scientists 205–214 publications: 159 scientists 215–224 publications: 134 scientists 225–234 publications: 143 scientists 235–244 publications: 105 scientists 245–254 publications: 114 scientists 255–264 publications: 92 scientists 265–274 publications: 88 scientists 275–284 publications: 87 scientists 285–294 publications: 80 scientists 295–304 publications: 62 scientists 305–314 publications: 75 scientists 315–324 publications: 67 scientists 325–334 publications: 60 scientists 335–344 publications: 52 scientists 345–354 publications: 40 scientists 355–364 publications: 48 scientists 365–374 publications: 47 scientists 375–384 publications: 46 scientists 385–394 publications: 31 scientists 395–404 publications: 27 scientists 405–414 publications: 40 scientists 415–424 publications: 30 scientists 425–434 publications: 43 scientists 435–444 publications: 29 scientists 445–454 publications: 14 scientists 455–464 publications: 28 scientists 465–474 publications: 21 scientists 475–484 publications: 21 scientists 485–494 publications: 22 scientists 495–504 publications: 17 scientists 505–514 publications: 12 scientists 515–524 publications: 11 scientists 525–534 publications: 8 scientists 535–544 publications: 8 scientists 545–554 publications: 14 scientists 555–564 publications: 4 scientists 565–574 publications: 11 scientists 575–584 publications: 5 scientists 585–594 publications: 11 scientists 595–604 publications: 12 scientists 605–614 publications: 7 scientists 615–624 publications: 6 scientists 625–634 publications: 10 scientists 635–644 publications: 9 scientists 645–654 publications: 10 scientists 655–664 publications: 6 scientists 665–674 publications: 6 scientists 675–684 publications: 6 scientists 685–694 publications: 4 scientists 695–702 publications: 6 scientists 703+ publications: 100 scientists
45 publications 703+

This scientist: 964 publications — 100th percentile

100% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 703 publications or more.

Stephen J. O'Brien D-index placement in Genetics in 2026

The chart shows the D-index (discipline H-index) distribution of Genetics scientists ranked by Research.com in 2026. The highlighted bar marks where Stephen J. O'Brien sits on this spectrum.

40–41 D-Index: 24 scientists 42–43 D-Index: 52 scientists 44–45 D-Index: 84 scientists 46–47 D-Index: 112 scientists 48–49 D-Index: 118 scientists 50–51 D-Index: 141 scientists 52–53 D-Index: 143 scientists 54–55 D-Index: 145 scientists 56–57 D-Index: 179 scientists 58–59 D-Index: 162 scientists 60–61 D-Index: 175 scientists 62–63 D-Index: 191 scientists 64–65 D-Index: 172 scientists 66–67 D-Index: 184 scientists 68–69 D-Index: 164 scientists 70–71 D-Index: 158 scientists 72–73 D-Index: 150 scientists 74–75 D-Index: 136 scientists 76–77 D-Index: 127 scientists 78–79 D-Index: 127 scientists 80–81 D-Index: 111 scientists 82–83 D-Index: 110 scientists 84–85 D-Index: 110 scientists 86–87 D-Index: 84 scientists 88–89 D-Index: 102 scientists 90–91 D-Index: 66 scientists 92–93 D-Index: 72 scientists 94–95 D-Index: 70 scientists 96–97 D-Index: 54 scientists 98–99 D-Index: 60 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 55 scientists 104–105 D-Index: 45 scientists 106–107 D-Index: 42 scientists 108–109 D-Index: 28 scientists 110–111 D-Index: 39 scientists 112–113 D-Index: 25 scientists 114–115 D-Index: 31 scientists 116–117 D-Index: 29 scientists 118–119 D-Index: 34 scientists 120–121 D-Index: 29 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 18 scientists 126–127 D-Index: 27 scientists 128–129 D-Index: 22 scientists 130–131 D-Index: 16 scientists 132–133 D-Index: 11 scientists 134–135 D-Index: 17 scientists 136–137 D-Index: 12 scientists 138–139 D-Index: 21 scientists 140–141 D-Index: 4 scientists 142–143 D-Index: 9 scientists 144–145 D-Index: 14 scientists 146–147 D-Index: 6 scientists 148–149 D-Index: 10 scientists 150–151 D-Index: 7 scientists 152–153 D-Index: 9 scientists 154–155 D-Index: 8 scientists 156–157 D-Index: 8 scientists 158–159 D-Index: 9 scientists 160+ D-Index: 96 scientists
40 D-Index 160+

This scientist: 176 D-Index — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 160 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Genetics in United States Leader Award
  • 2025 - Research.com Best Scientists Award
  • 2025 - Research.com Genetics in United States Leader Award
  • 2024 - Research.com Genetics in United States Leader Award
  • 2024 - Research.com Genetics and Molecular Biology in Russia Leader Award
  • 2023 - Research.com Genetics in United States Leader Award
  • 2022 - Research.com Genetics and Molecular Biology in Russia Leader Award

Overview

Stephen J. O'Brien is affiliated with Nova Southeastern University in the United States. Their research primarily spans the fields of Biochemistry, Genetics and Molecular Biology, with a significant focus on Medicine. Within these domains, their work emphasizes subfields such as Genetics, Molecular Biology, Ecology, Infectious Diseases, and Virology.

The main topics explored by Stephen J. O'Brien include genetic diversity and population structure, wildlife ecology and conservation, HIV research and treatment, genomics and phylogenetic studies, human-animal interaction studies, HIV/AIDS drug development and treatment, and hepatitis B virus studies.

Recent publications reflect a diverse range of interests and contributions to genomic and ecological research:

  • Genomic Adaptations and Evolutionary History of the Extinct Scimitar-Toothed Cat, Homotherium latidens (2020) in Current Biology
  • African and Asian leopards are highly differentiated at the genomic level (2021) in Current Biology
  • Genomic evidence for the Chinese mountain cat as a wildcat conspecific (Felis silvestris bieti) and its introgression to domestic cats (2021) in Science Advances
  • Single-haplotype comparative genomics provides insights into lineage-specific structural variation during cat evolution (2023) in Nature Genetics
  • Are pangolins scapegoats of the COVID-19 outbreak-CoV transmission and pathology evidence? (2020) in Conservation Letters

Stephen J. O'Brien frequently collaborates with the following coauthors:

  • Shu-Jin Luo
  • Agostinho Antunes
  • Klaus-Peter Koepfli
  • Nobuyuki Yamaguchi
  • Yan Zhuang

The scientist's work has been published primarily in the following venues:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Current Biology
  • Nature Ecology & Evolution
  • Proceedings of the National Academy of Sciences
  • Journal of Heredity

Best Publications

  • Genetic Restriction of HIV-1 Infection and Progression to AIDS by a Deletion Allele of the CKR5 Structural Gene

    Michael Dean;Mary Carrington;Cheryl Winkler;Gavin A. Huttley

  • Towards complete and error-free genome assemblies of all vertebrate species

    Arang Rhie;Shane A. McCarthy;Shane A. McCarthy;Olivier Fedrigo;Joana Damas

  • Whole-genome analyses resolve early branches in the tree of life of modern birds

    Erich D. Jarvis;Siavash Mirarab;Andre J. Aberer;Bo Li;Bo Li;Bo Li

  • Resolution of the early placental mammal radiation using Bayesian phylogenetics

    William J. Murphy;Eduardo Eizirik;Eduardo Eizirik;Stephen J. O'Brien;Ole Madsen

  • Molecular phylogenetics and the origins of placental mammals

    William J. Murphy;Eduardo Eizirik;Eduardo Eizirik;Warren E. Johnson;Ya Ping Zhang

  • HLA and HIV-1: heterozygote advantage and B*35-Cw*04 disadvantage.

    Mary Carrington;George W. Nelson;Maureen P. Martin;Teri Kissner

  • A Molecular Phylogeny of Living Primates

    Polina L. Perelman;Warren E. Johnson;Christian Roos;Hector Seuanez

  • Epistatic interaction between KIR3DS1 and HLA-B delays the progression to AIDS

    Maureen P. Martin;Xiaojiang Gao;Jeong Hee Lee;George W. Nelson

  • HLA and NK Cell Inhibitory Receptor Genes in Resolving Hepatitis C Virus Infection

    Salim I. Khakoo;Chloe L. Thio;Maureen P. Martin;Collin R. Brooks

  • A molecular phylogeny for bats illuminates biogeography and the fossil record.

    Emma C. Teeling;Emma C. Teeling;Mark S. Springer;Ole Madsen;Paul Bates

  • Influence of combinations of human major histocompatibility complex genes on the course of HIV–1 infection

    Richard A. Kaslow;Mary Carrington;R. Apple;L. Park

  • Comparative genomics reveals insights into avian genome evolution and adaptation.

    Guojie Zhang;Guojie Zhang;Cai Li;Qiye Li;Bo Li

  • Genetic basis for species vulnerability in the Cheetah

    Stephen J. O'Brien;M. E. Roelke;L. Marker;A. Newman

  • Contrasting Genetic Influence of CCR2 and CCR5 Variants on HIV-1 Infection and Disease Progression

    Michael W. Smith;Michael Dean;Mary Carrington;Cheryl Winkler

  • Evaluation and Integration of Genetic Signature for Prediction Risk of Nasopharyngeal Carcinoma in Southern China

    Xiuchan Guo;Cheryl A. Winkler;Ji Li;Li Guan

  • The Influence of HLA Genotype on AIDS

    Mary Carrington;Stephen J. O'Brien

  • Placental mammal diversification and the Cretaceous–Tertiary boundary

    Mark S. Springer;William J. Murphy;Eduardo Eizirik;Stephen J. O'Brien

  • A canine distemper virus epidemic in Serengeti lions ( Panthera leo )

    Melody E. Roelke-Parker;Linda Munson;Craig Packer;Richard Kock

  • Genetic Restriction of AIDS Pathogenesis by an SDF-1 Chemokine Gene Variant

    Cheryl Winkler;William Modi;Michael W. Smith;George W. Nelson

  • Towards complete and error-free genome assemblies of all vertebrate species

    Arang Rhie;Shane A. McCarthy;Olivier Fedrigo;Joana Damas

Frequent Co-Authors

Warren E. Johnson
Warren E. Johnson Smithsonian Conservation Biology Institute
Mary Carrington
Mary Carrington Ragon Institute of MGH, MIT and Harvard
Russell F. Warren
Russell F. Warren Hospital for Special Surgery
William J. Murphy
William J. Murphy Texas A&M University
Agostinho Antunes
Agostinho Antunes University of Porto
Cheryl A. Winkler
Cheryl A. Winkler National Institutes of Health
Michael W. Smith
Michael W. Smith Johns Hopkins University
James J. Goedert
James J. Goedert National Institutes of Health
Eduardo Eizirik
Eduardo Eizirik Pontifical Catholic University of Rio Grande do Sul
David Vlahov
David Vlahov Yale University

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