Rikke Heidemann Olsen

Rikke Heidemann Olsen

Associate Professor


  1. 2023
  2. Published

    A SEVERE OUTBREAK OF COLIBACILLOSIS IN BROILERS

    Kromann, Sofie, Baig, S. J., Olsen, Rikke Heidemann, Edslev, S. M., Thoefner, Ida , Bojesen, Anders Miki, Jensen, Henrik Elvang & Stegger, M., 29 Aug 2023.

    Research output: Contribution to conferenceConference abstract for conferenceCommunication

  3. Published

    Antimicrobial Activity of Sertraline on Listeria monocytogenes

    Wang, Y., Li, L., Cai, P., Olsen, Rikke Heidemann, Peng, S. & Meng, H., 2023, In: International Journal of Molecular Sciences. 24, 5, 4678.

    Research output: Contribution to journalJournal articlepeer-review

  4. Published

    Dramatic increase in slaughter condemnations due to Escherichia coli ST23 and ST101 within the Danish broiler production

    Kromann, Sofie, Baig, S., Olsen, Rikke Heidemann, Edslev, S. M., Thoefner, Ida , Bojesen, Anders Miki, Jensen, Henrik Elvang & Stegger, M., 2023, In: Veterinary Microbiology. 280, 109696.

    Research output: Contribution to journalJournal articlepeer-review

  5. Published

    Efflux Pumps and Different Genetic Contexts of tet(X4) Contribute to High Tigecycline Resistance in Escherichia fergusonii from Pigs

    Wang, J., Wan, X., Meng, H., Olsen, Rikke Heidemann, Chen, X. & Li, L., 2023, In: International Journal of Molecular Sciences. 24, 8, 10 p., 6923.

    Research output: Contribution to journalJournal articlepeer-review

  6. Published

    Establishment and application of an aerogenous model of avian colibacillosis

    Kromann, Sofie, Olsen, Rikke Heidemann, Bojesen, Anders Miki, Thoefner, Ida & Jensen, Henrik Elvang, 2023.

    Research output: Contribution to conferenceConference abstract for conferenceCommunication

  7. Published

    Inhibition of Plasmid Conjugation in Escherichia coli by Targeting rbsB Gene Using CRISPRi System

    Xiao, Y., Zhang, Y., Xie, F., Olsen, Rikke Heidemann, Shi, L. & Li, L., 2023, In: International Journal of Molecular Sciences. 24, 13, 10585.

    Research output: Contribution to journalJournal articlepeer-review

  8. Published

    The hygienic aspects in the management of strangles

    Fridberg, A., Adler, Ditte Marie Top, Jørgensen, M. G. & Olsen, Rikke Heidemann, 2023, In: Equine Veterinary Education. 35, 10, p. 540-550

    Research output: Contribution to journalReviewpeer-review

  9. 2022
  10. Published

    Antibiotic resistance and polymyxin B resistance mechanism of Aeromonas spp. isolated from yellow catfish, hybrid snakeheads and associated water from intensive fish farms in Southern China

    Li, L., Yao, R., Olsen, Rikke Heidemann, Zhang, Y. & Meng, H., 2022, In: LWT. 166, 113802.

    Research output: Contribution to journalJournal articlepeer-review

  11. Published
  12. Published

    Characterization of extended-spectrum cephalosporins and fluoroquinolone resistance of a Salmonella enterica serovar Thompson isolate from ready-to-eat pork product in China

    Li, L., Olsen, Rikke Heidemann, Xiao, J., Liang, M., Meng, H. & Peng, S., 2022, In: Frontiers in Microbiology. 13, 964009.

    Research output: Contribution to journalJournal articlepeer-review

  13. Published

    Engineering a CRISPR interference system targeting AcrAB-TolC efflux pump to prevent multidrug resistance development in Escherichia coli

    Wan, X., Li, Q., Olsen, Rikke Heidemann, Meng, H., Zhang, Z., Wang, J., Zheng, H., Li, L. & Shi, L., 2022, In: The Journal of antimicrobial chemotherapy. 77, 8, p. 2158-2166 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  14. Published

    Epidemiological Prevalence of Phenotypical Resistances and Mobilised Colistin Resistance in Avian Commensal and Pathogenic E. coli from Denmark, France, The Netherlands, and the UK

    Mead, A., Billon-Lotz, C., Olsen, Rikke Heidemann, Swift, B., Richez, P., Stabler, R. & Pelligand, L., 2022, In: Antibiotics. 11, 5, 631.

    Research output: Contribution to journalJournal articlepeer-review

  15. Published

    Exploring the resistome, virulome, mobilome and microbiome along pork production chain using metagenomics

    Li, L., Xiao, Y., Wang, C., Olsen, Rikke Heidemann, Meng, H. & Shi, L., 2022, In: International Journal of Food Microbiology. 371, 109674.

    Research output: Contribution to journalJournal articlepeer-review

  16. Published

    Genetic context of blaCTX–M–55 and qnrS1 genes in a foodborne Salmonella enterica serotype Saintpaul isolate from China

    Li, L., Olsen, Rikke Heidemann, Xiao, J., Meng, H., Peng, S. & Shi, L., 2022, In: Frontiers in Microbiology. 13, 899062.

    Research output: Contribution to journalJournal articlepeer-review

  17. Published

    Genomic Characterization of mcr-1-Carrying Foodborne Salmonella enterica serovar Typhimurium and Identification of a Transferable Plasmid Carrying mcr-1, blaCTX-M-14, qnrS2, and oqxAB Genes From Ready-to-Eat Pork Product in China

    Li, L., Wan, X., Olsen, Rikke Heidemann, Xiao, J., Wang, C., Xu, X., Meng, H. & Shi, L., 2022, In: Frontiers in Microbiology. 13, 903268.

    Research output: Contribution to journalJournal articlepeer-review

  18. 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 journalJournal articlepeer-review

  19. Published
  20. Published

    Short- and long-read metagenomics insight into the genetic contexts and hosts of mobile antibiotic resistome in Chinese swine farms

    Li, L., Xiao, Y., Olsen, Rikke Heidemann, Wang, C., Meng, H. & Shi, L., 2022, In: Science of the Total Environment. 827, 154352.

    Research output: Contribution to journalJournal articlepeer-review

  21. 2021
  22. 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 journalJournal articlepeer-review

  23. Published

    Characterization of a Streptococcus species isolated from Siganus guttatus in South China

    Li, L., Wang, C., Olsen, Rikke Heidemann, Li, X., Meng, H., Xu, L. & Shi, L., 2021, In: Aquaculture. 545, 737163.

    Research output: Contribution to journalJournal articlepeer-review

  24. Published

    Development of an aerogenous Escherichia coli infection model in adult broiler breeders

    Kromann, Sofie, Olsen, Rikke Heidemann, Bojesen, Anders Miki, Jensen, Henrik Elvang & Thoefner, Ida , 2021, In: Scientific Reports. 11, 15 p., 19556.

    Research output: Contribution to journalJournal articlepeer-review

  25. 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 journalJournal articlepeer-review

  26. Published

    First Report of a Foodborne Salmonella enterica Serovar Gloucester (4:i:l,w) ST34 Strain Harboring blaCTX–M–55 and qnrS Genes Located in IS26-Mediated Composite Transposon

    Li, L., Olsen, Rikke Heidemann, Song, A., Xiao, J., Wang, C., Meng, H. & Shi, L., 2021, In: Frontiers in Microbiology. 12, 646101.

    Research output: Contribution to journalJournal articlepeer-review

  27. Published

    First report of two foodborne Salmonella enterica subsp. enterica serovar Bovismorbificans isolates carrying a novel mega-plasmid harboring blaDHA-1 and qnrB4 genes

    Li, L., Olsen, Rikke Heidemann, Wang, C., Song, A., Xiao, J., Meng, H., Ronco, T. & Shi, L., 2021, In: International Journal of Food Microbiology. 360, 109439.

    Research output: Contribution to journalJournal articlepeer-review

  28. Published
  29. 2020
  30. 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 journalJournal articlepeer-review

  31. Published

    A novel derivative of thioridazine shows low toxicity and efficient activity against gram‐positive pathogens

    Jørgensen, N. S., Saaby, Lasse, Andersson, A. M., Kromann, Sofie, Sheikhsamani, E., Permin, A., Ronco, T., Svenningsen, Søren Wedel, Christensen, Jørn Bolstad & Olsen, Rikke Heidemann, 2020, In: Antibiotics. 9, 6, 11 p., 327.

    Research output: Contribution to journalJournal articlepeer-review

  32. 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 journalJournal articlepeer-review

  33. 2019
  34. Published

    Correlation between footpad lesions and systemic bacterial infections in broiler breeders

    Thoefner, Ida , Poulsen, Louise Ladefoged, Bisgaard, M., Christensen, Henrik, Olsen, Rikke Heidemann & Christensen, Jens Peter, 2019, In: Veterinary Research. 50, 1, 5 p., 38.

    Research output: Contribution to journalJournal articlepeer-review

  35. Published

    Diversity and population overlap between avian and human Escherichia coli belonging to sequence type 95

    Jørgensen, S. L., Stegger, M., Kudirkiene, E., Lilje, B., Poulsen, Louise Ladefoged, Ronco, T., Dos Santos, T. P., Kiil, K., Bisgaard, M., Pedersen, K., Nolan, L. K., Price, L. B., Olsen, Rikke Heidemann, Andersen, P. S. & Christensen, Henrik, 2019, In: mSphere. 4, 1, 12 p., e00333-18.

    Research output: Contribution to journalJournal articlepeer-review

  36. Published

    Draft genome sequences of three human pathogenic acinetobacter baumannii strains

    Madhi, M., Ronco, T., Hasani, A. & Olsen, Rikke Heidemann, 2019, In: Microbiology Resource Announcements. 8, 14, 2 p., e01742-18.

    Research output: Contribution to journalJournal articlepeer-review

  37. Published

    In vitro synergy of sertraline and tetracycline cannot be reproduced in pigs orally challenged with a tetracycline resistant Escherichia coli

    Kromann, Sofie, Hvidtfeldt, A., Boye, M., Sørensen, Dorte Bratbo, Jørgensen, S., Nielsen, Jens Peter & Olsen, Rikke Heidemann, 2019, In: BMC Microbiology. 19, 1, 12 p., 12.

    Research output: Contribution to journalJournal articlepeer-review

  38. 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 journalJournal articlepeer-review

  39. Published

    Reclassification of Bisgaard taxon 37 and taxon 44 as Psittacicella melopsittaci gen. nov., sp. nov., Psittacicella hinzii sp. nov. and Psittacicella gerlachiana sp. nov. within Psittacicellaceae fam. nov. of the order Pasteurellales

    Xin, D., Bisgaard, M., Busse, H. J., Olsen, Rikke Heidemann, Hess, C., Aalbæk, Bent, Olsen, John Elmerdahl & Christensen, Henrik, 2019, In: International Journal of Systematic and Evolutionary Microbiology. 69, 2, p. 350-355 6 p., 003133.

    Research output: Contribution to journalJournal articlepeer-review

  40. 2018
  41. 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 journalJournal articlepeer-review

  42. 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 journalJournal articlepeer-review

  43. 2017
  44. 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 journalJournal articlepeer-review

  45. 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 journalJournal articlepeer-review

  46. 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 journalJournal articlepeer-review

  47. 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 journalJournal articlepeer-review

  48. Published
  49. 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 journalJournal articlepeer-review

  50. 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 journalJournal articlepeer-review

  51. 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 journalJournal articlepeer-review

  52. 2016
  53. 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 journalLetterpeer-review

  54. 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 proceedingConference abstract in proceedingsResearchpeer-review

  55. 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 proceedingConference abstract in proceedingsResearchpeer-review

  56. 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 proceedingArticle in proceedingsResearchpeer-review

  57. 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 journalJournal articlepeer-review

  58. 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 journalJournal articlepeer-review

  59. 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 journalJournal articlepeer-review

  60. 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 journalJournal article

  61. 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 journalJournal articlepeer-review

  62. 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 journalJournal articlepeer-review

  63. 2015
  64. 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 journalJournal articlepeer-review

  65. 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 proceedingConference abstract in proceedingsResearchpeer-review

  66. Published
  67. 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 journalJournal articlepeer-review

  68. 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 journalJournal articlepeer-review

  69. 2014
  70. 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 journalReviewpeer-review

  71. 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 journalJournal articlepeer-review

  72. 2013
  73. 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 journalJournal articlepeer-review

  74. 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 journalJournal article

  75. 2012
  76. 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 journalJournal articlepeer-review

  77. 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 journalJournal articlepeer-review

  78. 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 journalJournal articlepeer-review

  79. 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/ReportPh.D. thesis

  80. 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 journalJournal articlepeer-review

  81. 2011
  82. 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 proceedingArticle in proceedingsResearch

  83. 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 journalJournal articlepeer-review

  84. 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 journalJournal article

  85. 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 proceedingArticle in proceedingsResearch

  86. 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 journalJournal articlepeer-review

  87. 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 journalJournal articlepeer-review

  88. 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 proceedingArticle in proceedingsResearch

  89. 2010
  90. 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 journalJournal articlepeer-review

  91. 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 journalJournal articlepeer-review

  92. 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 proceedingArticle in proceedingsResearch

  93. 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 journalJournal articlepeer-review

  94. 2009
  95. 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 journalJournal articlepeer-review

  96. Published
  97. 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 conferenceConference abstract for conferenceResearch

  98. 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 proceedingArticle in proceedingsResearchpeer-review

  99. 2008
  100. 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 conferenceConference abstract for conferenceResearch

ID: 6576950