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Helge Karch

Active 1985–2020

123
Papers
24,988
Citations
95
h-index
123
i10-index

Citations

Citations per year for Helge Karch1986: 2 citations1987: 18 citations1988: 11 citations1989: 28 citations1990: 30 citations1991: 23 citations1992: 33 citations1993: 48 citations1994: 42 citations1995: 66 citations1996: 64 citations1997: 58 citations1998: 159 citations1999: 162 citations2000: 170 citations2001: 175 citations2002: 186 citations2003: 255 citations2004: 234 citations2005: 239 citations2006: 164 citations2007: 216 citations2008: 198 citations2009: 191 citations2010: 181 citations2011: 207 citations2012: 283 citations2013: 233 citations2014: 231 citations2015: 136 citations2016: 134 citations2017: 110 citations2018: 105 citations2019: 467 citations2020: 501 citations2021: 442 citations2022: 289 citations2023: 194 citations2024: 268 citations2025: 103 citations

Citation sources

Countries

World map of the countries and regions citing this authorUnited States: 1,200 citing papers, 21.1% of this breakdownGermany: 553 citing papers, 9.7% of this breakdownUnited Kingdom: 378 citing papers, 6.6% of this breakdownFrance: 316 citing papers, 5.6% of this breakdownChina: 312 citing papers, 5.5% of this breakdownCanada: 233 citing papers, 4.1% of this breakdownAustralia: 191 citing papers, 3.4% of this breakdownSpain: 162 citing papers, 2.8% of this breakdownNetherlands: 157 citing papers, 2.8% of this breakdownItaly: 154 citing papers, 2.7% of this breakdownJapan: 136 citing papers, 2.4% of this breakdownDenmark: 119 citing papers, 2.1% of this breakdown
0%21.1%Other 31.2%

Institutions

Fields

  • Biochemistry, Genetics and Molecular Biology67.3%
  • Medicine10.9%
  • Immunology and Microbiology8.7%
  • Agricultural and Biological Sciences4.6%
  • Environmental Science3.7%
  • Dentistry1.5%
  • Other3.3%

Topics

  • Escherichia coli research studies17.1%
  • Viral gastroenteritis research and epidemiology9.1%
  • Antibiotic Resistance in Bacteria7.4%
  • Salmonella and Campylobacter epidemiology4.5%
  • Bacteriophages and microbial interactions4.1%
  • Bacterial Genetics and Biotechnology2.7%
  • Other55.1%

Coauthors

All papers

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  1. Sex and virulence in Escherichia coli: an evolutionary perspective

    Authors: Thierry Wirth, Daniel Falush, Ruiting Lan, Frances M. Colles, Patience Mensa, Lothar H. Wieler, Helge Karch, Peter R. Reeves, Martin Maiden, Howard Ochman, Mark Achtman - Molecular Microbiology 2006 cited by 2,017

  2. Host cell interactions of outer membrane vesicle-associated virulence factors of enterohemorrhagic Escherichia coli O157: Intracellular delivery, trafficking and mechanisms of cell injury

    Authors: Martina Bielaszewska, Christian Rüter, Andreas Bauwens, Lilo Greune, Kevin-André Jarosch, Daniel Steil, Wenlan Zhang, Xiaohua He, Roland Lloubès, Angelika Fruth, Kwang Sik Kim, M. Alexander Schmidt, Ulrich Dobrindt, Alexander Mellmann, Helge Karch - PLoS Pathogens 2017 cited by 233

  3. Enterohemorrhagic Escherichia coli O157 outer membrane vesicles induce interleukin 8 production in human intestinal epithelial cells by signaling via Toll-like receptors TLR4 and TLR5 and activation of the nuclear factor NF-κB

    Authors: Martina Bielaszewska, Monika Marejková, Andreas Bauwens, Lisa Kunsmann-Prokscha, Alexander Mellmann, Helge Karch - International Journal of Medical Microbiology 2018 cited by 95

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

    Authors: Flemming Scheutz, Louise D. Teel, Lothar Beutin, Denis Piérard, Glenn Buvens, Helge Karch, Alexander Mellmann, Alfredo Caprioli, Rosangela Tozzoli, Stefano Morabito, Nancy Strockbine, Angela R. Melton‐Celsa, María Álvarez Sánchez, Søren Persson, Alison D. O’Brien - Journal of Clinical Microbiology 2012 cited by 824

  5. Enterohemorrhagic Escherichia coli Hemolysin Employs Outer Membrane Vesicles to Target Mitochondria and Cause Endothelial and Epithelial Apoptosis

    Authors: Martina Bielaszewska, Christian Rüter, Lisa Kunsmann, Lilo Greune, Andreas Bauwens, Wenlan Zhang, Thorsten Kuczius, Kwang Sik Kim, Alexander Mellmann, M. Alexander Schmidt, Helge Karch - PLoS Pathogens 2013 cited by 205

  6. Antibiotic-Mediated Modulations of Outer Membrane Vesicles in Enterohemorrhagic Escherichia coli O104:H4 and O157:H7

    Authors: Andreas Bauwens, Lisa Kunsmann, Helge Karch, Alexander Mellmann, Martina Bielaszewska - Antimicrobial Agents and Chemotherapy 2017 cited by 80

  7. Genetic Structure and Distribution of the Colibactin Genomic Island among Members of the Family Enterobacteriaceae

    Authors: Johannes Putze, Claire Hennequin, Jean‐Philippe Nougayrède, Wenlan Zhang, Stefan Homburg, Helge Karch, Marie-Agnès Bringer, Corinne Fayolle, Élisabeth Carniel, Wolfgang Rabsch, Tobias A. Oelschlaeger, Éric Oswald, Christiane Forestier, Jörg Hacker, Ulrich Dobrindt - Infection and Immunity 2009 cited by 320

  8. Characterisation of the Escherichia coli strain associated with an outbreak of haemolytic uraemic syndrome in Germany, 2011: a microbiological study

    Authors: Martina Bielaszewska, Alexander Mellmann, Wenlan Zhang, Robin Köck, Angelika Fruth, Andreas Bauwens, Georg Peters, Helge Karch - The Lancet Infectious Diseases 2011 cited by 760

  9. Virulence from vesicles: Novel mechanisms of host cell injury by Escherichia coli O104:H4 outbreak strain

    Authors: Lisa Kunsmann, Christian Rüter, Andreas Bauwens, Lilo Greune, Malte Glüder, Björn Kemper, Angelika Fruth, Sun Nyunt Wai, Xiaohua He, Roland Lloubès, M. Alexander Schmidt, Ulrich Dobrindt, Alexander Mellmann, Helge Karch, Martina Bielaszewska - Scientific Reports 2015 cited by 161

  10. Effects of Antibiotics on Shiga Toxin 2 Production and Bacteriophage Induction by Epidemic Escherichia coli O104:H4 Strain

    Authors: Martina Bielaszewska, Evgeny A. Idelevich, Wenlan Zhang, Andreas Bauwens, Frieder Schaumburg, Alexander Mellmann, Georg Peters, Helge Karch - Antimicrobial Agents and Chemotherapy 2012 cited by 198

  11. Dissemination of the blaCTX-M-15 gene among Enterobacteriaceae via outer membrane vesicles

    Authors: Martina Bielaszewska, Ondřej Daniel, Helge Karch, Alexander Mellmann - Journal of Antimicrobial Chemotherapy 2020 cited by 47

  12. Prospective Genomic Characterization of the German Enterohemorrhagic Escherichia coli O104:H4 Outbreak by Rapid Next Generation Sequencing Technology

    Authors: Alexander Mellmann, Dag Harmsen, Craig Cummings, Emily B. Zentz, Shana R. Leopold, Alain Rico, Karola Prior, Rafael Szczepanowski, Yongmei Ji, Wenlan Zhang, Stephen F. McLaughlin, John Henkhaus, Benjamin Leopold, Martina Bielaszewska, Rita Prager, Pius Brzoska, Richard Moore, Simone M Guenther, Jonathan M. Rothberg, Helge Karch - PLoS ONE 2011 cited by 771

  13. Identification of Unconventional Intestinal Pathogenic Escherichia coli Isolates Expressing Intermediate Virulence Factor Profiles by Using a Novel Single-Step Multiplex PCR

    Authors: Daniel Müller, Lilo Greune, Gerhard Heusipp, Helge Karch, Angelika Fruth, H. Tschäpe, M. Alexander Schmidt - Applied and Environmental Microbiology 2007 cited by 236

  14. Characterization of Escherichia coli Isolates from Hospital Inpatients or Outpatients with Urinary Tract Infection

    Authors: Francisco Toval, Christian-Daniel Köhler, Ulrich Vogel, Flo ri an Wagenlehner, Alexander Mellmann, Angelika Fruth, Markus A. Schmidt, Helge Karch, Martina Bielaszewska, Ulrich Dobrindt - Journal of Clinical Microbiology 2013 cited by 169

  15. Escherichia coliHarboring Shiga Toxin 2 Gene Variants: Frequency and Association with Clinical Symptoms

    Authors: Alexander W. Friedrich, Martina Bielaszewska, Wenlan Zhang, M Pulz, Thorsten Kuczius, A Ammon, Helge Karch - The Journal of Infectious Diseases 2002 cited by 722

  16. Enterohaemorrhagic Escherichia coli in human medicine

    Authors: Helge Karch, Phillip I. Tarr, Martina Bielaszewska - International Journal of Medical Microbiology 2005 cited by 677

  17. EspP, a novel extracellular serine protease of enterohaemorrhagic Escherichia coli O157:H7 cleaves human coagulation factor V

    Authors: Werner Brunder, Herbert Schmidt, Helge Karch - Molecular Microbiology 1997 cited by 377

  18. Typing of Intimin Genes in Human and Animal Enterohemorrhagic and EnteropathogenicEscherichia coli: Characterization of a New Intimin Variant

    Authors: Éric Oswald, Herbert Schmidt, Stefano Morabito, Helge Karch, Olivier Marchès, Alfredo Caprioli - Infection and Immunity 2000 cited by 428

  19. Shiga toxin-encoding bacteriophages – genomes in motion

    Authors: Sylvia Herold, Helge Karch, Herbert Schmidt - International Journal of Medical Microbiology 2004 cited by 262

  20. Need for Long-term Follow-up in Enterohemorrhagic Escherichia coli–Associated Hemolytic Uremic Syndrome Due to Late-Emerging Sequelae

    Authors: Alejandra Rosales, Johannes Hofer, Lothar‐Bernd Zimmerhackl, Therese Jungraithmayr, Magdalena Riedl, Thomas Giner, Alexander Strasak, Dorothea Orth‐Höller, Reinhard Würzner, Helge Karch, for the German-Austrian HUS Study Group - Clinical Infectious Diseases 2012 cited by 184

  21. A New Shiga Toxin 2 Variant (Stx2f) from Escherichia coli Isolated from Pigeons

    Authors: Herbert Schmidt, J. Scheef, Stefano Morabito, Alfredo Caprioli, Lothar H. Wieler, Helge Karch - Applied and Environmental Microbiology 2000 cited by 321

  22. EspP, a Serine Protease of EnterohemorrhagicEscherichia coli, Impairs Complement Activation by Cleaving Complement Factors C3/C3b and C5

    Authors: Dorothea Orth‐Höller, Silvia Ehrlenbach, Jens Brockmeyer, Abdul Basit Khan, G. Carl Huber, Helge Karch, Bettina Sarg, Herbert Lindner, Reinhard Würzner - Infection and Immunity 2010 cited by 77

  23. PapG subtype-specific binding characteristics of Escherichia coli towards globo-series glycosphingolipids of human kidney and bladder uroepithelial cells

    Authors: Nadine Legros, Stefanie Ptascheck, Gottfried Pohlentz, Helge Karch, Ulrich Dobrindt, Johannes Müthing - Glycobiology 2019 cited by 27

  24. Prevalence of the “High-Pathogenicity Island” of Yersinia Species among Escherichia coli Strains That Are Pathogenic to Humans

    Authors: Sören Schubert, Alexander Rakin, Helge Karch, Élisabeth Carniel, J Heesemann - Infection and Immunity 1998 cited by 386