Jean‐Ralph Zahar

9.9k total citations · 1 hit paper
154 papers, 5.1k citations indexed

About

Jean‐Ralph Zahar is a scholar working on Epidemiology, Molecular Medicine and Infectious Diseases. According to data from OpenAlex, Jean‐Ralph Zahar has authored 154 papers receiving a total of 5.1k indexed citations (citations by other indexed papers that have themselves been cited), including 63 papers in Epidemiology, 63 papers in Molecular Medicine and 44 papers in Infectious Diseases. Recurrent topics in Jean‐Ralph Zahar's work include Antibiotic Resistance in Bacteria (63 papers), Antibiotic Use and Resistance (44 papers) and Nosocomial Infections in ICU (39 papers). Jean‐Ralph Zahar is often cited by papers focused on Antibiotic Resistance in Bacteria (63 papers), Antibiotic Use and Resistance (44 papers) and Nosocomial Infections in ICU (39 papers). Jean‐Ralph Zahar collaborates with scholars based in France, United States and Switzerland. Jean‐Ralph Zahar's co-authors include Élie Azoulay, Christophe Adrie, Maïté Garrouste-Orgeas, Benoı̂t Schlemmer, Éric Dannaoui, Yves Cohen, Alban Le Monnier, Christian Brun‐Buisson, Étienne Carbonnelle and Jean-François Timsit and has published in prestigious journals such as The Journal of Experimental Medicine, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Jean‐Ralph Zahar

142 papers receiving 5.0k citations

Hit Papers

align trajectories sort by overperformance

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.

Healthcare-associated infections in adult intensive care unit patients: Changes in epidemiology, diagnosis, prevention and contributions of new technologies

2022 156 citations Stijn Blot, Étienne Ruppé et al. Intensive and Critical Care Nursing profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Jean‐Ralph Zahar France	38	2.1k	1.5k	1.2k	1.1k	688	154	5.1k
Jean‐Christophe Lucet France	41	1.5k 0.7×	1.9k 1.3×	929 0.8×	1.4k 1.3×	686 1.0×	171	5.9k
Lisa L. Maragakis United States	38	1.9k 0.9×	1.7k 1.1×	1.2k 1.0×	1.8k 1.7×	861 1.3×	113	7.4k
Maria Luisa Moro Italy	40	1.7k 0.8×	1.6k 1.1×	1.0k 0.8×	763 0.7×	912 1.3×	160	5.7k
Shelley S. Magill United States	30	2.7k 1.3×	2.7k 1.8×	1.5k 1.3×	805 0.8×	1.0k 1.5×	70	6.7k
Carolina García‐Vidal Spain	47	3.8k 1.8×	1.8k 1.2×	750 0.6×	996 0.9×	990 1.4×	222	6.8k
Zeina A. Kanafani Lebanon	34	1.6k 0.7×	1.5k 1.0×	469 0.4×	868 0.8×	480 0.7×	120	4.4k
Souha S. Kanj Lebanon	38	2.2k 1.1×	1.9k 1.3×	440 0.4×	1.1k 1.1×	372 0.5×	223	5.8k
Philippe Eggimann Switzerland	41	2.6k 1.2×	2.5k 1.6×	1.4k 1.2×	569 0.5×	684 1.0×	113	5.8k
Francisco Álvarez-Lerma Spain	34	2.5k 1.2×	1.8k 1.2×	1.6k 1.3×	814 0.8×	813 1.2×	201	5.0k
Michael J. Richards Australia	37	2.2k 1.0×	1.6k 1.0×	1.5k 1.2×	577 0.5×	449 0.7×	144	6.1k

Countries citing papers authored by Jean‐Ralph Zahar

Since Specialization

Citations

This map shows the geographic impact of Jean‐Ralph Zahar'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 Jean‐Ralph Zahar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Jean‐Ralph Zahar more than expected).

Fields of papers citing papers by Jean‐Ralph Zahar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Jean‐Ralph Zahar. 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 Jean‐Ralph Zahar. The network helps show where Jean‐Ralph Zahar may publish in the future.

Co-authorship network of co-authors of Jean‐Ralph Zahar

This figure shows the co-authorship network connecting the top 25 collaborators of Jean‐Ralph Zahar. A scholar is included among the top collaborators of Jean‐Ralph Zahar 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 Jean‐Ralph Zahar. Jean‐Ralph Zahar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Barbier, François, Niccolò Buetti, Carole Schwebel, et al.. (2025). Prognostic Impact of Early Appropriate Antimicrobial Therapy in Critically Ill Patients With Nosocomial Pneumonia Due to Gram-Negative Pathogens: A Multicenter Cohort Study. Critical Care Medicine. 53(5). e1066–e1079. 1 indexed citations

Gouél‐Cheron, Aurélie, Catherine Neukirch, A. Barbaud, et al.. (2025). National expert consensus on the management of antibiotic prophylaxis in surgical patients with a penicillin allergy label based on the Delphi method. JAC-Antimicrobial Resistance. 7(2). dlaf024–dlaf024.

Kherabi, Yousra, Stéphane Corvec, Chloé Plouzeau-Jayle, et al.. (2024). Outcomes of Enterococcus faecalis infective endocarditis according to MIC of amoxicillin: a multicentric study. JAC-Antimicrobial Resistance. 6(6). dlae167–dlae167.

Zahar, Jean‐Ralph, et al.. (2023). Limiting the Spread of Multidrug-Resistant Bacteria in Low-to-Middle-Income Countries: One Size Does Not Fit All. Pathogens. 12(1). 144–144. 14 indexed citations

Couturier, Jeanne, Patrick Grohs, Aurélie Vilfaillot, et al.. (2023). Prevalence and risk factors of toxigenic Clostridioides difficile asymptomatic carriage in 11 French hospitals. Frontiers in Medicine. 10. 1221363–1221363. 8 indexed citations

Blot, Stijn, Étienne Ruppé, Stephan Harbarth, et al.. (2022). Healthcare-associated infections in adult intensive care unit patients: Changes in epidemiology, diagnosis, prevention and contributions of new technologies. Intensive and Critical Care Nursing. 70. 103227–103227. 156 indexed citations breakdown →

Pilmis, B., Assaf Mizrahi, Olivier Voisin, et al.. (2021). No significant difference between ceftriaxone and cefotaxime in the emergence of antibiotic resistance in the gut microbiota of hospitalized patients: A pilot study. International Journal of Infectious Diseases. 104. 617–623. 9 indexed citations

Temime, Laura, Marie‐Paule Gustin, Audrey Duval, et al.. (2020). A Conceptual Discussion About the Basic Reproduction Number of Severe Acute Respiratory Syndrome Coronavirus 2 in Healthcare Settings. Clinical Infectious Diseases. 72(1). 141–143. 26 indexed citations

Bruyère, F., M. Vallée, C. Goux, et al.. (2020). Recommandations courtes du CIAFU : intérêt de l’ECBU avant biopsie de la prostate réalisée par voie endo-rectale. Progrès en Urologie. 31(5). 245–248. 4 indexed citations

10.

Yazdanpanah, Yazdan, Anne Perozziello, Jean‐Ralph Zahar, et al.. (2020). Hand hygiene improvement or antibiotic restriction to control the household transmission of extended-spectrum β-lactamase-producing Escherichia coli: a mathematical modelling study. Antimicrobial Resistance and Infection Control. 9(1). 139–139. 14 indexed citations

11.

Planquette, Benjamin, Jean-François Timsit, Benoît Misset, et al.. (2013). Pseudomonas aeruginosa Ventilator-associated Pneumonia. Predictive Factors of Treatment Failure. American Journal of Respiratory and Critical Care Medicine. 188(1). 69–76. 92 indexed citations

12.

Jacquier, Hervé, Alban Le Monnier, Étienne Carbonnelle, et al.. (2012). In Vitro Antimicrobial Activity of “Last-Resort” Antibiotics Against Unusual Nonfermenting Gram-Negative Bacilli Clinical Isolates. Microbial Drug Resistance. 18(4). 396–401. 20 indexed citations

13.

Rammaert, Blandine, Fanny Lanternier, Jean‐Ralph Zahar, et al.. (2012). Healthcare-Associated Mucormycosis. Clinical Infectious Diseases. 54(suppl_1). S44–S54. 202 indexed citations

14.

Zahar, Jean‐Ralph, Jean-François Timsit, Maïté Garrouste-Orgeas, et al.. (2011). Outcomes in severe sepsis and patients with septic shock: Pathogen species and infection sites are not associated with mortality*. Critical Care Medicine. 39(8). 1886–1895. 175 indexed citations

15.

Lucet, Jean‐Christophe, Lila Bouadma, Jean‐Ralph Zahar, et al.. (2010). Infectious risk associated with arterial catheters compared with central venous catheters*. Critical Care Medicine. 38(4). 1030–1035. 86 indexed citations

16.

Nguilé-Makao, Molière, Jean‐Ralph Zahar, Adrien Français, et al.. (2010). Attributable mortality of ventilator-associated pneumonia: respective impact of main characteristics at ICU admission and VAP onset using conditional logistic regression and multi-state models. Intensive Care Medicine. 36(5). 781–789. 131 indexed citations

17.

Zahar, Jean‐Ralph, Emmanuelle Bille, David Schnell, et al.. (2009). Diffusion communautaire des entérobactéries sécrétrices de β-lactamase à spectre élargi (EBLSE). médecine/sciences. 25(11). 939–944. 13 indexed citations

18.

Pochard, Frédéric, Michaël Darmon, Thomas Fassier, et al.. (2005). Symptoms of anxiety and depression in family members of intensive care unit patients before discharge or death. A prospective multicenter study. Journal of Critical Care. 20(1). 90–96. 326 indexed citations

19.

Zahar, Jean‐Ralph & Christian Brun‐Buisson. (2001). Dermo-hypodermites et fasciites nécrosantes.. La Revue du praticien. 51(6).

20.

Delclaux, Christophe, Jean‐Ralph Zahar, Ghislaine Leleu, et al.. (1999). Corticosteroids as Adjunctive Therapy for Severe Pneumocystis carinii Pneumonia in Non-Human Immunodeficiency Virus-Infected Patients: Retrospective Study of 31 Patients. Clinical Infectious Diseases. 29(3). 670–672. 77 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.

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