Fred A. Zar

1.8k total citations · 1 hit paper
19 papers, 1.2k citations indexed

About

Fred A. Zar is a scholar working on Epidemiology, Infectious Diseases and Public Health, Environmental and Occupational Health. According to data from OpenAlex, Fred A. Zar has authored 19 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Epidemiology, 6 papers in Infectious Diseases and 5 papers in Public Health, Environmental and Occupational Health. Recurrent topics in Fred A. Zar's work include Antibiotic Resistance in Bacteria (3 papers), Innovations in Medical Education (3 papers) and Antibiotics Pharmacokinetics and Efficacy (3 papers). Fred A. Zar is often cited by papers focused on Antibiotic Resistance in Bacteria (3 papers), Innovations in Medical Education (3 papers) and Antibiotics Pharmacokinetics and Efficacy (3 papers). Fred A. Zar collaborates with scholars based in United States. Fred A. Zar's co-authors include Melinda B. Davis, Lisa Anderson-Shaw, Karen Hayani, Ara Tekian, Margaret Yungbluth, Yoon Soo Park, George Gee Jackson, Rodger D. MacArthur, John J. Norcini and Pegah Eslami and has published in prestigious journals such as Annals of Internal Medicine, Clinical Infectious Diseases and The Journal of Infectious Diseases.

In The Last Decade

Fred A. Zar

18 papers receiving 1.2k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

A Comparison of Vancomycin and Metronidazole for the Treatment of Clostridium difficile-Associated Diarrhea, Stratified by Disease Severity

2007 953 citations Fred A. Zar, Melinda B. Davis et al. Clinical Infectious Diseases profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Fred A. Zar United States	10	966	847	281	159	113	19	1.2k
Claire Béliveau Canada	14	851 0.9×	776 0.9×	171 0.6×	222 1.4×	81 0.7×	22	1.1k
Tuyen Nguyen Vietnam	5	1.5k 1.5×	1.1k 1.3×	322 1.1×	320 2.0×	128 1.1×	9	1.6k
Larry K. Kociolek United States	18	856 0.9×	509 0.6×	231 0.8×	65 0.4×	114 1.0×	86	1.1k
Aaron E. Glatt United States	17	679 0.7×	549 0.6×	191 0.7×	85 0.5×	20 0.2×	46	1.2k
Amit S. Chitnis United States	14	544 0.6×	558 0.7×	140 0.5×	98 0.6×	23 0.2×	54	955
Élise Fortin Canada	17	555 0.6×	626 0.7×	98 0.3×	169 1.1×	18 0.2×	45	986
A. Colville United Kingdom	11	436 0.5×	729 0.9×	129 0.5×	60 0.4×	52 0.5×	13	1.1k
Wafa N. Al‐Nassir United States	6	1.5k 1.6×	587 0.7×	125 0.4×	187 1.2×	40 0.4×	7	1.7k
Kateri H. Leckerman United States	14	429 0.4×	442 0.5×	173 0.6×	50 0.3×	39 0.3×	19	875
S. B. Debast Netherlands	15	1.9k 2.0×	1.4k 1.7×	396 1.4×	323 2.0×	209 1.8×	24	2.1k

Countries citing papers authored by Fred A. Zar

Since Specialization

Citations

This map shows the geographic impact of Fred A. Zar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Fred A. Zar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Fred A. Zar more than expected).

Fields of papers citing papers by Fred A. Zar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Fred A. Zar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Fred A. Zar. The network helps show where Fred A. Zar may publish in the future.

Co-authorship network of co-authors of Fred A. Zar

This figure shows the co-authorship network connecting the top 25 collaborators of Fred A. Zar. A scholar is included among the top collaborators of Fred A. Zar based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Fred A. Zar. Fred A. Zar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

19 of 19 papers shown

Zar, Fred A.. (2025). In men and gender-diverse persons, twice-yearly subcutaneous lenacapavir vs. daily oral F/TDF reduced HIV incidence. Annals of Internal Medicine. 178(4). JC42–JC42.

Yazıcı, Cemal, et al.. (2022). Diagnosis and Management of Lemmel Syndrome: An Unusual Presentation and Literature Review. Case Reports in Gastroenterology. 16(3). 663–674. 13 indexed citations

Anderson-Shaw, Lisa & Fred A. Zar. (2020). COVID-19, Moral Conflict, Distress, and Dying Alone. Journal of Bioethical Inquiry. 17(4). 777–782. 41 indexed citations

Tekian, Ara, et al.. (2019). Competencies and Feedback on Internal Medicine Residents’ End-of-Rotation Assessments Over Time: Qualitative and Quantitative Analyses. Academic Medicine. 94(12). 1961–1969. 21 indexed citations

Park, Yoon Soo, Fred A. Zar, & Ara Tekian. (2019). Synthesizing and Reporting Milestones-Based Learner Analytics: Validity Evidence From a Longitudinal Cohort of Internal Medicine Residents. Academic Medicine. 95(4). 599–608. 4 indexed citations

Park, Yoon Soo, Fred A. Zar, John J. Norcini, & Ara Tekian. (2016). Competency Evaluations in the Next Accreditation System: Contributing to Guidelines and Implications. Teaching and Learning in Medicine. 28(2). 135–145. 26 indexed citations

Corbridge, Susan, et al.. (2013). Implementation of an Interprofessional Educational Model. Nurse Educator. 38(6). 261–264. 7 indexed citations

Hayani, Karen, et al.. (2013). Meningitis. Primary Care Clinics in Office Practice. 40(3). 707–726. 38 indexed citations

Zar, Fred A., et al.. (2007). A Comparison of Vancomycin and Metronidazole for the Treatment of Clostridium difficile-Associated Diarrhea, Stratified by Disease Severity. Clinical Infectious Diseases. 45(3). 302–307. 953 indexed citations breakdown →

10.

Zar, Fred A. & Melinda B. Davis. (2007). Reply to Bishara et al., Huggan et al., and Lawrence et al. Clinical Infectious Diseases. 45(12). 1649–1651. 2 indexed citations

11.

Zar, Fred A., et al.. (2001). Histologic Proof of Acalculous Cholecystitis Due toCyclospora cayetanensis. Clinical Infectious Diseases. 33(12). e140–e141. 34 indexed citations

12.

Zar, Fred A., et al.. (1998). Pancardiac Tuberculosis. Angiology. 49(2). 151–156. 8 indexed citations

13.

Eslami, Pegah, et al.. (1996). Lymphocutaneous Sporotrichosis Associated with a Squirrel Bite: Case Report and Review. Clinical Infectious Diseases. 23(3). 647–648. 16 indexed citations

14.

Zar, Fred A.. (1994). Didanosine benefited HIV-infected patients failing on zidovudine. ACP Journal Club. 121(1). 2–2. 4 indexed citations

15.

Zar, Fred A., et al.. (1985). In vitro studies of investigational beta-lactams as possible therapy for Pseudomonas aeruginosa endocarditis. Antimicrobial Agents and Chemotherapy. 27(1). 1–3. 8 indexed citations

16.

Zar, Fred A., et al.. (1985). Infection with Clindamycin–Resistant Bacteroides uniformis. Chemotherapy. 31(1). 29–33. 1 indexed citations

17.

MacArthur, Rodger D., et al.. (1984). Biphasic, Concentration-Dependent and Rate-Limited, Concentration-Independent Bacterial Killing by an Aminoglycoside Antibiotic. The Journal of Infectious Diseases. 150(5). 778–779. 39 indexed citations

18.

Zar, Fred A.. (1983). Modified broth-disk surveillance of clindamycin-resistant Bacteroides fragilis group. Antimicrobial Agents and Chemotherapy. 23(6). 947–949. 1 indexed citations

19.

Panwalker, Anand P., et al.. (1981). Clinical Efficacy of Moxalactam with Emphasis on Infections Due to Multidrug-Resistant Organisms in Patients with Renal Insufficiency. Chemotherapy. 27(4). 287–295. 12 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact