Claus Østergaard

1.1k total citations
29 papers, 600 citations indexed

About

Claus Østergaard is a scholar working on Clinical Biochemistry, Epidemiology and Infectious Diseases. According to data from OpenAlex, Claus Østergaard has authored 29 papers receiving a total of 600 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Clinical Biochemistry, 11 papers in Epidemiology and 9 papers in Infectious Diseases. Recurrent topics in Claus Østergaard's work include Bacterial Identification and Susceptibility Testing (13 papers), Antibiotic Resistance in Bacteria (9 papers) and Antimicrobial Resistance in Staphylococcus (7 papers). Claus Østergaard is often cited by papers focused on Bacterial Identification and Susceptibility Testing (13 papers), Antibiotic Resistance in Bacteria (9 papers) and Antimicrobial Resistance in Staphylococcus (7 papers). Claus Østergaard collaborates with scholars based in Denmark, Australia and United States. Claus Østergaard's co-authors include Jens Kjølseth Møller, Brian Kristensen, Turid Snekloth Søndergaard, Henrik Carl Schønheyder, Tove Ejlertsen, Anette M. Hammerum, Henrik Nielsen, Kim Oren Gradel, Kevin Hansen and Henrik Hasman and has published in prestigious journals such as PLoS ONE, Clinical Infectious Diseases and PLoS Medicine.

In The Last Decade

Claus Østergaard

27 papers receiving 589 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Claus Østergaard Denmark	14	251	160	156	156	120	29	600
Andrea Vergara Spain	19	188 0.7×	177 1.1×	298 1.9×	175 1.1×	174 1.4×	51	740
A. Florijn Netherlands	11	200 0.8×	365 2.3×	200 1.3×	134 0.9×	143 1.2×	12	665
Gunturu Revathi Kenya	13	240 1.0×	171 1.1×	132 0.8×	87 0.6×	74 0.6×	27	625
Karen Leth Nielsen Denmark	13	153 0.6×	221 1.4×	229 1.5×	100 0.6×	171 1.4×	40	609
M.-N. Kim South Korea	12	330 1.3×	102 0.6×	143 0.9×	113 0.7×	145 1.2×	14	532
Nadia Hidri France	12	314 1.3×	345 2.2×	157 1.0×	148 0.9×	175 1.5×	19	738
Mercedes Rodríguez-Baños Spain	11	135 0.5×	151 0.9×	159 1.0×	88 0.6×	293 2.4×	16	619
Assia Ben Hassen Tunisia	15	175 0.7×	346 2.2×	156 1.0×	82 0.5×	186 1.6×	49	847
Patricia García Chile	13	193 0.8×	246 1.5×	90 0.6×	72 0.5×	116 1.0×	49	535
Clara Duran France	15	197 0.8×	152 0.9×	190 1.2×	62 0.4×	121 1.0×	45	616

Countries citing papers authored by Claus Østergaard

Since Specialization

Citations

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

Fields of papers citing papers by Claus Østergaard

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Claus Østergaard. 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 Claus Østergaard. The network helps show where Claus Østergaard may publish in the future.

Co-authorship network of co-authors of Claus Østergaard

This figure shows the co-authorship network connecting the top 25 collaborators of Claus Østergaard. A scholar is included among the top collaborators of Claus Østergaard 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 Claus Østergaard. Claus Østergaard 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

Rebelo, Ana Rita, Valeria Bortolaia, Pimlapas Leekitcharoenphon, et al.. (2025). One day in Denmark: whole-genome sequence-based analysis of Escherichia coli isolates from clinical settings. Journal of Antimicrobial Chemotherapy. 80(4). 1011–1021.

Hallstrøm, Søren, Inger Brock, Esad Dzajic, et al.. (2024). Gonorrhoea on the rise in Denmark since 2022: distinct clones drive increase in heterosexual individuals. Eurosurveillance. 29(7). 3 indexed citations

Hertz, Marshall I., Işık Somuncu Johansen, Flemming Schønning Rosenvinge, et al.. (2024). Urine Flow Cytometry and Dipstick Analysis in Diagnosing Bacteriuria and Urinary Tract Infections among Adults in the Emergency Department—A Diagnostic Accuracy Trial. Diagnostics. 14(4). 412–412. 1 indexed citations

Holzknecht, Barbara Juliane, Claus Østergaard, Esad Dzajic, et al.. (2024). A seemingly considerable increase in antimicrobial resistance in the Bacteroides fragilis group from blood cultures – the second national study in Denmark. Infectious Diseases. 57(4). 316–321.

Rosenvinge, Flemming Schønning, et al.. (2023). Evaluation of point-of-care multiplex polymerase chain reaction in guiding antibiotic treatment of patients acutely admitted with suspected community-acquired pneumonia in Denmark: A multicentre randomised controlled trial. PLoS Medicine. 20(11). e1004314–e1004314. 22 indexed citations

Hansen, Frank, Lone Jannok Porsbo, Louise Roer, et al.. (2023). Characterisation of carbapenemase-producing Acinetobacter baumannii isolates from danish patients 2014–2021: detection of a new international clone – IC11. International Journal of Antimicrobial Agents. 62(2). 106866–106866. 17 indexed citations

Rebelo, Ana Rita, Tobias Ibfelt, Valeria Bortolaia, et al.. (2022). One Day in Denmark: Nationwide point-prevalence survey of human bacterial isolates and comparison of classical and whole-genome sequence-based species identification methods. PLoS ONE. 17(2). e0261999–e0261999. 9 indexed citations

Skjøt‐Arkil, Helene, Marshall I. Hertz, Ole Graumann, et al.. (2021). Improved diagnostics of infectious diseases in emergency departments: a protocol of a multifaceted multicentre diagnostic study. BMJ Open. 11(9). e049606–e049606. 15 indexed citations

Rebelo, Ana Rita, Valeria Bortolaia, Pimlapas Leekitcharoenphon, et al.. (2021). Danish Whole-Genome-Sequenced Candida albicans and Candida glabrata Samples Fit into Globally Prevalent Clades. Journal of Fungi. 7(11). 962–962. 6 indexed citations

10.

Hammerum, Anette M., Louise Roer, Frank Hansen, et al.. (2020). Investigation of possible clonal transmission of carbapenemase-producing Klebsiella pneumoniae complex member isolates in Denmark using core genome MLST and National Patient Registry Data. International Journal of Antimicrobial Agents. 55(5). 105931–105931. 7 indexed citations

11.

Kaya, Hülya, Louise Roer, Frank Hansen, et al.. (2020). Molecular characterization of Danish ESBL/AmpC-producing Klebsiella pneumoniae from bloodstream infections, 2018. Journal of Global Antimicrobial Resistance. 22. 562–567. 13 indexed citations

12.

Lü, Rui, Margit W. Frederiksen, Katrine Uhrbrand, et al.. (2020). Wastewater treatment plant workers’ exposure and methods for risk evaluation of their exposure. Ecotoxicology and Environmental Safety. 205. 111365–111365. 42 indexed citations

13.

Hammerum, Anette M., Lone Jannok Porsbo, Frank Hansen, et al.. (2020). Surveillance of OXA-244-producing Escherichia coli and epidemiologic investigation of cases, Denmark, January 2016 to August 2019. Eurosurveillance. 25(18). 23 indexed citations

14.

Hammerum, Anette M., Ulrik Stenz Justesen, Mette Pinholt, et al.. (2019). Surveillance of vancomycin-resistant enterococci reveals shift in dominating clones and national spread of a vancomycin-variable vanA Enterococcus faecium ST1421-CT1134 clone, Denmark, 2015 to March 2019. Eurosurveillance. 24(34). 49 indexed citations

15.

Østergaard, Claus & Jens Kjølseth Møller. (2018). Subdivision of MRSA CC398 isolates using MALDI-TOF MS. International Journal of Medical Microbiology. 308(4). 476–485. 6 indexed citations

16.

Roer, Louise, Frank Hansen, Martin Christen Frølund Thomsen, et al.. (2017). WGS-based surveillance of third-generation cephalosporin-resistant Escherichia coli from bloodstream infections in Denmark. Journal of Antimicrobial Chemotherapy. 72(7). 1922–1929. 61 indexed citations

17.

Østergaard, Claus, et al.. (2015). Rapid first-line discrimination of methicillin resistant Staphylococcus aureus strains using MALDI-TOF MS. International Journal of Medical Microbiology. 305(8). 838–847. 36 indexed citations

18.

Möller, Jens, Claus Østergaard, Mical Paul, et al.. (2013). Prediction of bacteraemia in a low-bacteraemia-prevalence cohort using the Treat decision support system. Minimally Invasive Therapy & Allied Technologies. 22. 2 indexed citations

19.

Hansen, Frank, Helle Krogh Johansen, Claus Østergaard, et al.. (2013). Characterization of Carbapenem Nonsusceptible Pseudomonas aeruginosa in Denmark: A Nationwide, Prospective Study. Microbial Drug Resistance. 20(1). 22–29. 12 indexed citations

20.

Nielsen, Henrik, Kevin Hansen, Kim Oren Gradel, et al.. (2009). Bacteraemia as a result of Campylobacter species: a population-based study of epidemiology and clinical risk factors. Clinical Microbiology and Infection. 16(1). 57–61. 75 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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