Dag Harmsen

• 317Impact points

• 80Publications

• 20Followers

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Publications

• Comparison of Multilocus Variable-Number Tandem-Repeats Analysis and Multilocus Sequence Typing for the Differentiation of Hemolytic Uremic Syndrome-Associated Escherichia coli (HUSEC) Collection.

  Authors: Christian Jenke, Björn Arne Lindstedt, Dag Harmsen, Helge Karch, Lin Thorstensen Brandal, Alexander Mellmann

  Journal of clinical microbiology.

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

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

  PloS one. 6(7):e22751.

• MIRU-VNTRplus: a web tool for polyphasic genotyping of Mycobacterium tuberculosis complex bacteria.

  Authors: Thomas Weniger, Justina Krawczyk, Philip Supply, Stefan Niemann, Dag Harmsen

  Nucleic acids research.

• Phylogenetic Analysis of Enterohemorrhagic Escherichia coli O157, Germany, 1987-2008.

  Authors: Christian Jenke, Dag Harmsen, Thomas Weniger, Jorg Rothganger, Eija Hyytia-Trees, Martina Bielaszewska, Helge Karch, Alexander Mellmann

  Emerging infectious diseases. 16(4):610-6.

• Comparison of Traditional Phenotypic Identification Methods with Partial 5' 16S rRNA Gene Sequencing for Species-Level Identification of Non-Fermenting Gram-Negative Bacilli.

  Authors: Joann L Cloud, Dag Harmsen, Peter C. Iwen, James J. Dunn, Gerri Hall, Paul Rocco LaSala, Karen Hoggan, Deborah Wilson, Gail L Woods, Alexander Mellmann

  Journal of clinical microbiology.

• Geographic distribution of Staphylococcus aureus causing invasive infections in Europe: a molecular-epidemiological analysis.

  Authors: Hajo Grundmann, David M Aanensen, Cees C van den Wijngaard, Brian G Spratt, Dag Harmsen, Alexander W Friedrich

  PLoS medicine. 7(1):e1000215.

• High Inter-Laboratory Reproducibility of MALDI-TOF Mass Spectrometry-Based Species Identification of Nonfermenting Bacteria.

  Authors: A Mellmann, F Bimet, C Bizet, A. D. Borovskaya, R. R. Drake, U Eigner, A M Fahr, Y. He, E. N. Ilina, M Kostrzewa, T Maier, L Mancinelli, W. Moussaoui, G Prévost, L Putignani, C. L. Seachord, Y. W. Tang, D Harmsen

  Journal of clinical microbiology.

• Phylogeny and disease association of Shiga toxin-producing Escherichia coli O91.

  Authors: Alexander Mellmann, Angelika Fruth, Alexander W Friedrich, Lothar H Wieler, Dag Harmsen, Dirk Werber, Barbara Middendorf, Martina Bielaszewska, Helge Karch

  Emerging infectious diseases. 15(9):1474-7.

• Cross-border comparison of the admission prevalence and clonal structure of meticillin-resistant Staphylococcus aureus.

  Authors: R Köck, L Brakensiek, A Mellmann, F Kipp, M Henderikx, D Harmsen, I Daniels-Haardt, C von Eiff, K Becker, M G R Hendrix, A W Friedrich

  The Journal of hospital infection.

• EUREGIO MRSA-net Twente/Münsterland--a Dutch-German cross-border network for the prevention and control of infections caused by methicillin-resistant Staphylococcus aureus.

  Authors: A W Friedrich, I Daniels-Haardt, R Köck, F Verhoeven, A Mellmann, D Harmsen, J. E. van Gemert-Pijnen, K Becker, M G R Hendrix

  Euro surveillance : bulletin européen sur les maladies transmissibles = European communicable disease bulletin. 13(35).

• Analysis of collection of hemolytic uremic syndrome-associated enterohemorrhagic Escherichia coli.

  Authors: Alexander Mellmann, Martina Bielaszewska, Robin Köck, Alexander W Friedrich, Angelika Fruth, Barbara Middendorf, Dag Harmsen, M Alexander Schmidt, Helge Karch

  Emerging infectious diseases. 14(8):1287-90.

• EpiScanGIS: an online geographic surveillance system for meningococcal disease.

  Authors: Markus Reinhardt, Johannes Elias, Jurgen Albert, Matthias Frosch, Dag Harmsen, Ulrich Vogel

  International journal of health geographics. 7(1):33.

• Characterization of clonal relatedness among the natural population of Staphylococcus aureus strains by using spa sequence typing and the BURP (based upon repeat patterns) algorithm.

  Authors: Alexander Mellmann, Thomas Weniger, Christoph Berssenbrügge, Ursula Keckevoet, Alexander W Friedrich, Dag Harmsen, Hajo Grundmann

  Journal of clinical microbiology. 46(8):2805-8.

• Evaluation of matrix-assisted laser desorption ionization-time-of-flight mass spectrometry in comparison to 16S rRNA gene sequencing for species identification of nonfermenting bacteria.

  Authors: A Mellmann, J Cloud, T Maier, U Keckevoet, I Ramminger, P Iwen, J Dunn, G Hall, D Wilson, P Lasala, M Kostrzewa, D Harmsen

  Journal of clinical microbiology. 46(6):1946-54.

• Evaluation and user-strategy of MIRU-VNTRplus, a multifunctional database for on-line analysis of genotyping data and phylogenetic identification of Mycobacterium tuberculosis complex isolates.

  Authors: Caroline Allix-Béguec, Dag Harmsen, Thomas Weniger, Philip Supply, Stefan Niemann

  Journal of clinical microbiology.

• Acinetobacter septicus sp. nov. association with a nosocomial outbreak of bacteremia in a neonatal intensive care unit.

  Authors: Abdullah Kilic, Haijing Li, Alexander Mellmann, Ahmet C Basustaoglu, Mustafa Kul, Zeynep Senses, Hakan Aydogan, Charles W Stratton, Dag Harmsen, Yi-Wei Tang

  Journal of clinical microbiology. 46(3):902-8.

• Recycling of Shiga toxin 2 genes in sorbitol-fermenting enterohemorrhagic Escherichia coli O157:NM.

  Authors: Alexander Mellmann, Shan Lu, Helge Karch, Jian-Guo Xu, Dag Harmsen, M Alexander Schmidt, Martina Bielaszewska

  Applied and environmental microbiology. 74(1):67-72.

• EpiScanGIS: an online geographic surveillance system for meningococcal disease

  Authors: Markus Reinhardt, Johannes Elias, Jürgen Albert, Matthias Frosch, Dag Harmsen, Ulrich Vogel

  International Journal of Health Geographics.

• Based Upon Repeat Pattern (BURP): an algorithm to characterize the long-term evolution of Staphylococcus aureus populations based on spa polymorphisms.

  Authors: Alexander Mellmann, Thomas Weniger, Christoph Berssenbrügge, Jörg Rothgänger, Michael Sammeth, Jens Stoye, Dag Harmsen

  BMC microbiology. 7:98.

• Based Upon Repeat Pattern (BURP): an algorithm to characterize the long-term evolution of Staphylococcus aureus populations based on spa polymorphisms

  Authors: Alexander Mellmann, Thomas Weniger, Christoph Berssenbrügge, Jörg Rothgänger, Michael Sammeth, Jens Stoye, Dag Harmsen

  BMC Microbiology.

• Direct trapping of formaldehyde formed via oxidative N-demethylation of N,N-dialkylarylamines by Bacillus megaterium using cysteamine derivatization.

  Authors: Marcus Taupp, Frank Heckel, Dag Harmsen, Peter Schreier

  Journal of microbiological methods. 67(2):357-62.

• Spatiotemporal analysis of invasive meningococcal disease, Germany.

  Authors: Johannes Elias, Dag Harmsen, Heike Claus, Wiebke Hellenbrand, Matthias Frosch, Ulrich Vogel

  Emerging infectious diseases. 12(11):1689-95.

• Assignment of Staphylococcus isolates to groups by spa typing, SmaI macrorestriction analysis, and multilocus sequence typing.

  Authors: B Strommenger, C Kettlitz, T Weniger, D Harmsen, A W Friedrich, W Witte

  Journal of clinical microbiology. 44(7):2533-40.

• High interlaboratory reproducibility of DNA sequence-based typing of bacteria in a multicenter study.

  Authors: M Aires de Sousa, K Boye, H de Lencastre, A Deplano, M C Enright, J Etienne, A Friedrich, D Harmsen, A Holmes, X.W. Huijsdens [......] J K Rasheed, E. Spalburg, B Strommenger, M J Struelens, F C Tenover, J Thomas, U Vogel, H Westh, J Xu, W Witte

  Journal of clinical microbiology. 44(2):619-21.

• Ridom TraceEdit: a DNA trace editor and viewer.

  Authors: Jörg Rothgänger, Markus Weniger, Thomas Weniger, Alexander Mellmann, Dag Harmsen

  Bioinformatics (Oxford, England). 22(4):493-4.

• Automated DNA sequence-based early warning system for the detection of methicillin-resistant Staphylococcus aureus outbreaks.

  Authors: Alexander Mellmann, Alexander W Friedrich, Nicole Rosenkötter, Jörg Rothgänger, Helge Karch, Ralf Reintjes, Dag Harmsen

  PLoS medicine. 3(3):e33.

• Sequencing and staphylococci identification.

  Authors: Alexander Mellmann, Karsten Becker, Christof von Eiff, Ursula Keckevoet, Peter Schumann, Dag Harmsen

  Emerging infectious diseases. 12(2):333-6.

• SeqNet.org: a European laboratory network for sequence-based typing of microbial pathogens.

  Authors: A W Friedrich, W Witte, D Harmsen, H de Lencastre, W Hryniewicz, J Scheres, H Westh

  Euro surveillance : bulletin européen sur les maladies transmissibles = European communicable disease bulletin. 11(1):E060112.4.

• Production of natural methyl anthranilate by microbial N-demethylation of N-methyl methyl anthranilate by the topsoil-isolated bacterium Bacillus megaterium.

  Authors: Marcus Taupp, Dag Harmsen, Frank Heckel, Peter Schreier

  Journal of agricultural and food chemistry. 53(24):9586-9.

• Enterohemorrhagic Escherichia coli in human infection: in vivo evolution of a bacterial pathogen.

  Authors: Alexander Mellmann, Martina Bielaszewska, Lothar B Zimmerhackl, Rita Prager, Dag Harmsen, Helmut Tschäpe, Helge Karch

  Clinical infectious diseases : an official publication of the Infectious Diseases Society of America. 41(6):785-92.

• [Evidence-based infection control methods using spa genotyping for MRSA spread in hospitals]

  Authors: A Mellmann, A W Friedrich, F Kipp, F Hinder, U Keckevoet, D Harmsen

  Deutsche medizinische Wochenschrift (1946). 130(22):1364-8.

• DNA sequence-based tandem repeat analysis of the clfB gene is less discriminatory than spa typing for methicillin-resistant Staphylococcus aureus.

  Authors: Dag Harmsen, Heike Claus, Ulrich Vogel

  International journal of medical microbiology : IJMM. 294(8):525-8.

• Emergence of methicillin-resistant Staphylococcus aureus with Panton-Valentine leukocidin genes in central Europe.

  Authors: W Witte, C Braulke, C Cuny, B Strommenger, G Werner, D Heuck, U Jappe, C Wendt, H J Linde, D Harmsen

  European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology. 24(1):1-5.

• Variation of the polymorphic region X of the protein A gene during persistent airway infection of cystic fibrosis patients reflects two independent mechanisms of genetic change in Staphylococcus aureus.

  Authors: Barbara C Kahl, Alexander Mellmann, Susanne Deiwick, Georg Peters, Dag Harmsen

  Journal of clinical microbiology. 43(1):502-5.

• Sequence-based typing of flaB is a more stable screening tool than typing of flaA for monitoring of Campylobacter populations.

  Authors: Alexander Mellmann, Jan Mosters, Edda Bartelt, Peter Roggentin, Andrea Ammon, Alexander W Friedrich, Helge Karch, Dag Harmsen

  Journal of clinical microbiology. 42(10):4840-2.

• Development and evaluation of a quality-controlled ribosomal sequence database for 16S ribosomal DNA-based identification of Staphylococcus species.

  Authors: Karsten Becker, Dag Harmsen, Alexander Mellmann, Christian Meier, Peter Schumann, Georg Peters, Christof von Eiff

  Journal of clinical microbiology. 42(11):4988-95.

• Reassessment of sequence-based targets for identification of bacillus species.

  Authors: K S Blackwood, C Y Turenne, D Harmsen, A M Kabani

  Journal of clinical microbiology. 42(4):1626-30.

• Evaluation of partial 16S ribosomal DNA sequencing for identification of nocardia species by using the MicroSeq 500 system with an expanded database.

  Authors: Joann L Cloud, Patricia S Conville, Ann Croft, Dag Harmsen, Frank G Witebsky, Karen C Carroll

  Journal of clinical microbiology. 42(2):578-84.

• Typing of methicillin-resistant Staphylococcus aureus in a university hospital setting by using novel software for spa repeat determination and database management.

  Authors: Dag Harmsen, Heike Claus, Wolfgang Witte, Jörg Rothgänger, Hermann Claus, Doris Turnwald, Ulrich Vogel

  Journal of clinical microbiology. 41(12):5442-8.

• RIDOM: comprehensive and public sequence database for identification of Mycobacterium species.

  Authors: Dag Harmsen, Stefan Dostal, Andreas Roth, Stefan Niemann, Jörg Rothgänger, Michael Sammeth, Jürgen Albert, Matthias Frosch, Elvira Richter

  BMC infectious diseases. 3:26.

• Evaluation of RIDOM, MicroSeq, and Genbank services in the molecular identification of Nocardia species.

  Authors: Alexander Mellmann, Joann L Cloud, Sebastian Andrees, Kym Blackwood, Karen C Carroll, Amin Kabani, Andreas Roth, Dag Harmsen

  International journal of medical microbiology : IJMM. 293(5):359-70.

• QAlign: quality-based multiple alignments with dynamic phylogenetic analysis.

  Authors: M. Sammeth, J Rothgänger, W Esser, J Albert, J. Stoye, D Harmsen

  Bioinformatics (Oxford, England). 19(12):1592-3.

• Phylogeny of the genus Nocardia based on reassessed 16S rRNA gene sequences reveals underspeciation and division of strains classified as Nocardia asteroides into three established species and two unnamed taxons.

  Authors: Andreas Roth, Sebastian Andrees, Reiner M Kroppenstedt, Dag Harmsen, Harald Mauch

  Journal of clinical microbiology. 41(2):851-6.

• RIDOM: Comprehensive and public sequence database for identification of Mycobacterium species

  Authors: Dag Harmsen, Stefan Dostal, Andreas Roth, Stefan Niemann, Jörg Rothgänger, Michael Sammeth, Jürgen Albert, Matthias Frosch, Elvira Richter

  BMC Infectious Diseases.

• Selective (R)-3-hydroxylation of FA by Stenotrophomonas maltophilia.

  Authors: Kerstin Weil, Patrick Gruber, Frank Heckel, Dag Harmsen, Peter Schreier

  Lipids. 37(3):317-23.

• RIDOM: Ribosomal Differentiation of Medical Micro-organisms Database.

  Authors: Dag Harmsen, Jörg Rothgänger, Matthias Frosch, Jürgen Albert

  Nucleic acids research. 30(1):416-7.

• Description of Mycobacterium heckeshornense sp. nov.

  Authors: E Richter, S Niemann, S Ruesch-Gerdes, D Harmsen

  Journal of clinical microbiology. 39(8):3023-4.

• Diagnostics of neisseriaceae and moraxellaceae by ribosomal DNA sequencing: ribosomal differentiation of medical microorganisms.

  Authors: D Harmsen, C Singer, J Rothgänger, T Tønjum, G S de Hoog, H Shah, J Albert, M Frosch

  Journal of clinical microbiology. 39(3):936-42.

• Differentiation of clinical Mycobacterium tuberculosis complex isolates by gyrB DNA sequence polymorphism analysis.

  Authors: S Niemann, D Harmsen, S Rüsch-Gerdes, E Richter

  Journal of clinical microbiology. 38(9):3231-4.

• Molecular and phenotypic identification of the yeast pathogen Candida dubliniensis.

  Authors: O Kurzai, H C Korting, D Harmsen, W Bautsch, M Molitor, M Frosch, F A Mühlschlegel

  Journal of molecular medicine (Berlin, Germany). 78(9):521-9.