Henrik Christensen

Henrik Christensen

Associate Professor

Member of:

    ORCID: 0000-0003-4238-4658

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    1. Published

      Diversity of the tetracycline resistance gene tet(M) and identification of Tn916- and Tn5801-like (Tn6014) transposons in Staphylococcus aureus from humans and animals

      de Vries, Lisbeth Elvira, Christensen, Henrik, Skov, R. L., Aarestrup, F. M. & Agersø, Y., 2009, In: Journal of Antimicrobial Chemotherapy. 64, 3, p. 490-500 11 p.

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

    2. Published

      The diversity of inducible and constitutively expressed erm(C) genes and association to different replicon types in staphylococci plasmids

      de Vries, Lisbeth Elvira, Christensen, Henrik & Agersø, Y., 2012, In: Mobile Genetic Elements. 2, 2, p. 72-80 9 p.

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

    3. Published

      The gut as reservoir of antibiotic resistance: microbial diversity of tetracycline resistance in mother and infant

      de Vries, Lisbeth Elvira, Vallès, Y., Agersø, Y., Vaishampayan, P. A., Garcia-Montaner, A., Kuehl, J. V., Christensen, Henrik, Barlow, M. & Francino, M. P., 2011, In: P L o S One. 6, 6, 11 p.

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

    4. Published

      Draft genome sequence of Streptococcus equi subsp. zooepidemicus strain S31A1, isolated from equine infectious endometritis

      da Piedade, I., Skive, Bolette, Christensen, Henrik & Bojesen, Anders Miki, 2013, In: Genome Announcements. 1, 5, 2 p., e00683-13.

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

    5. Published

      On the origin and diversity of Newcastle disease virus in Tanzania

      Yongolo, M. G., Christensen, Henrik, Handberg, K., Minga, U. & Olsen, John Elmerdahl, 2011, In: Onderstepoort Journal of Veterinary Research. 78, 1, 8 p.

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

    6. 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 journal › Journal article › Research › peer-review

    7. Published

      Differentiation of Shewanella putrefaciens and Shewanella alga on the basis of whole-cell protein profiles, rybotyping, phenotypic characterization, and 16S rRNA gene sequence analysis

      Vogel, B. F., Jørgensen, K., Christensen, Henrik, Olsen, John Elmerdahl & Gram, L., 1997, In: Applied and Environmental Microbiology. 63, 6, p. 2189-2199 11 p.

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

    8. Published

      Polyphasic taxonomic approach in the description of Alishewanella fetalis gen. nov., sp. nov., isolated from a human foetus

      Vogel, B. F., Venkateswaran, K., Christensen, Henrik, Falsen, E., Christiansen, G. & Gram, L., 2000, In: International Journal of Systematic and Evolutionary Microbiology. 50, p. 1133-1142 10 p.

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

    9. Published

      Identification and antimicrobial resistance of bacteria isolated from probiotic products used in shrimp culture

      Uddin, G. M. N., Larsen, M. H., Christensen, Henrik, Aarestrup, F. M., Phu, T. M. & Dalsgaard, Anders, 16 Jul 2015, In: PloS one. 10, 7, 21 p., e0132338.

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

    10. Published

      Glaesserella Australis sp. nov., isolated from the lungs of pigs

      Turni, C., Wu, Y., Omaleki, L., Giang, N., Blackall, P. J. & Christensen, Henrik, 2020, In: International Journal of Systematic and Evolutionary Microbiology. 70, 6, p. 3686-3692 7 p., 004221.

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

    11. Published

      Characterization of sulphonamide-resistant Escherichia coli using comparison of sul2 gene sequences and multilocus sequence typing

      Trobos Porro, M., Christensen, Henrik, Sunde, M., Nordentoft, S., Agersø, Y., Simonsen, G. S., Hammerum, A. M. & Olsen, John Elmerdahl, 2009, In: Microbiology. 155, p. 831-836 6 p.

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

    12. Published

      Source tracking of sulphonamide resistance in Escherichia coli using comparison of sul2 gene sequences and MLST typing

      Trobos, M., Hammerum, A. M., Sunde, M., Nordentoft, S., Agersø, Y., Simonsen, G. S., Christensen, Henrik & Olsen, John Elmerdahl, 2009.

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

    13. Published

      Transmission dynamics of Mannheimia haemolytica in newly-received beef bulls at fattening operations

      Timsit, E., Christensen, Henrik, Bareille, N., Seegers, H., Bisgaard, M. & Assié, S., 2013, In: Veterinary Microbiology. 161, 3-4, p. 295-304 10 p.

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

    14. 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 journal › Journal article › Research › peer-review

    15. 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

    16. 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

    17. 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

    18. 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

    19. 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

    20. Published

      Polyamines are essential for virulence in Salmonella enterica serovar Gallinarum despite evolutionary decay of polyamine biosynthesis genes

      Schroll, C., Christensen, Jens Peter, Christensen, Henrik, Pors, S. E., Thorndahl, L., Jensen, P. R., Olsen, John Elmerdahl & Jelsbak, L., 2014, In: ScienceDirect, Veterinary Microbiology. 170, 1-2, p. 144-150 7 p.

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

    21. Published

      Studies on the prevalence of Riemerella anatipestifer in the upper respiratory tract of clinically healthy ducklings and characterization of untypable strains

      Ryll, M., Christensen, Henrik, Bisgaard, M., Christensen, Jens Peter, Hinz, K. & Köhler, B., 2001, In: Zoonoses and Public Health. 48, p. 537-546 10 p.

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

    22. Published

      Description of Riemerella columbipharyngis sp. nov., isolated from the pharynx of healthy domestic pigeons (Columba livia f. domestica), and emended descriptions of the genus Riemerella, Riemerella anatipestifer and Riemerella columbina

      Rubbenstroth, D., Ryll, M., Hotzel, H., Christensen, Henrik, Knobloch, J. K., Rautenschlein, S. & Bisgaard, M., 2013, In: International Journal of Systematic and Evolutionary Microbiology. 63, 1, p. 280-287 8 p.

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

    23. Published

      Atypical actinobacillosis affecting hind limbs and lungs in a single beef cattle herd

      Relun, A., Cesbron, N., Bourdeau, P., Dorso, L., Brement, T., Assié, S., Christensen, Henrik & Guatteo, R., 2019, In: Journal of Veterinary Internal Medicine. 33, 1, p. 297-301 5 p.

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

    24. Detection of Yersinia enterocolitica O:3 in faecal samples and tonsil swabs from pigs using IMS and PCR

      Rasmussen, H. N., Rasmussen, O. F., Christensen, Henrik & Olsen, John Elmerdahl, 1995, In: Journal of Applied Bacteriology. 78, 5, p. 563-8

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

    25. Published

      Involvement of bacterial quorum-sensing signals in spoilage of bean sprouts

      Rasch, M., Andersen, Jens Bo, Nielsen, K. F., Flodgaard, L. R., Christensen, Henrik, Givskov, Michael & Gram, L., 2005, In: Applied and Environmental Microbiology. 71, 6, p. 3321-30 9 p.

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

    26. Published

      Molecular mechanisms of E. coli causing outbreaks of cellulitis in broilers

      Poulsen, Louise Ladefoged, Jørgensen, S. L., Bisgaard, M. & Christensen, Henrik, 2016. 1 p.

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

    27. 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

    28. 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

    29. Published

      Characterization of Escherichia coli causing cellulitis in broilers

      Poulsen, Louise Ladefoged, Bisgaard, M., Jørgensen, S. L., Dideriksen, T., Pedersen, J. R. & Christensen, Henrik, 2018, In: Veterinary Microbiology. 225, p. 72-78 7 p.

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

    30. Published

      Whole genome sequence comparison of avian pathogenic Escherichia coli from acute and chronic salpingitis of egg laying hens

      Poulsen, Louise Ladefoged, Kudirkiene, E., Jørgensen, S. L., Djordjevic, S. P., Cummins, M. L., Christensen, Jens Peter, Christensen, Henrik, Bisgaard, M. & Thoefner, Ida , 2020, In: BMC Veterinary Research. 16, 1, 9 p., 148.

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

    31. Published

      Prevalence of Potential Pathogenic and Antimicrobial Resistant Escherichia coli in Danish Broilers

      Poulsen, Louise Ladefoged, Bisgaard, M. & Christensen, Henrik, 2023, In: Antibiotics. 12, 2, 344.

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

    32. Published

      Occurrence of haemolytic Mannheimia spp. in apparently healthy sheep in Norway

      Poulsen, L. L., Reinert, T. M., Sand, R. L., Bisgaard, M., Christensen, Henrik, Olsen, John Elmerdahl, Stuen, S. & Bojesen, Anders Miki, 2006, In: Acta Veterinaria Scandinavica (Print Edition). 48, 19, 7 p.

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

    33. Published

      Genetic diversity and associated pathology of Pasteurella multocida isolated from porcine pneumonia

      Pors, S. E., Hansen, Mette Sif, Christensen, Henrik, Jensen, Henrik Elvang, Petersen, A. H. H. & Bisgaard, M., 2011, In: Veterinary Microbiology. 150, 3-4, p. 354-361 8 p.

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

    34. Published

      Comparison of Sul2 resistant gene from Escherichia coli isolated from animals and humans

      Porro, M. T., Hammerum, A. M., Sunde, M., Pedersen, K., Agersø, Y., Christensen, Henrik & Olsen, John Elmerdahl, 2007, Ikke angivet. ASM, 1 p.

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

    35. Published

      Diversity and stability of the genetic population structure of Escherichia coli isolated from broiler production

      Pires dos Santos, T. M. S., Kyvsgaard, N. C., Bisgaard, M. & Christensen, Henrik, 2011, 17th World Veterinary Poultry Congress: proceedings. WVPA, p. 770-771 2 p.

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

    36. Published

      Genetic diversity and virulence profiles of Escherichia coli causing salpingitis and peritonitis in broiler breeders

      Pires dos Santos, T. M. S., Bisgaard, M. & Christensen, Henrik, 2013, In: Veterinary Microbiology. 162, 2-4, p. 873-880 8 p.

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

    37. Published

      Chronic salpingitis and peritonitis in chickens due to Escherichia coli infection - a possible model for extraintestinal infections in humans

      Pires dos Santos, T. M. S., Kyvsgaard, N. C., Bisgaard, M. & Christensen, Henrik, 2011, 17th World Veterinary Poultry Congress: proceedings. WVPA, p. 772-774 3 p.

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

    38. Published

      Detection of Enterococcus feacalis in chicken tissue sections by fluorescent 16S rRNA in situ hybridization

      Pires dos Santos, T. M. S., Pors, S. E., Nielsen, O. L., Christensen, Henrik, Petersen, A., Larsen, J. & Bisgaard, M., 2009. 1 p.

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

    39. Published

      Occurrence of weak mutators among avian pathogenic Escherichia coli (APEC) isolates causing salpingitis and peritonitis in broiler breeders

      Pires dos Santos, T. M. S., Bisgaard, M., Kyvsgaard, N. C. & Christensen, Henrik, 2014, In: Veterinary Microbiology. 168, 1, p. 141-147 7 p.

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

    40. Published

      Genetic diversity of Pasteurella multocida fowl cholera isolates as demonstrated by ribotyping and 16S rRNA and partial atpD sequence comparisons

      Petersen, K. D., Christensen, Henrik, Bisgaard, M. & Olsen, John Elmerdahl, 2001, In: Microbiology. 147, p. 2739-2748 10 p.

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

    41. Published

      Investigations on the genetic relationship between subspecies of Pasteurella multocida as demonstrated by ribotyping and 16S rRNA sequencing

      Petersen, K. D., Christensen, Henrik, Christensen, Jens Peter & Bisgaard, M., 1999. 2 p.

      Research output: Contribution to conference › Paper › Research

    42. Published

      Characterization of small-colony variants of Enterococcus faecalis isolated from chickens with amyloid arthropathy

      Petersen, A. H. H., Chadfield, M. S., Christensen, Jens Peter, Christensen, Henrik & Bisgaard, M., 2008, In: Journal of Clinical Microbiology. 46, 8, p. 2686-2691 6 p.

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

    43. Published

      Mutations in gyrA and parC in Pasteurella multocida with decreased sensitivity to enrofloxacin

      Petersen, A. H. H., Christensen, Henrik & Bisgaard, M., 2008. 1 p.

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

    44. Published

      Development of a MLST typing scheme for Mannheimia haemolytica

      Petersen, A. H. H., Bisgaard, M. & Christensen, Henrik, 2008. 1 p.

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

    45. Published

      Detection of Enterococcus faecalis  ST82 associated with amyloid arthropathy by real-time PCR.

      Petersen, A. H. H., Bisgaard, M. & Christensen, Henrik, 2009. 1 p.

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

    46. Published

      Clonality of Enterococcus faecalis associated with amyloid arthropathy in chickens evaluated by multilocus sequence typing (MLST)

      Petersen, A. H. H., Christensen, Henrik, Philipp, H. & Bisgaard, M., 2009, In: Veterinary Microbiology. 134, 3-4, p. 392-395 4 p.

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

    47. Published

      Real-time PCR detection of Enterococcus faecalis  associated with amyloid arthropathy

      Petersen, A. H. H., Bisgaard, M. & Christensen, Henrik, 2010, In: Journal of Applied Microbiology. 51, 1, p. 61-64 4 p.

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

    48. Published

      Detection of a well defined clonal lineage of Pasteurella moltocida associated with fowl cholera by real-time PRR

      Petersen, A., Bisgaard, M., Larsen, J. & Christensen, Henrik, 2009. 1 p.

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

    49. Published

      Development of a multilocus sequence typing (MLST) scheme for Mannheimia haemolytica and assessment of the population structure of isolates obtained from cattle and sheep

      Petersen, A., Christensen, Henrik, Kodjo, A., Weiser, G. C. & Bisgaard, M., 2009, In: Infection, Genetics and Evolution. 9, 4, p. 626-632 7 p.

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

    50. Published

      MLST typing of Pasteurella multocida associated with haemorrhagic septicaemia and development of a real-time PCR specific for haemorrhagic septicaemia associated isolates

      Petersen, A., Bisgaard, M., Townsend, K. & Christensen, Henrik, 2014, In: Veterinary Microbiology. 170, 3-4, p. 335-341 7 p.

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

    51. Published

      Investigations on the existence of a global clone of Enterococcus faecalis associated with amyloid arthropathy in chickens

      Petersen, A., Christensen, Henrik & Bisgaard, M., 2007, . p. 254 1 p.

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

    52. Published

      Sensory, chemical and bacteriological changes during storage of iced squid (Todaropsis eblanae)

      Paarup, T., Sanchez, J. A., Moral, A., Christensen, Henrik, Bisgaard, M. & Gram, L., 2002, In: Journal of Applied Microbiology. 92, 5, p. 941-950 10 p.

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

    53. Published

      Aflatoxicosis, infectious bursal disease and immune response to Newcastle disease vaccination in rural chickens

      Otim, M. O., Mukiibi-Muka, G., Christensen, Henrik & Bisgaard, M., 2005, In: Avian Pathology. 34, 4, p. 319-323 5 p.

      Research output: Contribution to journal › Journal article › Research

    54. Published

      A study of risk factors associated with Newcastle disease epidemics in village free-range chickens in Uganda

      Otim, M. O., Kabagambe, E. K., Mukiibi, G. M., Christensen, Henrik & Bisgaard, M., 2007, In: Tropical Animal Health and Production. 39, 1, p. 27-35 9 p.

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

    55. Published

      Molecular characterization and phylogenetic study of Newcastle disease virus isolates from recent outbreaks in eastern Uganda

      Otim, M. O., Christensen, Henrik, Jørgensen, P. H., Handberg, K. J. & Bisgaard, M., 2004, In: Journal of Clinical Microbiology. 42, 6, p. 2802-2805 4 p.

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

    56. 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

    57. 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

    58. 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

    59. 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

    60. 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

    61. 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

    62. 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

    63. 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

    64. 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

    65. 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

    66. 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

    67. 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

    68. 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

    69. 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

    70. 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

    71. Published

      Fluoroscence in situ hybridization of chicken intestinal samples with bacterial rRNA targeted oligonucleotide probes

      Olsen, K. N., Francesch, M. & Christensen, Henrik, 2006, Ikke angivet. Romboli, I., Flock, D. & Franchini, A. (eds.). World's Poultry Science Association, 6 p. (World's Poultry Science Journal; No. Suppl.).

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

    72. Published

      Investigation of chicken intestinal bacterial communities by 16S rRNA targeted fluorescence in situ hybridization

      Olsen, K. N., Henriksen, M. M. M., Bisgaard, M., Nielsen, O. L. & Christensen, Henrik, 2008, In: Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology. 94, 3, p. 423-437 15 p.

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

    73. Published

      The current state of Pasteurellaceae systematics

      Olsen, John Elmerdahl, Bisgaard, M., Kubnert, P. & Christensen, Henrik, 2005, Pasteurellaceae 2005. American Society of Microbiology, p. 14 1 p.

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

    74. Published

      Diversity and evolution of blaZ from Staphylococcus aureus and coagulase-negative staphylococci

      Olsen, John Elmerdahl, Christensen, Henrik & Aarestrup, F. M., 2006, In: Journal of Antimicrobial Chemotherapy. 57, 3, p. 450-460 11 p.

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

    75. Published

      A ¤typing concept for Salmonella

      Olsen, John Elmerdahl, Lau Baggesen, D., Christensen, Henrik & Platt, D. J., 1997. 1 p.

      Research output: Contribution to conference › Paper › Research

    76. Published

      A ¤typing concept for Salmonella

      Olsen, John Elmerdahl, Lau Baggesen, D., Christensen, Henrik & Platt, D. J., 1998, EUR. Aspán, A. & Mulder, R. W. A. W. (eds.). 18209 ed. Publications Office, p. 97-103 7 p.

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

    77. Published

      Delineation of the genus Actiobacillus by comparison of partial infB sequences

      Nørskov-Lauritsen, N., Christensen, Henrik, Okkels, H., Killian, M. & Brun, B., 2004, In: International Journal of Systematic and Evolutionary Microbiology. 54, p. 635-644 10 p.

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

    78. Published

      Evaluation of a fluorescence-labelled oligonucleotide probe targeting 23S rRNA for in situ detection of Salmonella serovars in paraffin-embedded tissue sections and their rapid identification in bacterial smears

      Nordentoft, S., Christensen, Henrik & Wegener, H. C., 1997, In: Journal of Clinical Microbiology. 35, 10, p. 2642-2648 7 p.

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

    79. Published

      Genetic analysis of Trichuris suis and Trichuris trichiura recovered from humans and pigs in a sympatric setting in Uganda

      Nissen, S., Al-Jubury, Azmi, Hansen, Tina Vicky Alstrup, Olsen, A., Christensen, Henrik, Thamsborg, Stig Milan & Nejsum, P., 2012, In: Veterinary Parasitology. 188, 1-2, p. 68-77 10 p.

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

    80. Published

      Genetic variation in whipworm (trichuris spp.) populations

      Nissen, S., Nejsum, P., Christensen, Henrik, Olsen, A. & Thamsborg, Stig Milan, 2009. 1 p.

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

    81. Published

      Genetic variation of Trichuris spp. obtained from humans and pigs

      Nissen, S., Al-Jubury, A., Olsen, A., Christensen, Henrik, Thamsborg, Stig Milan & Nejsum, P., 2010, Congress handbook: the XIIth international congress of parasitology: Australia, 2010. Australian Society for Parasitology, 1 p.

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

    82. Published

      Morphological and Genetic Diversity of Trichuris spp. recovered from Humans and Pigs

      Nissen, S., Nejsum, P., Christensen, Henrik, Olsen, A. & Thamsborg, Stig Milan, 2009,  One World, one Health - Parasites in a changing landscape. p. 109-110 1 p.

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

    83. Published

      Morphological and molecular characterization of Trichuris spp. obtained from humans and pigs

      Nissen, S., Nejsum, P., Christensen, Henrik, Olsen, A. & Thamsborg, Stig Milan, 2009.

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

    84. Published

      Reclassification of Actinobacillus muris as Muribacter muris gen. nov., comb. nov.

      Nicklas, W., Bisgaard, M., Aalbæk, Bent, Kuhnert, P. & Christensen, Henrik, 2015, In: International Journal of Systematic and Evolutionary Microbiology. 65, 10, p. 3344-3351 8 p.

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

    85. Published

      Genus I. Pasteurella

      Mutters, R., Christensen, Henrik & Bisgaard, M., 2005, Bergey's manual of systemativ bacteriology. Brenner, D. J., Krieg, N. R. & Staley, J. T. (eds.). Kluwer Academic Publishers, Vol. 2, part B. p. 857-866 10 p.

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

    86. Published

      Transmission of Enterococcus faecalis among layer chickens during hatch

      Munch, M., Olsen, R., Bisgaard, M. & Christensen, Henrik, 2011, 17th World Veterinary Poultry Congress: proceedings. WVPA, p. 349-353 5 p.

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

    87. Published

      Characterization of Vibrio strains isolated from turbot (Scophthalmus maximus) culture by phenotypic analysis, ribotyping and 16S rRNA gene sequence comparison

      Montes, M., Farto, O., Pérez, M. J., Nieto, T. P., Larsen, J. L. & Christensen, Henrik, 2003, In: Journal of Applied Microbiology. 95, 4, p. 2003, 11 p.

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

    88. Published

      Outbreaks of pleuritis and peritonitis in calves associated with Pasteurella multocida capsular type B strain

      McFadden, A. M. J., Christensen, Henrik, Fairley, R. A., Hill, F. I. & Spence, R. P., 2011, In: New Zealand Veterinary Journal. 59, 1, p. 40-45 6 p.

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

    89. Published

      Specific detection of Pasteurella multocida in chickens with fowl cholera and in pig lung tissues using fluorescent rRNA in situ hybridization

      Mbuthia, P. G., Christensen, Henrik, Boye, M., Dumong Petersen, K. M., Bisgaard, M., Nyaga, P. N. & Olsen, John Elmerdahl, 2001, In: Journal of Clinical Microbiology. 39, 7, p. 2627-2633 7 p.

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

    90. Published

      Distribution of RTX toxin genes in strains of [Actinobacillus] rossii and [Pasteurella] mairii

      Mayor, D., Korczak, B. M., Christensen, Henrik, Bisgaard, M., Frey, J. & Kuhnert, P., 2006, In: Veterinary Microbiology. 116, 1-3, p. 194-201 8 p.

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

    91. Published

      Characterization of Pasteurella multocida involved in rabbit infections

      Massacci, F. R., Magistrali, C. F., Cucco, L., Curcio, L., Bano, L., Mangili, P. M., Scoccia, E., Bisgaard, M., Aalbæk, Bent & Christensen, Henrik, 2018, In: Veterinary Microbiology. 213, p. 66-72 7 p.

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

    92. Published

      Presence and diversity of ß-lactamase gene in cat and dog staphylococci

      Malik, S., Christensen, Henrik, Peng, H. & Barton, M. D., 2007, In: Veterinary Microbiology. 123, 1-3, p. 162-168 7 p.

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

    93. Published

      Repetitive element sequence-based pcr typing for improved discrimination of Campylobacter Jejuni

      Malakauskas, M., Malakauskas, A., Christensen, Henrik, Olsen, John Elmerdahl & Brogren, C. H., 2017, In: Veterinarija ir Zootechnika. 75, 97, p. 43-53 11 p.

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

    94. Published

      Improved discrimination of Campylobacter jejuni using repetitive element sequence-based PCR typing and comparison with PFGE typing

      Malakauskas, M., Christensen, Henrik, Olsen, John Elmerdahl & Brogren, C., 2008, The 21st International ICFMH Symposium "Evolving Microbial Food Quality and Safety" - Programme and Abstract Book. IUMS/ICFMH, p. 347 1 p.

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

    95. Published

      Association between phylogeny, virulence potential and serovars of Salmonella enterica

      Litrup, E., Torpdahl, M., Malorny, B., Huehn, S., Christensen, Henrik & Nielsen, E., 2010, In: Infection, Genetics and Evolution. 10, 7, p. 1132-1139 8 p.

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

    96. Published

      DNA microarray analysis of Salmonella serotype Typhimurium strains causing different symptoms of disease

      Litrup, E., Torpdahl, M., Malorny, B., Huehn, S., Helms, M., Christensen, Henrik & Nielsen, E. M., 2010, In: BMC Microbiology. 10, 96, 8 p.

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

    97. Published

      Use of multiple-locus variable-number tandem-repeats analysis (MLVA) typing to characterize Salmonella Typhimurium DT41 broiler breeder infections

      Litrup, E., Christensen, Henrik, Nordentoft, S., Nielsen, E., Davies, R., Helmuth, R. & Bisgaard, M., 2010, In: Journal of Applied Microbiology. 109, 6, p. 2032-2038 7 p.

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

    98. Published

      Development of a duplex qPCR for the differentiation of a live attenuated Escherichia coli aroA mutant vaccine strain from field isolates in chickens

      Leurs, K., Goossens, E., Christensen, Henrik, Mainil, J. G., Vancraeynest, D., Ducatelle, R. & Van Immerseel, F., 2022, In: PLoS ONE. 17, 13 p., e0278949.

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

    99. Published

      Identification of lactic acid bacteria from chili bo, a Malaysian food ingredient

      Leisner, Jørgen, Pot, B., Christensen, Henrik, Rusul, G., Olsen, John Elmerdahl, Wee, B. W., Muhamad, K. & Ghazali, M., 1999, In: Applied and Environmental Microbiology. 65, 2, p. 599-605 7 p.

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

    100. Published

      Diversity of lactic acid bacteria isolated from traditional Malaysian foods

      Leisner, Jørgen, Christensen, Henrik, Olsen, John Elmerdahl, Pot, B., Rusul, G., Wee, B. W., Muhamad, K. & Ghazali, H. M., 1998. 1 p.

      Research output: Contribution to conference › Paper › Research

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