Ryan K. Shields

University of Pittsburgh — United States

Biochemistry, Genetics and Molecular Biology · Life Sciences

57h-index9.9kcitations314works3.72yr avg

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Research Topics

Antibiotic Resistance in Bacteria(145), Antibiotics Pharmacokinetics and Efficacy(124), Antibiotic Use and Resistance(58), Antifungal resistance and susceptibility(56), Bacterial Identification and Susceptibility Testing(43)

Publications314 total

Effectiveness of ceftazidime–avibactam versus ceftolozane–tazobactam for multidrug-resistant Pseudomonas aeruginosa infections in the USA (CACTUS): a multicentre, retrospective, observational study

UNC Libraries·2026Open Access

Ceftolozane/Tazobactam for Complex and Resistant Infections: Systematic Reviews of Comparative Efficacy Studies

Antibiotics·2026Open Access

Exploring the Effectiveness of Imipenem/Relebactam in Patients with Antimicrobial-Resistant Hospital-Acquired Infections: Findings from Systematic Literature Reviews

Antibiotics·2026Open Access

Resistance development to new anti-Gram negatives antibiotics during treatment: geographical epidemiology and risk factors

Clinical Microbiology and Infection·2026

P-1354. Outcomes of Patients Treated With Cefiderocol For Infections Caused by β-Lactam–β-Lactamase Inhibitor Non-Susceptible Bacteria: Subgroup Analysis of the PROVE Study

Open Forum Infectious Diseases·2026Open Access

P-764. Defining Stewardship Opportunities Among Hospitalized Patients Prescribed Antibiotics for Positive Urine Cultures

Open Forum Infectious Diseases·2026Open Access

P-768. Clinical Complications Among Patients with Complicated Urinary Tract Infections Treated with Intravenous Carbapenems in Hospital: a US Cohort Study

Open Forum Infectious Diseases·2026Open Access

P-1211. Effectiveness of iMIpenem-Relebactam for multidrug-resistant Pseudomonas AeruGinosa in pnEumonia and bloodstream infections in the United States (MIRAGE)

Open Forum Infectious Diseases·2026Open Access

Clinical outcomes of metronidazole dosing strategies in obese patients with Bacteroides bloodstream infections

International Journal of Antimicrobial Agents·2025

Incidence and factors associated with rapid blood culture sterilization among patients receiving ertapenem combination therapy for MSSA bacteremia

Antimicrobial Agents and Chemotherapy·2025Open Access

Evaluating hypoalbuminaemia thresholds associated with delayed blood sterilization among patients receiving cefazolin or antistaphylococcal penicillins for MSSA bacteraemia

Journal of Antimicrobial Chemotherapy·2025

Allele-specific effects of mutations in the rifampin resistance-determining region (RRDR) of RpoB on physiology and antibiotic resistance in Enterococcus faecium

mSphere·2025Open Access

First Report of Treatment-Emergent Resistance to Cefepime-Zidebactam in Pseudomonas aeruginosa

2 cited

Clinical Infectious Diseases·2025· 2 cited

Effectiveness of imipenem-relebactam for multidrug-resistant Pseudomonas aeruginosa in pneumonia and bloodstream infections in the United States (MIRAGE)

Antimicrobial Agents and Chemotherapy·2025Open Access

Epidemiology and treatment of endocarditis secondary to Enterobacterales other than Serratia spp.

Journal of Antimicrobial Chemotherapy·2025

In vitro evolution of durlobactam resistance in NDM-producing Escherichia coli due to a single mutation in mrdA encoding penicillin-binding protein 2

1 cited

Antimicrobial Agents and Chemotherapy·2025· 1 citedOpen Access

Current and future options for the treatment of serious infections due to carbapenem-resistant Pseudomonas aeruginosa

Clinical Microbiology Reviews·2025Open Access

Turning the Tide Against Carbapenem-resistant Acinetobacter baumannii : Advancing Care With Sulbactam–Durlobactam

Open Forum Infectious Diseases·2025Open Access

Within-Patient Evolution of Pseudomonas aeruginosa Populations During Antimicrobial Treatment

2025Open Access

New anti-infective approaches to treat airway infections in persons with cystic fibrosis and bronchiectasis

Current Opinion in Pulmonary Medicine·2025

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Frequent Co-authors

Cornelius J. Clancy(35), M. Hong Nguyen(22), Ellen G. Press(17), Yohei Doi(15), Barry N. Kreiswirth(14), Liang Chen(13), M. Hong Nguyen(12), Brian A. Potoski(8), Binghua Hao(8), E.J. Kwak(8), Fernanda P. Silveira(7), Shaoji Cheng(6), Lloyd Clarke(5), Ghady Haidar(4), M. Crespo(4), Joseph M. Pilewski(4), Ellen G Kline(4), A. William Pasculle(3), Dimitra Mitsani(3), Gregory Eschenauer(3)