Rikke Heidemann Olsen

Rikke Heidemann Olsen

Associate Professor


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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. Published

    A new phenothiazine derivate is active against Clostridioides difficile and shows low cytotoxicity

    Ronco, T., Aragao, F. M., Saaby, Lasse, Christensen, Jørn Bolstad, Permin, A., Williams, Andrew Richard, Thamsborg, Stig Milan & Olsen, Rikke Heidemann, 2021, In: PLoS ONE. 16, 10, 13 p., e0258207.

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

  16. Published

    Efficacy of a novel antimicrobial hydrogel for eradication of Staphylococcus epidermidis, Staphylococcus aureus and Cutibacterium acnes from preformed biofilm and treatment performance in an in vivo MRSA wound model

    Ronco, T., Aragao, M. F., Svenningsen, Søren Wedel, Christensen, Jørn Bolstad, Permin, A., Saaby, Lasse, Bionda, N., Lantz, E. E. & Olsen, Rikke Heidemann, 2021, In: JAC-Antimicrobial Resistance. 3, 3, 7 p., dlab108.

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

  17. Published

    Insight Into the Anti-staphylococcal Activity of JBC 1847 at Sub-Inhibitory Concentration

    Ronco, T., Kappel, L. H., Aragao, M. F., Biagi, N., Svenningsen, Søren Wedel, Christensen, Jørn Bolstad, Permin, A., Saaby, Lasse, Holmstrøm, K., Klitgaard, J. K., Sabat, A. J., Akkerboom, V., Monaco, M., Tinelli, M., Friedrich, A. W., Jana, B. & Olsen, Rikke Heidemann, 2022, In: Frontiers in Microbiology. 12, 786173.

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

  18. 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

  19. 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

  20. Published

    A Novel Promazine Derivative Shows High in vitro and in vivo Antimicrobial Activity Against Staphylococcus aureus

    Ronco, T., Jørgensen, N. S., Holmer, I., Kromann, Sofie, Sheikhsamani, E., Permin, A., Svenningsen, Søren Wedel, Christensen, Jørn Bolstad & Olsen, Rikke Heidemann, 2020, In: Frontiers in Microbiology. 11, 12 p., 560798.

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

  21. Published

    GtxA is a virulence factor that promotes a Th2-like response during Gallibacterium anatis infection in laying hens

    Tang, B., Pors, S. E., Kristensen, B. M., Skjerning, R. B. J., Olsen, Rikke Heidemann & Bojesen, Anders Miki, 2020, In: Veterinary Research. 51, 1, 12 p., 40.

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

  22. Published

    Longitudinal Study on Causes of Mortality in Danish Broiler Breeders

    Thoefner, Ida , Poulsen, Louise Ladefoged, Bisgaard, M., Christensen, Henrik, Olsen, Rikke Heidemann & Christensen, Jens Peter, 2019, In: Avian Diseases. 63, 3, 400-410.

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

  23. 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

  24. 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

  25. 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

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