World's Best Scientists 2026 revealed!
Richard J. Hollis

Richard J. Hollis

D-Index & Metrics

Microbiology

D-Index
81
Citations
18580
World Ranking
1126
National Ranking
511

Richard J. Hollis 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 Richard J. Hollis 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: 156 publications — 29th percentile

29% of scientists in this discipline score the same or lower.

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

Richard J. Hollis 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 Richard J. Hollis 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: 81 D-Index — 81st percentile

81% of scientists in this discipline score the same or lower.

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

Overview

Richard J. Hollis is affiliated with the University of Iowa in the United States. Their research spans several fields within medicine and psychology, with a particular focus on Emergency Medical Services, Infectious Diseases, Applied Microbiology and Biotechnology, Dermatology, and Rehabilitation.

Their scholarly work addresses a range of topics including Central Venous Catheters and Hemodialysis, Antifungal Resistance and Susceptibility, Antibiotic Use and Resistance, Dermatologic Treatments and Research, Wound Healing and Treatments, Surgical Sutures and Adhesives, and LGBTQ Health, Identity, and Policy.

Recent publications by Richard J. Hollis include:

  • "A multi-center outbreak of Candida tropicalis bloodstream infections associated with contaminated hemodialysis machine prime buckets," 2021, American Journal of Infection Control
  • "Unequal healing: Racial differences in hypertrophic scarring following burn injuries," 2025, Journal of the National Medical Association
  • "Racial and Ethnic Disparities in Utilization of Top and Bottom Gender Affirming Surgeries Among Eligible Transgender Adults," 2025, Plastic Surgery

Frequent collaborators in their research activities have included:

  • Joshua E Lewis
  • John M. Boyce
  • Diane G. Dumigan
  • Nancy L. Havill
  • Michael A. Pfaller

Their contributions have been published primarily in the following venues:

  • American Journal of Infection Control
  • Journal of the National Medical Association
  • Plastic Surgery

Best Publications

  • International surveillance of bloodstream infections due to Candida species: frequency of occurrence and in vitro susceptibilities to fluconazole, ravuconazole, and voriconazole of isolates collected from 1997 through 1999 in the SENTRY antimicrobial surveillance program.

    M. A. Pfaller;D. J. Diekema;R. N. Jones;H. S. Sader

  • Antifungal Susceptibilities of Candida Species Causing Vulvovaginitis and Epidemiology of Recurrent Cases

    Sandra S. Richter;Rudolph P. Galask;Shawn A. Messer;Richard J. Hollis

  • Antifungal activities of posaconazole, ravuconazole, and voriconazole compared to those of itraconazole and amphotericin B against 239 clinical isolates of Aspergillus spp. and other filamentous fungi: report from SENTRY Antimicrobial Surveillance Program, 2000.

    M. A. Pfaller;S. A. Messer;R. J. Hollis;R. N. Jones

  • In Vitro Susceptibility of Invasive Isolates of Candida spp. to Anidulafungin, Caspofungin, and Micafungin: Six Years of Global Surveillance

    M. A. Pfaller;L. Boyken;R. J. Hollis;J. Kroeger

  • Bloodstream Infections Due to Candida Species: SENTRY Antimicrobial Surveillance Program in North America and Latin America, 1997-1998

    Pfaller;R N Jones;G V Doern;H S Sader

  • Activities of caspofungin, itraconazole, posaconazole, ravuconazole, voriconazole, and amphotericin B against 448 recent clinical isolates of filamentous fungi

    D. J. Diekema;S. A. Messer;R. J. Hollis;R. N. Jones

  • Elimination of coincident Staphylococcus aureus nasal and hand carriage with intranasal application of mupirocin calcium ointment

    David R. Reagan;Bradley N. Doebbeling;Michael A. Pfaller;Carol T. Sheetz

  • Trends in Antifungal Susceptibility of Candida spp. Isolated from Pediatric and Adult Patients with Bloodstream Infections: SENTRY Antimicrobial Surveillance Program, 1997 to 2000

    M. A. Pfaller;D. J. Diekema;R. N. Jones;S. A. Messer

  • International Surveillance of Bloodstream Infections Due to Candida Species: Frequency of Occurrence and Antifungal Susceptibilities of Isolates Collected in 1997 in the United States, Canada, and South America for the SENTRY Program

    M. A. Pfaller;R. N. Jones;G. V. Doern;H. S. Sader

  • Methicillin-resistant Staphylococcus aureus outbreak in a veterinary teaching hospital: potential human-to-animal transmission.

    Jennifer C. Seguin;Robert D. Walker;John P. Caron;Wesley E. Kloos

  • International surveillance of blood stream infections due to Candida species in the European SENTRY program: species distribution and antifungal susceptibility including the investigational triazole and echinocandin agents

    M.A Pfaller;R.N Jones;G.V Doern;A.C Fluit

  • In vitro activities of voriconazole, posaconazole, and fluconazole against 4,169 clinical isolates of Candida spp. and Cryptococcus neoformans collected during 2001 and 2002 in the ARTEMIS global antifungal surveillance program

    M.A Pfaller;S.A Messer;L Boyken;R.J Hollis

  • In Vitro Activities of Ravuconazole and Voriconazole Compared with Those of Four Approved Systemic Antifungal Agents against 6,970 Clinical Isolates of Candida spp.

    M. A. Pfaller;S. A. Messer;R. J. Hollis;R. N. Jones

  • Trends in species distribution and susceptibility to fluconazole among blood stream isolates of Candida species in the United States.

    M.A Pfaller;S.A Messer;R.J Hollis;R.N Jones

  • Characterization of the sequence of colonization and nosocomial candidemia using DNA fingerprinting and a DNA probe.

    D R Reagan;M A Pfaller;R J Hollis;R P Wenzel

  • Investigation of the sequence of colonization and candidemia in nonneutropenic patients.

    A Voss;R J Hollis;M A Pfaller;R P Wenzel

  • Activities of Fluconazole and Voriconazole against 1,586 Recent Clinical Isolates of Candida Species Determined by Broth Microdilution, Disk Diffusion, and Etest Methods: Report from The ARTEMIS Global Antifungal Susceptibility Program, 2001

    M. A. Pfaller;D. J. Diekema;S. A. Messer;L. Boyken

  • Food-initiated outbreak of methicillin-resistant Staphylococcus aureus analyzed by pheno- and genotyping.

    J Kluytmans;W van Leeuwen;W Goessens;R Hollis

  • Geographic Variation in the Susceptibilities of Invasive Isolates of Candida glabrata to Seven Systemically Active Antifungal Agents: a Global Assessment from the ARTEMIS Antifungal Surveillance Program Conducted in 2001 and 2002

    M. A. Pfaller;S. A. Messer;L. Boyken;S. Tendolkar

  • In Vitro Susceptibilities of Candida spp. to Caspofungin: Four Years of Global Surveillance

    M. A. Pfaller;L. Boyken;R. J. Hollis;S. A. Messer

  • Bloodstream Infections Due to Candida Species: SENTRY Antimicrobial Surveillance Program in North America

    M. A. Pfaller;R. N. Jones;G. V. Doern

Frequent Co-Authors

Shawn A. Messer
Shawn A. Messer Oregon Health & Science University
Michael A. Pfaller
Michael A. Pfaller JMI Laboratories
Daniel J. Diekema
Daniel J. Diekema University of Iowa Hospitals and Clinics
Richard P. Wenzel
Richard P. Wenzel Virginia Commonwealth University
Ronald N. Jones
Ronald N. Jones JMI Laboratories
Gary V. Doern
Gary V. Doern University of Iowa
Helio S. Sader
Helio S. Sader JMI Laboratories
Andreas Voss
Andreas Voss Heidelberg University
Andreas F. Widmer
Andreas F. Widmer University Hospital of Basel
Ana Espinel-Ingroff
Ana Espinel-Ingroff Virginia Commonwealth University Medical Center

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