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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 51 4349 4001 1680 1504 214 8718

Allen L. Richards publications per year

The chart shows the history of publications by Allen L. Richards between 1988 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Allen L. Richards published across 38 years, from 1988 to 2025, averaging 5.9 papers a year. Output peaked at 19 publications in 2018. 6 of the 223 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1988 to 2025. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 2018. 1988: 2 publications 1989: 0 publications 1990: 0 publications 1991: 1 publication 1992: 0 publications 1993: 2 publications 1994: 1 publication 1995: 3 publications 1996: 3 publications 1997: 6 publications 1998: 3 publications 1999: 0 publications 2000: 1 publication 2001: 0 publications 2002: 3 publications 2003: 4 publications 2004: 6 publications 2005: 8 publications 2006: 3 publications 2007: 7 publications 2008: 4 publications 2009: 0 publications 2010: 10 publications 2011: 6 publications 2012: 10 publications 2013: 15 publications 2014: 10 publications 2015: 15 publications 2016: 18 publications 2017: 11 publications 2018: 19 publications 2019: 14 publications 2020: 12 publications 2021: 12 publications 2022: 6 publications 2023: 2 publications 2024: 5 publications 2025: 1 publication
1988 2025

223 publications in total across all disciplines

View publications per year as a table
Allen L. Richards: publications per year, 1988 to 2025
Year Publications
1988 2
1989 0
1990 0
1991 1
1992 0
1993 2
1994 1
1995 3
1996 3
1997 6
1998 3
1999 0
2000 1
2001 0
2002 3
2003 4
2004 6
2005 8
2006 3
2007 7
2008 4
2009 0
2010 10
2011 6
2012 10
2013 15
2014 10
2015 15
2016 18
2017 11
2018 19
2019 14
2020 12
2021 12
2022 6
2023 2
2024 5
2025 1
Total 223
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Allen L. Richards 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 Allen L. Richards sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 205–214 publications, is where this scientist sits. 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
55–64 publications 679+

This scientist: 214 publications — 54th percentile

54% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234
205–214 208 214
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146
265–274 139
275–284 148
285–294 115
295–304 96
305–314 88
315–324 106
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
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Allen L. Richards 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 Allen L. Richards sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 51 D-Index, is where this scientist sits. 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: 51 D-Index — 23rd percentile

23% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111 51
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151
60 139
61 123
62 126
63 144
64 109
65 103
66 124
67 112
68 103
69 131
70 94
71 93
72 96
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34
92 27
93 26
94 33
95 22
96 37
97 22
98 21
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
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Overview

Allen L. Richards is affiliated with the Naval Medical Research Center in the United States and has contributed extensively to the fields of Immunology and Microbiology as well as Medicine. Their research mainly focuses on parasitology, infectious diseases, public health, environmental and occupational health, ecology, evolution, behavior, systematics, and genetics.

The scientist's body of work is centered predominantly on vector-borne infectious diseases, viral infections and vectors, mosquito-borne diseases and control, vector-borne animal diseases, research involving Yersinia bacterium, plague, and ectoparasites, dermatological diseases and infestations, as well as parasites and host interactions.

Recent publications authored or coauthored by Allen L. Richards include:

  • Molecular Description of a Novel Orientia Species Causing Scrub Typhus in Chile, 2020, Emerging Infectious Diseases
  • Scrub Typhus: Historic Perspective and Current Status of the Worldwide Presence of Orientia Species, 2020, Tropical Medicine and Infectious Disease
  • Identification of trombiculid mites (Acari: Trombiculidae) on rodents from Chiloé Island and molecular evidence of infection with Orientia species, 2020, PLoS Neglected Tropical Diseases
  • Exploring the Niche of Rickettsia montanensis (Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae), Using Multiple Species Distribution Model Approaches, 2020, Journal of Medical Entomology
  • A time-course comparative clinical and immune response evaluation study between the human pathogenic Orientia tsutsugamushi strains: Karp and Gilliam in a rhesus macaque (Macaca mulatta) model, 2022, PLoS Neglected Tropical Diseases

Allen L. Richards collaborates frequently with several researchers, including:

  • Ju Jiang (16 joint publications)
  • Christina M. Farris (14 joint publications)
  • Thomas Weitzel (6 joint publications)
  • Katia Abarca (5 joint publications)
  • Constanza Martínez-Valdebenito (5 joint publications)

The scientist often publishes in the following venues:

  • PLoS Neglected Tropical Diseases (5 publications)
  • Vector-Borne and Zoonotic Diseases (5 publications)
  • Tropical Medicine and Infectious Disease (4 publications)
  • Journal of Medical Entomology (4 publications)
  • Ticks and Tick-borne Diseases (3 publications)

Best Publications

  • Scrub Typhus: The Geographic Distribution of Phenotypic and Genotypic Variants of Orientia tsutsugamushi

    Daryl J. Kelly;Paul A. Fuerst;Wei-Mei Ching;Allen L. Richards;Allen L. Richards

  • Isolation of a Novel Orientia Species (O. chuto sp. nov.) from a Patient Infected in Dubai

    Leonard Izzard;Leonard Izzard;Andrew Fuller;Stuart D. Blacksell;Stuart D. Blacksell;Daniel H. Paris;Daniel H. Paris

  • DEVELOPMENT OF A QUANTITATIVE REAL-TIME POLYMERASE CHAIN REACTION ASSAY SPECIFIC FOR ORIENTIA TSUTSUGAMUSHI

    Ju Jiang;Teik-Chye Chan;Joseph J. Temenak;Gregory A. Dasch

  • The past and present threat of rickettsial diseases to military medicine and international public health.

    Daryl J. Kelly;Allen L. Richards;Allen L. Richards;Joseph Temenak;Daniel Strickman

  • A Review of Scrub Typhus (Orientia tsutsugamushi and Related Organisms): Then, Now, and Tomorrow.

    Alison Luce-Fedrow;Marcie L. Lehman;Daryl J. Kelly;Kristin Mullins

  • Tumor necrosis factor induction by Candida albicans from human natural killer cells and monocytes.

    J Y Djeu;D K Blanchard;A L Richards;H Friedman

  • Characterization of Spotted Fever Group Rickettsiae in Flea and Tick Specimens from Northern Peru

    Patrick J. Blair;Ju Jiang;George B. Schoeler;Cecilia Moron

  • Comparative evaluation of selected diagnostic assays for the detection of IgG and IgM antibody to Orientia tsutsugamushi in Thailand.

    Russell E Coleman;Vichai Sangkasuwan;Nantavadee Suwanabun;Chirapa Eamsila

  • HLA-DR-Promiscuous T Cell Epitopes from Plasmodium falciparum Pre-Erythrocytic-Stage Antigens Restricted by Multiple HLA Class II Alleles

    Denise L. Doolan;Scott Southwood;Robert Chesnut;Ettore Appella

  • Randomised placebo-controlled trial of primaquine for prophylaxis of falciparum and vivax malaria

    D. Fryauff;K. Baird;H. Basri;I. Sumawinata

  • Detection of Rickettsia parkeri and Candidatus Rickettsia andeanae in Amblyomma maculatum Gulf Coast Ticks Collected from Humans in the United States

    Ju Jiang;Ellen Y Stromdahl;Allen L Richards

  • Endemic scrub typhus-like illness, Chile.

    M E Balcells;Ricardo Rabagliati;Patricia Garcia;Helena Poggi

  • Human Infection with Rickettsia felis, Kenya

    Allen L Richards;Ju Jiang;Sylvia A Omulo;Ryan Dare

  • Infrequency of Rickettsia rickettsii in Dermacentor variabilis removed from humans, with comments on the role of other human-biting ticks associated with spotted fever group Rickettsiae in the United States.

    Ellen Y. Stromdahl;Ju Jiang;Mary Vince;Allen L. Richards

  • Rickettsia parkeri infection after tick bite, Virginia.

    Timothy J. Whitman;Allen L. Richards;Christopher D. Paddock;Cindy L. Tamminga

  • Scrub Typhus: No Longer Restricted to the Tsutsugamushi Triangle

    Ju Jiang;Allen L Richards

  • Development of quantitative real-time PCR assays to detect Rickettsia typhi and Rickettsia felis, the causative agents of murine typhus and flea-borne spotted fever.

    Katherine M. Henry;Ju Jiang;Patrick J. Rozmajzl;Abdu F. Azad

  • Coxiella burnetii in humans, domestic ruminants, and ticks in rural western Kenya.

    Darryn Leslie Knobel;Alice N. Maina;Sally J. Cutler;Eric Ogola

  • Strategies for detecting rickettsiae and diagnosing rickettsial diseases

    Alison Luce-Fedrow;Kristin Mullins;Kristin Mullins;Alex P Kostik;Alex P Kostik;Heidi K St John

  • Scrub typhus vaccines: past history and recent developments.

    Suchismita Chattopadhyay;Allen L. Richards

  • Molecular detection of Rickettsia felis and Candidatus Rickettsia Asemboensis in Fleas from Human Habitats, Asembo, Kenya

    Ju Jiang;Alice N. Maina;Darryn Leslie Knobel;Sarah Cleaveland

  • Rickettsia felis infection in febrile patients, western Kenya, 2007-2010.

    Alice N. Maina;Alice N. Maina;Darryn Leslie Knobel;Darryn Leslie Knobel;Ju Jiang;Jo E.B. Halliday

  • Molecular Detection of Rickettsia amblyommii in Amblyomma americanum Parasitizing Humans

    Ju Jiang;Tamasin Yarina;Melissa K Miller;Ellen Y Stromdahl

  • Q Fever, Scrub Typhus, and Rickettsial Diseases in Children, Kenya, 2011-2012

    Alice N. Maina;Christina M. Farris;Antony Odhiambo;Ju Jiang

Frequent Co-Authors

Terry A. Klein
Terry A. Klein United States Department of the Army
Gregory A. Dasch
Gregory A. Dasch Centers for Disease Control and Prevention
Darryn L. Knobel
Darryn L. Knobel Ross University School of Veterinary Medicine
Stuart D. Blacksell
Stuart D. Blacksell Mahidol University
Robert F. Breiman
Robert F. Breiman Emory University
Nicholas P. J. Day
Nicholas P. J. Day University of Oxford
Sadie J. Ryan
Sadie J. Ryan University of Florida
James G. Olson
James G. Olson Naval Medical Research Center
M. Kariuki Njenga
M. Kariuki Njenga Washington State University
Sarah Cleaveland
Sarah Cleaveland University of Glasgow

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