World's Best Scientists 2026 revealed!

D-Index & Metrics

Microbiology

D-Index
61
Citations
10959
World Ranking
3043
National Ranking
1203

Ryan K. Shields 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 Ryan K. Shields 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: 270 publications — 70th percentile

70% of scientists in this discipline score the same or lower.

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

Ryan K. Shields 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 Ryan K. Shields 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: 61 D-Index — 47th percentile

47% of scientists in this discipline score the same or lower.

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

Overview

Ryan K. Shields is affiliated with the University of Pittsburgh in the United States. Their research primarily centers on infectious diseases and antimicrobial resistance, with a significant focus on the challenges related to antibiotic-resistant bacteria.

Their recent publications reflect an engagement with critical issues in clinical microbiology and infectious diseases. Selected papers include:

  • Navigating Available Treatment Options for Carbapenem-Resistant Acinetobacter baumannii-calcoaceticus Complex Infections, 2023, Clinical Infectious Diseases
  • Clinical Evolution of AmpC-Mediated Ceftazidime-Avibactam and Cefiderocol Resistance in Enterobacter cloacae Complex Following Exposure to Cefepime, 2020, Clinical Infectious Diseases

Frequent co-authors collaborate with Shields on various research projects. Notable collaborators include:

  • Ellen G Kline
  • Daria Van Tyne
  • Yohei Doi
  • Lloyd Clarke
  • Kevin M Squires

Shields publishes frequently in several peer-reviewed journals, contributing to the following venues extensively:

  • Open Forum Infectious Diseases
  • Clinical Infectious Diseases
  • Antimicrobial Agents and Chemotherapy
  • Journal of Antimicrobial Chemotherapy
  • bioRxiv (Cold Spring Harbor Laboratory)

Their research falls within the broader fields of Medicine and Biochemistry, Genetics and Molecular Biology. More specifically, their subfields of focus include:

  • Molecular Medicine
  • Pharmacology
  • Epidemiology
  • Applied Microbiology and Biotechnology
  • Infectious Diseases

Within these domains, several key topics characterize Shields' work, including:

  • Antibiotic Resistance in Bacteria
  • Antibiotics Pharmacokinetics and Efficacy
  • Antibiotic Use and Resistance
  • Bacterial Identification and Susceptibility Testing
  • Antimicrobial Resistance in Staphylococcus
  • Pneumonia and Respiratory Infections
  • Infective Endocarditis Diagnosis and Management

Best Publications

  • Thrombectomy 6 to 24 Hours after Stroke with a Mismatch between Deficit and Infarct.

    Raul G. Nogueira;Ashutosh P. Jadhav;Diogo C. Haussen;Alain Bonafe

  • Ceftazidime-Avibactam Is Superior to Other Treatment Regimens against Carbapenem-Resistant Klebsiella pneumoniae Bacteremia.

    Ryan K. Shields;M. Hong Nguyen;Liang Chen;Ellen G. Press

  • Emergence of Ceftazidime-Avibactam Resistance Due to Plasmid-Borne blaKPC-3 Mutations during Treatment of Carbapenem-Resistant Klebsiella pneumoniae Infections.

    Ryan K. Shields;Liang Chen;Shaoji Cheng;Kalyan D. Chavda

  • Colistin-Resistant Acinetobacter baumannii: Beyond Carbapenem Resistance

    Zubair A. Qureshi;Lauren E. Hittle;Jessica A. O'Hara;Jesabel I. Rivera

  • Clinical Outcomes, Drug Toxicity, and Emergence of Ceftazidime-Avibactam Resistance Among Patients Treated for Carbapenem-Resistant Enterobacteriaceae Infections.

    Ryan K. Shields;Brian A. Potoski;Ghady Haidar;Binghua Hao

  • Performance of Candida Real-time Polymerase Chain Reaction, β-D-Glucan Assay, and Blood Cultures in the Diagnosis of Invasive Candidiasis

    M. Hong Nguyen;Mark C. Wissel;Ryan K. Shields;Martin A. Salomoni

  • Pneumonia and Renal Replacement Therapy Are Risk Factors for Ceftazidime-Avibactam Treatment Failures and Resistance among Patients with Carbapenem-Resistant Enterobacteriaceae Infections.

    Ryan K. Shields;M. Hong Nguyen;Liang Chen;Ellen G. Press

  • Ceftolozane-Tazobactam for the Treatment of Multidrug-Resistant Pseudomonas aeruginosa Infections: Clinical Effectiveness and Evolution of Resistance.

    Ghady Haidar;Nathan J Philips;Ryan K Shields;Daniel Snyder

  • Diffusion-weighted imaging or computerized tomography perfusion assessment with clinical mismatch in the triage of wake up and late presenting strokes undergoing neurointervention with Trevo (DAWN) trial methods:

    Tudor G Jovin;Jeffrey L Saver;Marc Ribo;Vitor Pereira

  • Mutations in blaKPC-3 That Confer Ceftazidime-Avibactam Resistance Encode Novel KPC-3 Variants That Function as Extended-Spectrum β-Lactamases

    Ghady Haidar;Cornelius J. Clancy;Ryan K. Shields;Binghua Hao

  • Comparison of an Aspergillus Real-time Polymerase Chain Reaction Assay With Galactomannan Testing of Bronchoalvelolar Lavage Fluid for the Diagnosis of Invasive Pulmonary Aspergillosis in Lung Transplant Recipients

    Me Linh Luong;Cornelius J. Clancy;Aniket Vadnerkar;Eun Jeong Kwak

  • The presence of an FKS mutation rather than MIC is an independent risk factor for failure of echinocandin therapy among patients with invasive candidiasis due to Candida glabrata

    Ryan K. Shields;M. Hong Nguyen;Ellen G. Press;Andrea L. Kwa

  • Prospective, observational study of voriconazole therapeutic drug monitoring among lung transplant recipients receiving prophylaxis: factors impacting levels of and associations between serum troughs, efficacy, and toxicity.

    Dimitra Mitsani;M. Hong Nguyen;Ryan K. Shields;Yoshiya Toyoda

  • Effects of Klebsiella pneumoniae Carbapenemase Subtypes, Extended-Spectrum β-Lactamases, and Porin Mutations on the In Vitro Activity of Ceftazidime-Avibactam against Carbapenem-Resistant K. pneumoniae

    Ryan K. Shields;Cornelius J. Clancy;Binghua Hao;Liang Chen

  • Epidemiology, Clinical Characteristics and Outcomes of Extensively Drug-Resistant Acinetobacter baumannii Infections among Solid Organ Transplant Recipients

    Ryan K. Shields;Cornelius J. Clancy;Louise M. Gillis;Eun J. Kwak

  • Intra-Abdominal Candidiasis: The Importance of Early Source Control and Antifungal Treatment.

    Pascalis Vergidis;Cornelius J. Clancy;Ryan K. Shields;Seo Young Park

  • Emergence of Ceftazidime-Avibactam Resistance and Restoration of Carbapenem Susceptibility in Klebsiella pneumoniae Carbapenemase-Producing K pneumoniae: A Case Report and Review of Literature

    Ryan K. Shields;M. Hong Nguyen;Ellen G. Press;Liang Chen

  • Carbapenem-Resistant Klebsiella pneumoniae Strains Exhibit Diversity in Aminoglycoside-Modifying Enzymes, Which Exert Differing Effects on Plazomicin and Other Agents

    Reem Almaghrabi;Cornelius J. Clancy;Cornelius J. Clancy;Yohei Doi;Binghua Hao

  • Klebsiella pneumoniae Carbapenemase-2 (KPC-2), Substitutions at Ambler Position Asp179, and Resistance to Ceftazidime-Avibactam: Unique Antibiotic-Resistant Phenotypes Emerge from β-Lactamase Protein Engineering.

    Melissa D. Barnes;Melissa D. Barnes;Marisa L. Winkler;Marisa L. Winkler;Magdalena A. Taracila;Magdalena A. Taracila;Malcolm G. Page

  • Identifying Spectra of Activity and Therapeutic Niches for Ceftazidime-Avibactam and Imipenem-Relebactam against Carbapenem-Resistant Enterobacteriaceae.

    Ghady Haidar;Cornelius J. Clancy;Liang Chen;Palash Samanta

  • Navigating Available Treatment Options for Carbapenem-Resistant Acinetobacter baumannii-calcoaceticus Complex Infections

    Unknown

  • Abdominal Candidiasis Is a Hidden Reservoir of Echinocandin Resistance

    Ryan K. Shields;M. Hong Nguyen;Ellen G. Press;Cornelius J. Clancy

Frequent Co-Authors

Cornelius J. Clancy
Cornelius J. Clancy University of Pittsburgh
M. Hong Nguyen
M. Hong Nguyen University of Pittsburgh
Yohei Doi
Yohei Doi University of Pittsburgh
Barry N. Kreiswirth
Barry N. Kreiswirth Center for Discovery and Innovation
Liang Chen
Liang Chen Hackensack Meridian Health Center for Discovery and Innovation
Joseph M. Pilewski
Joseph M. Pilewski University of Pittsburgh
David S. Liebeskind
David S. Liebeskind University of California, Los Angeles
A. William Pasculle
A. William Pasculle University of Pittsburgh
David S. Perlin
David S. Perlin Rutgers, The State University of New Jersey
Tudor G. Jovin
Tudor G. Jovin Cooper University Hospital

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Related Online Degrees & Career Pathways

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For those inclined toward administration and data management, a career as a health information manager offers strong salary potential and job stability. Learning about the health information management salary landscape can be motivating for prospective students seeking alternatives to lab-based roles.

To pursue such administrative careers, it’s advisable to consider accredited programs. The best online cahiim accredited health information management degree programs provide flexible learning options that ensure quality education aligned with industry standards, ideal for working professionals or students seeking remote study.

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