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Genetics
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2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Best Scientists 181 598 549 375 337 1144 130185
Medicine 179 378 342 239 213 1063 128592
Genetics 176 53 50 31 30 964 124042

Stephen J. O'Brien publications per year

The chart shows the history of publications by Stephen J. O'Brien between 1968 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Stephen J. O'Brien published across 58 years, from 1968 to 2025, averaging 19.8 papers a year. Output peaked at 48 publications in 2007. 2 of the 1,148 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1968 to 2025. Vertical axis: number of publications, 0 to 48. Peak 48 publications in 2007. 1968: 1 publication 1969: 1 publication 1970: 0 publications 1971: 2 publications 1972: 3 publications 1973: 3 publications 1974: 1 publication 1975: 1 publication 1976: 5 publications 1977: 3 publications 1978: 6 publications 1979: 10 publications 1980: 10 publications 1981: 3 publications 1982: 12 publications 1983: 10 publications 1984: 14 publications 1985: 12 publications 1986: 23 publications 1987: 25 publications 1988: 23 publications 1989: 28 publications 1990: 20 publications 1991: 24 publications 1992: 15 publications 1993: 25 publications 1994: 21 publications 1995: 20 publications 1996: 32 publications 1997: 33 publications 1998: 28 publications 1999: 36 publications 2000: 19 publications 2001: 33 publications 2002: 29 publications 2003: 37 publications 2004: 37 publications 2005: 31 publications 2006: 34 publications 2007: 48 publications 2008: 39 publications 2009: 41 publications 2010: 33 publications 2011: 27 publications 2012: 24 publications 2013: 31 publications 2014: 40 publications 2015: 28 publications 2016: 35 publications 2017: 23 publications 2018: 29 publications 2019: 23 publications 2020: 25 publications 2021: 25 publications 2022: 3 publications 2023: 2 publications 2024: 0 publications 2025: 2 publications
1968 2025

1,148 publications in total across all disciplines

View publications per year as a table
Stephen J. O'Brien: publications per year, 1968 to 2025
Year Publications
1968 1
1969 1
1970 0
1971 2
1972 3
1973 3
1974 1
1975 1
1976 5
1977 3
1978 6
1979 10
1980 10
1981 3
1982 12
1983 10
1984 14
1985 12
1986 23
1987 25
1988 23
1989 28
1990 20
1991 24
1992 15
1993 25
1994 21
1995 20
1996 32
1997 33
1998 28
1999 36
2000 19
2001 33
2002 29
2003 37
2004 37
2005 31
2006 34
2007 48
2008 39
2009 41
2010 33
2011 27
2012 24
2013 31
2014 40
2015 28
2016 35
2017 23
2018 29
2019 23
2020 25
2021 25
2022 3
2023 2
2024 0
2025 2
Total 1,148
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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.

No. of scientists
50 100 150 200
Bar chart with 67 bars. Horizontal axis: publications, 45–54 to 703+. Vertical axis: number of scientists, 0 to 217. Most scientists, 217, have 125–134 publications. The last bar groups every scientist with 703 publications or more. The highlighted bar, 703+ publications, is where this scientist sits. 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
45–54 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.

View publications distribution as a table
Number of Genetics scientists by publication count, Research.com 2026 ranking edition. Based on 4,342 ranked scientists.
Publications Scientists This scientist
45–54 6
55–64 10
65–74 35
75–84 84
85–94 102
95–104 151
105–114 175
115–124 203
125–134 217
135–144 205
145–154 193
155–164 188
165–174 170
175–184 178
185–194 164
195–204 173
205–214 159
215–224 134
225–234 143
235–244 105
245–254 114
255–264 92
265–274 88
275–284 87
285–294 80
295–304 62
305–314 75
315–324 67
325–334 60
335–344 52
345–354 40
355–364 48
365–374 47
375–384 46
385–394 31
395–404 27
405–414 40
415–424 30
425–434 43
435–444 29
445–454 14
455–464 28
465–474 21
475–484 21
485–494 22
495–504 17
505–514 12
515–524 11
525–534 8
535–544 8
545–554 14
555–564 4
565–574 11
575–584 5
585–594 11
595–604 12
605–614 7
615–624 6
625–634 10
635–644 9
645–654 10
655–664 6
665–674 6
675–684 6
685–694 4
695–702 6
703+ 100 964
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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.

No. of scientists
50 100 150
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 160+. Vertical axis: number of scientists, 0 to 191. Most scientists, 191, have 62–63 D-Index. The last bar groups every scientist with 160 D-Index or more. The highlighted bar, 160+ D-Index, is where this scientist sits. 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
40–41 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.

View D-Index distribution as a table
Number of Genetics scientists by D-index, Research.com 2026 ranking edition. Based on 4,342 ranked scientists.
D-Index Scientists This scientist
40–41 24
42–43 52
44–45 84
46–47 112
48–49 118
50–51 141
52–53 143
54–55 145
56–57 179
58–59 162
60–61 175
62–63 191
64–65 172
66–67 184
68–69 164
70–71 158
72–73 150
74–75 136
76–77 127
78–79 127
80–81 111
82–83 110
84–85 110
86–87 84
88–89 102
90–91 66
92–93 72
94–95 70
96–97 54
98–99 60
100–101 49
102–103 55
104–105 45
106–107 42
108–109 28
110–111 39
112–113 25
114–115 31
116–117 29
118–119 34
120–121 29
122–123 29
124–125 18
126–127 27
128–129 22
130–131 16
132–133 11
134–135 17
136–137 12
138–139 21
140–141 4
142–143 9
144–145 14
146–147 6
148–149 10
150–151 7
152–153 9
154–155 8
156–157 8
158–159 9
160+ 96 176
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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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