Helge Karch

16.8k total citations · 7 hit papers
204 papers, 13.2k citations indexed

About

Helge Karch is a scholar working on Endocrinology, Infectious Diseases and Molecular Biology. According to data from OpenAlex, Helge Karch has authored 204 papers receiving a total of 13.2k indexed citations (citations by other indexed papers that have themselves been cited), including 171 papers in Endocrinology, 129 papers in Infectious Diseases and 33 papers in Molecular Biology. Recurrent topics in Helge Karch's work include Escherichia coli research studies (170 papers), Viral gastroenteritis research and epidemiology (126 papers) and Bacteriophages and microbial interactions (25 papers). Helge Karch is often cited by papers focused on Escherichia coli research studies (170 papers), Viral gastroenteritis research and epidemiology (126 papers) and Bacteriophages and microbial interactions (25 papers). Helge Karch collaborates with scholars based in Germany, United States and Austria. Helge Karch's co-authors include Martina Bielaszewska, Alexander Mellmann, Wenlan Zhang, Herbert Schmidt, Lothar Beutin, Angelika Fruth, Phillip I. Tarr, Andreas Bauwens, M. Alexander Schmidt and Thorsten Kuczius and has published in prestigious journals such as Proceedings of the National Academy of Sciences, The Journal of Immunology and Gastroenterology.

In The Last Decade

Helge Karch

203 papers receiving 12.8k citations

Hit Papers

5 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.

Multicenter Evaluation of a Sequence-Based Protocol for Subtyping Shiga Toxins and Standardizing Stx Nomenclature

2012 626 citations Denis Piérard, Helge Karch et al. profile →
Escherichia coliHarboring Shiga Toxin 2 Gene Variants: Frequency and Association with Clinical Symptoms

2002 590 citations Alexander W. Friedrich, Martina Bielaszewska et al. profile →
Molecular analysis of the plasmid-encoded hemolysin of Escherichia coli O157:H7 strain EDL 933

1995 589 citations Herbert Schmidt, Helge Karch et al. profile →
Characterisation of the Escherichia coli strain associated with an outbreak of haemolytic uraemic syndrome in Germany, 2011: a microbiological study

2011 563 citations Martina Bielaszewska, Alexander Mellmann et al. profile →
Prospective Genomic Characterization of the German Enterohemorrhagic Escherichia coli O104:H4 Outbreak by Rapid Next Generation Sequencing Technology

2011 539 citations Alexander Mellmann, Wenlan Zhang et al. PLoS ONE profile →
Enterohaemorrhagic Escherichia coli in human medicine

2005 532 citations Helge Karch, Martina Bielaszewska et al. International Journal of Medical Microbiology profile →
The Diarrheal Response of Humans to Some Classic Serotypes of Enteropathogenic Escherichia coli is Dependent on a Plasmid Encoding an Enteroadhesiveness Factor

1985 402 citations Helge Karch et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Helge Karch Germany	58	9.8k	7.5k	3.0k	2.2k	1.7k	204	13.2k
Martina Bielaszewska Germany	51	6.6k 0.7×	5.2k 0.7×	2.0k 0.7×	1.2k 0.5×	1.3k 0.7×	125	8.4k
Michael S. Donnenberg United States	56	10.6k 1.1×	5.9k 0.8×	3.4k 1.2×	3.5k 1.6×	1.4k 0.8×	130	13.8k
Gad Frankel United Kingdom	74	11.7k 1.2×	7.3k 1.0×	4.5k 1.5×	5.0k 2.3×	1.5k 0.8×	324	18.5k
Alexander Mellmann Germany	53	4.5k 0.5×	6.2k 0.8×	1.9k 0.6×	3.3k 1.5×	1.2k 0.7×	292	11.4k
Michael Hensel Germany	61	5.4k 0.5×	2.5k 0.3×	5.7k 1.9×	3.8k 1.8×	2.5k 1.5×	223	13.1k
David W. Holden United Kingdom	72	5.5k 0.6×	3.3k 0.4×	5.3k 1.8×	5.1k 2.4×	2.2k 1.3×	186	16.0k
Roy Curtiss United States	67	4.7k 0.5×	4.1k 0.5×	5.4k 1.8×	5.3k 2.5×	3.0k 1.7×	297	15.8k
Yoshifumi Takeda Japan	54	6.9k 0.7×	2.2k 0.3×	2.7k 0.9×	2.3k 1.1×	912 0.5×	240	10.3k
Duncan J. Maskell United Kingdom	62	3.1k 0.3×	3.0k 0.4×	4.2k 1.4×	3.7k 1.7×	2.5k 1.4×	241	12.5k
David A. Rasko United States	60	4.9k 0.5×	2.8k 0.4×	2.1k 0.7×	6.6k 3.1×	2.3k 1.4×	195	13.5k

Countries citing papers authored by Helge Karch

Since Specialization

Citations

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

Fields of papers citing papers by Helge Karch

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helge Karch

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

Eichhorn, Inga, Torsten Semmler, Alexander Mellmann, et al.. (2018). Microevolution of epidemiological highly relevant non-O157 enterohemorrhagic Escherichia coli of serogroups O26 and O111. International Journal of Medical Microbiology. 308(8). 1085–1095. 4 indexed citations

Marejková, Monika, Alexander Mellmann, Helge Karch, et al.. (2018). Attack of the clones: whole genome-based characterization of two closely related enterohemorrhagic Escherichia coli O26 epidemic lineages. BMC Genomics. 19(1). 647–647. 7 indexed citations

Humpf, Hans‐Ulrich, et al.. (2016). Shiga toxin glycosphingolipid receptors and their lipid membrane ensemble in primary human blood–brain barrier endothelial cells. Glycobiology. 27(1). 99–109. 29 indexed citations

Barth, Stefanie, Lutz Geue, Jens P. Teifke, et al.. (2016). Experimental Infection of Calves with Escherichia coli O104:H4 outbreak strain. Scientific Reports. 6(1). 32812–32812. 18 indexed citations

Müthing, Johannes, Iris Meisen, Wenlan Zhang, et al.. (2012). Promiscuous Shiga toxin 2e and its intimate relationship to Forssman. Glycobiology. 22(6). 849–862. 50 indexed citations

Kunzendorf, Ulrich, Helge Karch, Dirk Werber, & Hermann Haller. (2011). Recent outbreak of hemolytic uremic syndrome in Germany. Kidney International. 80(9). 900–902. 7 indexed citations

Hoffmann, Petra, Jerzy–Roch Nofer, Gottfried Pohlentz, et al.. (2010). Neutral glycosphingolipids in human blood: a precise mass spectrometry analysis with special reference to lipoprotein-associated Shiga toxin receptors. Journal of Lipid Research. 51(8). 2282–2294. 35 indexed citations

Middendorf, Barbara, et al.. (2010). Evolutionary analysis and distribution of type III effector genes in pathogenic Escherichia coli from human, animal and food sources. Environmental Microbiology. 13(2). 439–452. 20 indexed citations

Stephan, Roger, Wenlan Zhang, Martina Bielaszewska, Alexander Mellmann, & Helge Karch. (2009). Phenotypic and Genotypic Traits of Shiga Toxin–Negative E. coli O157:H7/H ⁻ Bovine and Porcine Strains. Foodborne Pathogens and Disease. 6(2). 235–243. 12 indexed citations

10.

Orth‐Höller, Dorothea, Abdul Basit Khan, Asma Naim, et al.. (2009). Shiga Toxin Activates Complement and Binds Factor H: Evidence for an Active Role of Complement in Hemolytic Uremic Syndrome. The Journal of Immunology. 182(10). 6394–6400. 154 indexed citations

11.

Aldick, Thomas, Martina Bielaszewska, Bernt Eric Uhlin, et al.. (2009). Vesicular stabilization and activity augmentation of enterohaemorrhagic Escherichia coli haemolysin. Molecular Microbiology. 71(6). 1496–1508. 57 indexed citations

12.

Distler, Ute, Irena Drmić Hofman, Jörg Haier, et al.. (2009). Shiga Toxin Receptor Gb3Cer/CD77: Tumor-Association and Promising Therapeutic Target in Pancreas and Colon Cancer. PLoS ONE. 4(8). e6813–e6813. 67 indexed citations

13.

Bielaszewska, Martina, Barbara Middendorf, Robin Köck, et al.. (2008). Shiga Toxin–Negative Attaching and EffacingEscherichia coli:Distinct Clinical Associations with Bacterial Phylogeny and Virulence Traits and Inferred In‐Host Pathogen Evolution. Clinical Infectious Diseases. 47(2). 208–217. 88 indexed citations

14.

Eklund, Marjut, Martina Bielaszewska, Ulla‐Maija Nakari, Helge Karch, & A. Siitonen. (2006). Molecular and phenotypic profiling of sorbitol-fermenting Escherichia coli O157:H− human isolates from Finland. Clinical Microbiology and Infection. 12(7). 634–641. 32 indexed citations

15.

Brunder, Werner, Helge Karch, & Herbert Schmidt. (2006). Complete sequence of the large virulence plasmid pSFO157 of the sorbitol-fermenting enterohemorrhagic Escherichia coli O157:H− strain 3072/96. International Journal of Medical Microbiology. 296(7). 467–474. 36 indexed citations

16.

Martín, Unai, A. Sonntag, Barbara Neuhaus, & Helge Karch. (2004). Flächendesinfektion in Pflegeheimen, was geschieht wirklich? Studie zur Erfolgskontrolle in drei Duisburger Pflegeheimen. Das Gesundheitswesen. 66(10). 682–687. 5 indexed citations

17.

Karch, Helge, et al.. (2000). Subtyping of eae-genes in shigatoxin-producing Escherichia coli (STEC). Occurrence in raw or undercooked food samples and comparison of isolates from faecal samples and stool samples.. Die Fleischwirtschaft. 80(2). 84–89. 2 indexed citations

18.

Verweyen, Hege M., Helge Karch, M. Brandis, & Lothar Bernd Zimmerhackl. (2000). Enterohemorrhagic Escherichia coli infections: following transmission routes. Pediatric Nephrology. 14(1). 73–83. 39 indexed citations

19.

Wittstock, Matthias, Herbert Schmidt, Daniel S. Thoma, & Helge Karch. (2000). Heterogeneity of the prtC gene of Porphyromonas gingivalis. Oral Microbiology and Immunology. 15(1). 33–39. 9 indexed citations

20.

Grif, Katharina, et al.. (1999). Shiga toxin-producing Escherichia coli was the third most frequent bacterial cause of diarrhea in Austria during July and August of 1998. Clinical Microbiology and Infection. 5(10). 645–647. 4 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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