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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Immunology 57 3652 3368 1685 1542 142 8921

Gregory T. Spear publications per year

The chart shows the history of publications by Gregory T. Spear between 1979 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Gregory T. Spear published across 43 years, from 1979 to 2021, averaging 3.3 papers a year. Output peaked at 9 publications in 2011. 1 of the 141 publications appeared in the last two years.

No. of publications
2 4 6 8
Bar chart. Horizontal axis: year, 1979 to 2021. Vertical axis: number of publications, 0 to 9. Peak 9 publications in 2011. 1979: 1 publication 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 1 publication 1985: 0 publications 1986: 2 publications 1987: 0 publications 1988: 3 publications 1989: 2 publications 1990: 4 publications 1991: 4 publications 1992: 1 publication 1993: 4 publications 1994: 2 publications 1995: 7 publications 1996: 2 publications 1997: 4 publications 1998: 7 publications 1999: 5 publications 2000: 8 publications 2001: 6 publications 2002: 4 publications 2003: 2 publications 2004: 4 publications 2005: 8 publications 2006: 2 publications 2007: 8 publications 2008: 6 publications 2009: 2 publications 2010: 4 publications 2011: 9 publications 2012: 9 publications 2013: 5 publications 2014: 4 publications 2015: 7 publications 2016: 3 publications 2017: 0 publications 2018: 0 publications 2019: 0 publications 2020: 0 publications 2021: 1 publication
1979 2021

141 publications in total across all disciplines

View publications per year as a table
Gregory T. Spear: publications per year, 1979 to 2021
Year Publications
1979 1
1980 0
1981 0
1982 0
1983 0
1984 1
1985 0
1986 2
1987 0
1988 3
1989 2
1990 4
1991 4
1992 1
1993 4
1994 2
1995 7
1996 2
1997 4
1998 7
1999 5
2000 8
2001 6
2002 4
2003 2
2004 4
2005 8
2006 2
2007 8
2008 6
2009 2
2010 4
2011 9
2012 9
2013 5
2014 4
2015 7
2016 3
2017 0
2018 0
2019 0
2020 0
2021 1
Total 141
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Gregory T. Spear publication distribution in Immunology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Immunology in 2026. The highlighted bar marks where Gregory T. Spear sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 76 bars. Horizontal axis: publications, 62–71 to 807+. Vertical axis: number of scientists, 0 to 189. Most scientists, 189, have 152–161 publications. The last bar groups every scientist with 807 publications or more. The highlighted bar, 142–151 publications, is where this scientist sits. 62–71 publications: 9 scientists 72–81 publications: 23 scientists 82–91 publications: 40 scientists 92–101 publications: 72 scientists 102–111 publications: 86 scientists 112–121 publications: 108 scientists 122–131 publications: 150 scientists 132–141 publications: 160 scientists 142–151 publications: 159 scientists 152–161 publications: 189 scientists 162–171 publications: 166 scientists 172–181 publications: 181 scientists 182–191 publications: 188 scientists 192–201 publications: 187 scientists 202–211 publications: 178 scientists 212–221 publications: 158 scientists 222–231 publications: 168 scientists 232–241 publications: 159 scientists 242–251 publications: 160 scientists 252–261 publications: 148 scientists 262–271 publications: 116 scientists 272–281 publications: 125 scientists 282–291 publications: 115 scientists 292–301 publications: 111 scientists 302–311 publications: 95 scientists 312–321 publications: 97 scientists 322–331 publications: 97 scientists 332–341 publications: 99 scientists 342–351 publications: 96 scientists 352–361 publications: 69 scientists 362–371 publications: 76 scientists 372–381 publications: 71 scientists 382–391 publications: 71 scientists 392–401 publications: 62 scientists 402–411 publications: 54 scientists 412–421 publications: 41 scientists 422–431 publications: 63 scientists 432–441 publications: 53 scientists 442–451 publications: 31 scientists 452–461 publications: 42 scientists 462–471 publications: 40 scientists 472–481 publications: 29 scientists 482–491 publications: 34 scientists 492–501 publications: 30 scientists 502–511 publications: 23 scientists 512–521 publications: 41 scientists 522–531 publications: 29 scientists 532–541 publications: 28 scientists 542–551 publications: 16 scientists 552–561 publications: 18 scientists 562–571 publications: 18 scientists 572–581 publications: 17 scientists 582–591 publications: 17 scientists 592–601 publications: 17 scientists 602–611 publications: 19 scientists 612–621 publications: 13 scientists 622–631 publications: 12 scientists 632–641 publications: 11 scientists 642–651 publications: 16 scientists 652–661 publications: 9 scientists 662–671 publications: 5 scientists 672–681 publications: 13 scientists 682–691 publications: 12 scientists 692–701 publications: 6 scientists 702–711 publications: 6 scientists 712–721 publications: 9 scientists 722–731 publications: 9 scientists 732–741 publications: 6 scientists 742–751 publications: 11 scientists 752–761 publications: 10 scientists 762–771 publications: 7 scientists 772–781 publications: 12 scientists 782–791 publications: 7 scientists 792–801 publications: 5 scientists 802–806 publications: 1 scientist 807+ publications: 100 scientists
62–71 publications 807+

This scientist: 142 publications — 13th percentile

13% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 807 publications or more.

View publications distribution as a table
Number of Immunology scientists by publication count, Research.com 2026 ranking edition. Based on 4,929 ranked scientists.
Publications Scientists This scientist
62–71 9
72–81 23
82–91 40
92–101 72
102–111 86
112–121 108
122–131 150
132–141 160
142–151 159 142
152–161 189
162–171 166
172–181 181
182–191 188
192–201 187
202–211 178
212–221 158
222–231 168
232–241 159
242–251 160
252–261 148
262–271 116
272–281 125
282–291 115
292–301 111
302–311 95
312–321 97
322–331 97
332–341 99
342–351 96
352–361 69
362–371 76
372–381 71
382–391 71
392–401 62
402–411 54
412–421 41
422–431 63
432–441 53
442–451 31
452–461 42
462–471 40
472–481 29
482–491 34
492–501 30
502–511 23
512–521 41
522–531 29
532–541 28
542–551 16
552–561 18
562–571 18
572–581 17
582–591 17
592–601 17
602–611 19
612–621 13
622–631 12
632–641 11
642–651 16
652–661 9
662–671 5
672–681 13
682–691 12
692–701 6
702–711 6
712–721 9
722–731 9
732–741 6
742–751 11
752–761 10
762–771 7
772–781 12
782–791 7
792–801 5
802–806 1
807+ 100
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Gregory T. Spear D-index placement in Immunology in 2026

The chart shows the D-index (discipline H-index) distribution of Immunology scientists ranked by Research.com in 2026. The highlighted bar marks where Gregory T. Spear sits on this spectrum.

No. of scientists
50 100 150 200
Bar chart with 60 bars. Horizontal axis: D-Index, 40–41 to 157+. Vertical axis: number of scientists, 0 to 201. Most scientists, 201, have 58–59 D-Index. The last bar groups every scientist with 157 D-Index or more. The highlighted bar, 56–57 D-Index, is where this scientist sits. 40–41 D-Index: 28 scientists 42–43 D-Index: 91 scientists 44–45 D-Index: 157 scientists 46–47 D-Index: 192 scientists 48–49 D-Index: 175 scientists 50–51 D-Index: 188 scientists 52–53 D-Index: 177 scientists 54–55 D-Index: 155 scientists 56–57 D-Index: 194 scientists 58–59 D-Index: 201 scientists 60–61 D-Index: 197 scientists 62–63 D-Index: 201 scientists 64–65 D-Index: 173 scientists 66–67 D-Index: 167 scientists 68–69 D-Index: 172 scientists 70–71 D-Index: 199 scientists 72–73 D-Index: 184 scientists 74–75 D-Index: 133 scientists 76–77 D-Index: 163 scientists 78–79 D-Index: 127 scientists 80–81 D-Index: 121 scientists 82–83 D-Index: 125 scientists 84–85 D-Index: 121 scientists 86–87 D-Index: 102 scientists 88–89 D-Index: 96 scientists 90–91 D-Index: 75 scientists 92–93 D-Index: 72 scientists 94–95 D-Index: 74 scientists 96–97 D-Index: 66 scientists 98–99 D-Index: 68 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 60 scientists 104–105 D-Index: 54 scientists 106–107 D-Index: 36 scientists 108–109 D-Index: 23 scientists 110–111 D-Index: 52 scientists 112–113 D-Index: 41 scientists 114–115 D-Index: 34 scientists 116–117 D-Index: 25 scientists 118–119 D-Index: 28 scientists 120–121 D-Index: 11 scientists 122–123 D-Index: 20 scientists 124–125 D-Index: 27 scientists 126–127 D-Index: 19 scientists 128–129 D-Index: 20 scientists 130–131 D-Index: 16 scientists 132–133 D-Index: 17 scientists 134–135 D-Index: 14 scientists 136–137 D-Index: 15 scientists 138–139 D-Index: 9 scientists 140–141 D-Index: 11 scientists 142–143 D-Index: 9 scientists 144–145 D-Index: 9 scientists 146–147 D-Index: 7 scientists 148–149 D-Index: 7 scientists 150–151 D-Index: 7 scientists 152–153 D-Index: 5 scientists 154–155 D-Index: 8 scientists 156 D-Index: 6 scientists 157+ D-Index: 96 scientists
40–41 D-Index 157+

This scientist: 57 D-Index — 28th percentile

28% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 157 D-Index or more.

View D-Index distribution as a table
Number of Immunology scientists by D-index, Research.com 2026 ranking edition. Based on 4,929 ranked scientists.
D-Index Scientists This scientist
40–41 28
42–43 91
44–45 157
46–47 192
48–49 175
50–51 188
52–53 177
54–55 155
56–57 194 57
58–59 201
60–61 197
62–63 201
64–65 173
66–67 167
68–69 172
70–71 199
72–73 184
74–75 133
76–77 163
78–79 127
80–81 121
82–83 125
84–85 121
86–87 102
88–89 96
90–91 75
92–93 72
94–95 74
96–97 66
98–99 68
100–101 49
102–103 60
104–105 54
106–107 36
108–109 23
110–111 52
112–113 41
114–115 34
116–117 25
118–119 28
120–121 11
122–123 20
124–125 27
126–127 19
128–129 20
130–131 16
132–133 17
134–135 14
136–137 15
138–139 9
140–141 11
142–143 9
144–145 9
146–147 7
148–149 7
150–151 7
152–153 5
154–155 8
156 6
157+ 96
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Overview

Gregory T. Spear is affiliated with Rush University Medical Center in the United States. Their research primarily spans the fields of Immunology and Microbiology, Medicine, and Health Professions, with a focus on specialized subfields including Microbiology, Rheumatology, and General Health Professions.

Their key research topics include reproductive tract infections research, pelvic floor disorders treatments, and adolescent sexual and reproductive health. These topics have been consistently explored across multiple publications.

Spear's recent research output includes the paper titled Obesity is associated with lower bacterial vaginosis prevalence in menopausal but not pre-menopausal women in a retrospective analysis of the Women's Interagency HIV Study, published in 2021 in the journal PLoS ONE. This publication has been cited multiple times, reflecting engagement with this work within the scientific community.

Frequent co-authors collaborating with Spear include:

  • Elizabeth Daubert
  • Kathleen M. Weber
  • Audrey L. French
  • Dominika Seidman
  • Katherine G. Michel

Spear's work has been published notably in the venue PLoS ONE, indicating a concentration in journals that address multidisciplinary biomedical research.

Best Publications

  • Female Genital-Tract HIV Load Correlates Inversely with Lactobacillus Species but Positively with Bacterial Vaginosis and Mycoplasma hominis

    Beverly E. Sha;M. Reza Zariffard;Qiong J. Wang;Hua Y. Chen

  • Free Glycogen in Vaginal Fluids Is Associated with Lactobacillus Colonization and Low Vaginal pH

    Paria Mirmonsef;Anna L. Hotton;Douglas Gilbert;Derick Burgad

  • Role of Virion-associated Glycosylphosphatidylinositol-linked Proteins CD55 and CD59 in Complement Resistance of Cell Line-derived and Primary Isolates of HIV-1

    Mohammed Saifuddin;Charles J. Parker;Mark E. Peeples;Miroslaw K. Gorny

  • Membrane proteins specified by herpes simplex viruses. V. Identification of an Fc-binding glycoprotein

    Unknown

  • Human immunodeficiency virus type 1 incorporates both glycosyl phosphatidylinositol-anchored CD55 and CD59 and integral membrane CD46 at levels that protect from complement-mediated destruction.

    Mohammed Saifuddin;Tarlan Hedayati;John P. Atkinson;Mark H. Holguin

  • Human α-amylase Present in Lower-Genital-Tract Mucosal Fluid Processes Glycogen to Support Vaginal Colonization by Lactobacillus

    Gregory T. Spear;Audrey L. French;Douglas Gilbert;M. Reza Zariffard

  • Host cell-derived complement control proteins CD55 and CD59 are incorporated into the virions of two unrelated enveloped viruses. Human T cell leukemia/lymphoma virus type I (HTLV-I) and human cytomegalovirus (HCMV).

    Gregory T. Spear;Nell S. Lurain;Charles J. Parker;Mahmood Ghassemi

  • Utility of Amsel criteria, Nugent score, and quantitative PCR for Gardnerella vaginalis, Mycoplasma hominis, and Lactobacillus spp. for diagnosis of bacterial vaginosis in human immunodeficiency virus-infected women.

    Beverly E. Sha;Hua Y. Chen;Qiong J. Wang;M. Reza Zariffard

  • Neuroleukin: a lymphokine product of lectin-stimulated T cells.

    Mark E. Gurney;Brian R. Apatoff;Gregory T. Spear;Mark J. Baumel

  • Mannose binding lectin (MBL) and HIV.

    Xin Ji;Henry Gewurz;Gregory T. Spear

  • Interaction of mannose-binding lectin with primary isolates of human immunodeficiency virus type 1.

    Mohammed Saifuddin;Melanie L. Hart;Henry Gewurz;Yonghong Zhang

  • Short‐Chain Fatty Acids Induce Pro‐Inflammatory Cytokine Production Alone and in Combination with Toll‐Like Receptor Ligands

    Paria Mirmonsef;Mohammad R. Zariffard;Douglas Gilbert;Hadijat Makinde

  • The effects of commensal bacteria on innate immune responses in the female genital tract.

    Paria Mirmonsef;Douglas Gilbert;Mohammad R. Zariffard;Bruce R. Hamaker

  • Detection of bacterial vaginosis-related organisms by real-time PCR for Lactobacilli, Gardnerella vaginalis and Mycoplasma hominis

    M.Reza Zariffard;Mohammed Saifuddin;Beverly E Sha;Gregory T Spear

  • Comparison of the Diversity of the Vaginal Microbiota in HIV-Infected and HIV-Uninfected Women with or without Bacterial Vaginosis

    Gregory T. Spear;Masoumeh Sikaroodi;M. Reza Zariffard;Alan L. Landay

  • Mannose-binding lectin binds to Ebola and Marburg envelope glycoproteins, resulting in blocking of virus interaction with DC-SIGN and complement-mediated virus neutralization.

    Xin Ji;Gene G. Olinger;Sheena Aris;Ying Chen

  • Activation of Human Immunodeficiency Virus Type 1 Expression by Gardnerella vaginalis

    Farhad B. Hashemi;Mahmood Ghassemi;Kenneth A. Roebuck;Gregory T. Spear

  • Characterization of Viral Dynamics in Human Immunodeficiency Virus Type 1-Infected Patients Treated with Combination Antiretroviral Therapy: Relationships to Host Factors, Cellular Restoration, and Virologic End Points

    Hulin Wu;Daniel R. Kuritzkes;Daniel R. McClernon;Harold Kessler

  • The role of bacterial vaginosis and trichomonas in HIV transmission across the female genital tract.

    Paria Mirmonsef;Laurie Krass;Alan Landay;Gregory T. Spear

  • Susceptibility of HIV-1 plasma virus to complement-mediated lysis. Evidence for a role in clearance of virus in vivo.

    B L Sullivan;E J Knopoff;M Saifuddin;D M Takefman

  • Neutralization of human immunodeficiency virus type 1 by complement occurs by viral lysis.

    G T Spear;B L Sullivan;A L Landay;T F Lint

Frequent Co-Authors

Alan L. Landay
Alan L. Landay The University of Texas Medical Branch at Galveston
Gene G. Olinger
Gene G. Olinger Boston University
Mardge H. Cohen
Mardge H. Cohen Rush University
Henry Gewurz
Henry Gewurz Rush University
Patrick M. Gillevet
Patrick M. Gillevet George Mason University
Kathryn Anastos
Kathryn Anastos Albert Einstein College of Medicine
Emmett V. Schmidt
Emmett V. Schmidt MSD (United States)
Kazue Takahashi
Kazue Takahashi Harvard University
Charles J. Parker
Charles J. Parker University of Utah
Jacques Ravel
Jacques Ravel University of Maryland, Baltimore

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