Rikke Heidemann Olsen

Rikke Heidemann Olsen

Associate Professor


Publication year:
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1 - 50 out of 84Page size: 50
  1. 2008
  2. Published

    Chelonobacter oris gen. nov., sp. nov., a new member of the Pasteurellaceae

    Olsen, Rikke Heidemann, Neubauer, C., Christensen, Henrik, Bojesen, Anders Miki, Hess, M. & Bisgaard, M., 2008.

    Research output: Contribution to conference › Conference abstract for conference › Research

  3. 2009
  4. Published

    Comparative studies on [Pasteurella] testudinis and [P.] testudinis-like bacteria and proposal of Chelonobacter oris gen. nov., sp. nov. as a new member of the family Pasteurellaceae

    Olsen, Rikke Heidemann, Neubauer, C., Christensen, Henrik, Bojesen, Anders Miki, Hess, M. & Bisgaard, M., 2009, In: International Journal of Systematic and Evolutionary Microbiology. 59, 7, p. 1583-1588 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    Impact of Nobilis Escherichia coli inac vaccine on parent stock mortality, first week mortality of broilers, and population diversity of E. coli in vaccinated flocks

    Olsen, Rikke Heidemann, Christensen, Henrik & Bisgaard, M., 2009. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  6. Published

    MLST and MLSA of Enterococcus faecalis isolates demonstrating different lesion types in broiler parents

    Bisgaard, M., Petersen, A., Olsen, Rikke Heidemann & Christensen, Henrik, 2009. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  7. Published

    Molecular characterization of APEC - a precondition for proper understanding and handling of outbreaks

    Olsen, Rikke Heidemann, Bojesen, Anders Miki, Christensen, Henrik & Bisgaard, M., 2009, Proceedings of the 5th WPSA International Symposium on Turkey Production, Berlin, Germany, 2009. Mensch und Buch Verlag, p. 277-285 9 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  8. 2010
  9. Published

    Characterization of pasteurellaceae-like bacteria isolated from clinically affected psittacine birds

    Olsen, Rikke Heidemann, Neubauer, C., Christensen, Henrik, Korczak, B., Bojesen, Anders Miki, Hess, M. & Bisgaard, M., 2010, In: Journal of Applied Microbiology. 108, 4, p. 1235-1243 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Impact of Escherichia coli vaccine on parent stock mortality, first week mortality of broilers and population diversity of E. coli in vaccinated flocks

    Olsen, Rikke Heidemann, Christensen, Henrik, Ewers, C. & Bisgaard, M., 2010, In: Avian Pathology. 39, 4, p. 287-295 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Improved understanding of diseases asssociated with potential bacterial pathogens of poultry to be gained from multilocus sequence typing (MLST)

    Bisgaard, M., Olsen, Rikke Heidemann & Christensen, Henrik, 2010, European Poultry Conference. 4 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

  12. Published

    Multilocus sequence typing of Enterococcus faecalis isolates demonstrating different lesion types in broiler breeders

    Olsen, Rikke Heidemann, Petersen, A., Christensen, Henrik & Bisgaard, M., 2010, In: Avian Pathology. 39, 6, p. 435-440 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. 2011
  14. Published

    Characterization of diversity and virulence traits of Escherichia coli associated with haemorrhagic septicaemia outbreaks in turkeys

    Olsen, Rikke Heidemann, Chadfield, M. S., Christensen, Jens Peter, Scheutz, F., Christensen, Henrik & Bisgaard, M., 2011, 17th World Veterinary Poultry Congress: proceedings. WVPA, p. 471-473 3 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

  15. Published

    Clonality and virulence traits of Escherichia coli associated with hemorrhagic septicaemia in turkeys

    Olsen, Rikke Heidemann, Chadfield, M. S., Christensen, Jens Peter, Scheutz, F., Christensen, Henrik & Bisgaard, M., 2011, In: Avian Pathology. 40, 6, p. 587-595 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Escherichia coli associeret sygdom i konsumægsektoren. Kortlægning af faktorer af betydning for sygdomsudviking og sygdomsforebyggelse

    Bisgaard, M., Olsen, Rikke Heidemann, Kyvsgaard, N. C., Christensen, Jens Peter & Christensen, Henrik, 2011, In: Dansk Erhvervsfjerkrae. 39, p. 130-133 4 p.

    Research output: Contribution to journal › Journal article › Communication

  17. Published

    Genetic diversity of Escherichia coli associated with increased mortality in free-range layers concurrently infected with Histomonas meleagridis as demonstrated by plasmid profiling and multilocus sequence typing (MLST)

    Olsen, Rikke Heidemann, Stockholm, N. M., Permin, A., Christensen, Jens Peter, Christensen, Henrik & Bisgaard, M., 2011, 17th World Veterinary Poultry Congress: proceedings. WVPA, p. 754-756 3 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

  18. Published

    Multi-locus sequence typing and plasmid profile characterization of avian pathogenic Escherichia coli associated with increased mortality in free-range layer flocks

    Olsen, Rikke Heidemann, Stockholm, N. M., Permin, A., Christensen, Jens Peter, Christensen, Henrik & Bisgaard, M., 2011, In: Avian Pathology. 40, 5, p. 437-444 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Transmission and genetic diversity of Enterococcus faecalis among layer chickens during hatch

    Fertner, M. E., Olsen, Rikke Heidemann, Bisgaard, M. & Christensen, Henrik, 2011, In: Acta Veterinaria Scandinavica (Print). 53, 56, 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Virulence factors of Enterococcus faecalis of human and poultry origin seem to confirm the zoonotic potential of E. faecalis.

    Olsen, Rikke Heidemann, Schønheyder, H., Christensen, Henrik & Bisgaard, M., 2011, 17th World Veterinary Poultry Congress: proceedings. WVPA, p. 474-476 3 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

  21. 2012
  22. Published

    Enterococcus faecalis of human and poultry origin share virulence genes supporting the zoonotic potential of E. faecalis

    Olsen, Rikke Heidemann, Schønheyder, H. C., Christensen, Henrik & Bisgaard, M., 2012, In: Zoonoses and Public Health. 59, 4, p. 256-263 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. Published

    An investigation on first-week mortality in layers

    Olsen, Rikke Heidemann, Frantzen, C., Christensen, Henrik & Bisgaard, M., 2012, In: Avian Diseases. 56, 1, p. 51-57 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Comparative genomics of multiple plasmids from APEC associated with clonal outbreaks demonstrates major similarities and identifies several potential vaccine-targets.

    Olsen, Rikke Heidemann, Christensen, Henrik & Bisgaard, M., 2012, In: Veterinary Microbiology. 158, 3-4, p. 384-393 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Population diversity and impact of Enterococcus faecalis in chickens

    Olsen, Rikke Heidemann, 2012, Department of Veterinary Disease Biology, University of Copenhagen. 125 p.

    Research output: Book/Report › Ph.D. thesis › Research

  26. Published

    Transmission and genetic diversity of Enterococcus faecalis during hatch of broiler chicks

    Olsen, Rikke Heidemann, Christensen, Henrik & Bisgaard, M., 2012, In: Veterinary Microbiology. 160, 1-2, p. 214-221 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. 2013
  28. Published

    In vitro and in vivo investigation on genomic stability of Salmonella enterica Typhimurium DT41 obtained from broiler breeders in Denmark

    Barua, H., Lindblom, I. L., Bisgaard, M., Christensen, Jens Peter, Olsen, Rikke Heidemann & Christensen, Henrik, 2013, In: Veterinary Microbiology. 166, 3-4, p. 607-616 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  29. Published

    Hvordan opstår og udvikler bakterielle infektioner sig i store fjerkræflokke

    Christensen, Henrik, Olsen, Rikke Heidemann, Pires dos Santos, T. M. S. & Bisgaard, M., 2013, In: Dansk Erhvervsfjerkrae. 42, 4, p. 216-221 6 p.

    Research output: Contribution to journal › Journal article › Research

  30. 2014
  31. Published

    Extended-spectrum β-lactamase-producing Escherichia coli isolated from poultry: a review of current problems, illustrated with some laboratory findings

    Olsen, Rikke Heidemann, Bisgaard, M., Löhren, U., Robineau, B. & Christensen, Henrik, 2014, In: Avian Pathology. 43, 3, p. 199-208 10 p.

    Research output: Contribution to journal › Review › Research › peer-review

  32. Published

    Variations in virulence of avian pathogenic Escherichia coli demonstrated by the use of a new in vivo infection model

    Pors, S. E., Olsen, Rikke Heidemann & Christensen, Jens Peter, 2014, In: Veterinary Microbiology. 170, 3-4, p. 368-374 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. 2015
  34. Published

    Draft genome sequences of five clinical Enterococcus cecorum strains isolated from different poultry species in Poland

    Dolka, B., Olsen, Rikke Heidemann, Thoefner, Ida & Christensen, Jens Peter, 2015, In: Genome Announcements. 3, 5, 2 p., e01085-15.

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    Draft genome sequences of three Escherichia coli strains with different In Vivo pathogenicities in an avian (Ascending) infection model of the oviduct

    Olsen, Rikke Heidemann, Thoefner, Ida , Pors, S. E., Christensen, Henrik, Bisgaard, M. & Christensen, Jens Peter, 2015, In: Genome Announcements. 3, 3, 2 p., e00399-15 .

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. Published

    Longitudinal study of mortality observed in four broiler breeder flocks

    Thoefner, Ida , Poulsen, Louise Ladefoged, Bisgaard, M., Christensen, Henrik, Olsen, Rikke Heidemann & Christensen, Jens Peter, Sep 2015, 19th World Veterinary Poultry Association Congress. Cape Town, p. 148-148 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research › peer-review

  37. Published

    Systemic reactive amyloidosis - an age related problem of importance in broiler breeders

    Thoefner, Ida , Poulsen, Louise Ladefoged, Bisgaard, M., Christensen, Henrik, Olsen, Rikke Heidemann & Christensen, Jens Peter, Sep 2015.

    Research output: Contribution to conference › Poster › Research › peer-review

  38. Published

    Draft genome sequences of two commensal Enterococcus cecorum strains isolated from chickens in Belgium

    Dolka, B., Boyen, F., Butaye, P., Olsen, Rikke Heidemann, Thoefner, Ida & Christensen, Jens Peter, 24 Sep 2015, In: Genome Announcements. 3, 5, 2 p., e01108-15.

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. 2016
  40. Published

    Beskytter E. coli autovacciner mod æggeleder- og bughindebetændelse under eksperimentelle forhold?

    Thoefner, Ida , Ronco, T., Christensen, Jens Peter, Pedersen, K. & Olsen, Rikke Heidemann, 2016, In: Dansk Erhvervsfjerkrae. 45, 11, p. 42-45

    Research output: Contribution to journal › Journal article › Research

  41. Published

    Draft Genome Sequences of Two Avian Pathogenic Escherichia coli Strains of Clinical Importance, E44 and E51

    Ronco, T., Stegger, M., Andersen, P. S., Pedersen, K., Li, L., Thoefner, Ida & Olsen, Rikke Heidemann, 2016, In: Genome Announcements. 4, 4, 2 p., e00768-16.

    Research output: Contribution to journal › Journal article › Research › peer-review

  42. Published

    Experimental induced avian E. coli salpingitis: significant impact of strain and host factors on the clinical and pathological outcome

    Olsen, Rikke Heidemann, Thoefner, Ida , Pors, S. E., Pires dos Santos, T. M. S. & Christensen, Jens Peter, 2016, In: Veterinary Microbiology. 188, p. 59-66 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    Pathology and Molecular Characterization of Escherichia Coli Associated With the Avian Salpingitis-Peritonitis Disease Syndrome

    Olsen, Rikke Heidemann, Bisgaard, M., Christensen, Jens Peter, Kabell, S. & Christensen, Henrik, Mar 2016, In: Avian Diseases. 60, 1, p. 1-7 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. Published

    Antimicrobial Resistance and Resistance Genes in Aerobic Bacteria Isolated from Pork at Slaughter

    Li, L., Olsen, Rikke Heidemann, Ye, L., Yan, H., Nie, Q., Meng, H. & Shi, L., Apr 2016, In: Journal of Food Protection. 79, 4, p. 589-597 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  45. Published

    Characterization of Antimicrobial Resistance of Listeria monocytogenes Strains Isolated from a Pork Processing Plant and Its Respective Meat Markets in Southern China

    Li, L., Olsen, Rikke Heidemann, Ye, L., Wang, W., Shi, L., Yan, H. & Meng, H., May 2016, In: Foodborne pathogens and disease. 13, 5, p. 262-668 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. Published

    Escherichia coli in industrial poultry production: aspects of transmission and disease development

    Christensen, Jens Peter, Pors, S. E., Papasolomontos, S., Poulsen, Louise Ladefoged, Thoefner, Ida , Olsen, Rikke Heidemann, Christensen, Henrik & Bisgaard, M., Jun 2016, 16th International Conference on Production Diseases in Farm Animals: Book of abstracts. Wageningen Academic Publishers, p. 140 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research › peer-review

  47. Published

    Infections with Gram positive cocci in broiler breeders: significance and prevalence

    Thoefner, Ida , Poulsen, Louise Ladefoged, Olsen, Rikke Heidemann, Christensen, Henrik, Bisgaard, M. & Christensen, Jens Peter, Jun 2016, 16th International Conference on Production Diseases in Farm Animals: Book of abstracts. Wageningen, Netherlands: Wageningen Academic Publishers, p. 141-141 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  48. Published

    Investigations of the pathogenesis of Staphylococcus aureus and Enterococcus faecalis in an experimental footpad infection model in broiler breeders

    Thoefner, Ida , Olsen, Rikke Heidemann, Poulsen, Louise Ladefoged, Christensen, Henrik, Bisgaard, M. & Christensen, Jens Peter, Oct 2016, Vetpath 2016 conference abstracts. Prato, p. 5-5 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research › peer-review

  49. Published

    Characterization of a plasmid carrying cat, ermB and tetS genes in a foodborne Listeria monocytogenes strain and uptake of the plasmid by cariogenic Streptococcus mutans

    Li, L., Olsen, Rikke Heidemann, Shi, L., Ye, L., He, J. & Meng, H., 5 Dec 2016, In: International Journal of Food Microbiology. 238, p. 68-71 4 p.

    Research output: Contribution to journal › Letter › Research › peer-review

  50. 2017
  51. Published

    Insight into synergetic mechanisms of tetracycline and the selective serotonin reuptake inhibitor, sertraline, in a tetracycline-resistant strain of Escherichia coli

    Li, L., Kromann, Sofie, Olsen, John Elmerdahl, Svenningsen, Søren Wedel & Olsen, Rikke Heidemann, 2017, In: Journal of Antibiotics. 70, 9, p. 944-953 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  52. Published

    Longitudinal study of transmission of Escherichia coli from broiler breeders to broilers

    Poulsen, Louise Ladefoged, Thoefner, Ida , Bisgaard, M., Christensen, Jens Peter, Olsen, Rikke Heidemann & Christensen, Henrik, 2017, In: Veterinary Microbiology. 207, p. 13-18

    Research output: Contribution to journal › Journal article › Research › peer-review

  53. Published

    Staphylococcus agnetis, a potential pathogen in broiler breeders

    Poulsen, Louise Ladefoged, Thoefner, Ida , Bisgaard, M., Olsen, Rikke Heidemann, Christensen, Jens Peter & Christensen, Henrik, 2017, In: Veterinary Microbiology. 212, p. 1-6 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  54. Published

    Treatment with high-dose antidepressants severely exacerbates the pathological outcome of experimental Escherichia coli infections in poultry

    Kromann, Sofie, Kudirkiene, E., Li, L., Thoefner, Ida , Daldorph, E., Christensen, Jens Peter, Meng, H. & Olsen, Rikke Heidemann, 2017, In: PLoS ONE. 12, 10, 15 p., e0185914.

    Research output: Contribution to journal › Journal article › Research › peer-review

  55. Published

    Spread of avian pathogenic Escherichia coli ST117 O78:H4 in Nordic broiler production

    Ronco, T., Stegger, M., Olsen, Rikke Heidemann, Sekse, C., Nordstoga, A. B., Pohjanvirta, T., Lilje, B., Lyhs, U., Andersen, P. S. & Pedersen, K., 3 Jan 2017, In: BMC Genomics. 18, 8 p., 13.

    Research output: Contribution to journal › Journal article › Research › peer-review

  56. Published

    Chromosomal features of Escherichia coli serotype O2:K2, an avian pathogenic E. coli

    Jørgensen, S. L., Kudirkiene, E., Li, L., Christensen, Jens Peter, Olsen, John Elmerdahl, Nolan, L. K. & Olsen, Rikke Heidemann, 10 May 2017, In: Standards in Genomic Sciences. 12, 9 p., 33.

    Research output: Contribution to journal › Journal article › Research › peer-review

  57. Published

    Evaluation of the efficacy of an autogenous Escherichia coli vaccine in broiler breeders

    Li, L., Thoefner, Ida , Christensen, Jens Peter, Ronco, T., Pedersen, K. & Olsen, Rikke Heidemann, Jun 2017, In: Avian pathology : journal of the W.V.P.A. 46, 3, p. 300-308 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  58. Published

    Impact of egg disinfection of hatching eggs on the eggshell microbiome and bacterial load

    Olsen, Rikke Heidemann, Kudirkiene, E., Thoefner, Ida , Pors, S., Karlskov-Mortensen, Peter, Li, L., Papasolomontos, S., Angastiniotou, C. & Christensen, Jens Peter, Nov 2017, In: Poultry Science. 96, 11, p. 3901-3911

    Research output: Contribution to journal › Journal article › Research › peer-review

  59. 2018
  60. Published

    Transmission and pathogenicity of Gallibacterium anatis and Escherichia coli in embryonated eggs

    Wang, C., Pors, S. E., Olsen, Rikke Heidemann & Bojesen, Anders Miki, 2018, In: Veterinary Microbiology. 217, p. 76-81 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  61. Published

    Characterization of prevalent bacterial pathogens associated with pododermatitis in table egg layers

    Olsen, Rikke Heidemann, Christensen, Henrik, Kabell, S. & Bisgaard, M., 4 May 2018, In: Avian Pathology. 47, 3, p. 281-285 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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