John Elmerdahl Olsen

John Elmerdahl Olsen

Professor

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    ORCID: 0000-0001-6225-6587

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    1. Published

      16S to 23S rRNA spacer fragment length polymorphism of Salmonella enterica at subspecies and serotype levels

      Christensen, Henrik, Lange Møller, P., Vogensen, Finn Kvist & Olsen, John Elmerdahl, 2000, In: Journal of Applied Microbiology. 89, p. 130-136 7 p.

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

    2. Published

      In vitro transfer of sulphonamide and gentamicin resistance from E. coli of animal origin to E. coli of human origin

      Porro, M. T., Olsen, John Elmerdahl, Jakobsen, L. & Hammerum, A. M., 2006. 1 p.

      Research output: Contribution to conference › Poster › Research

    3. Published

      Salmonella isolates with different behavior in adhesion to surfaces studied by DNA micro array assisted analysis

      Holmstrøm, K., Olsen, K. N., Meldgaard, H., Bagge-Ravn, D., Frees, Dorte, Lauritsen, D., Gram, L. & Olsen, John Elmerdahl, 2005. 1 p.

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

    4. Published

      Salmonella source attribution based on microbial subtyping

      Barco, L., Barrucci, F., Olsen, John Elmerdahl & Ricci, A., 2013, In: International Journal of Food Microbiology. 163, 2-3, p. 193-203 11 p.

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

    5. Published

      A Virus-like Particle-Based F4 Enterotoxigenic Escherichia coli Vaccine Is Inhibited by Maternally Derived Antibodies in Piglets but Generates Robust Responses in Sows

      Aves, Kara-Lee, Guerra, Priscila Regina, Fresno, A. H., Saraiva, M. M. S., Cox, E., Bækbo, P. J., Nielsen, Morten Agertoug, Sander, Adam F. & Olsen, John Elmerdahl, 2023, In: Pathogens. 12, 12, 19 p., 1388.

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

    6. Published

      A bioinformatic approach to identify core genome difference between Salmonella Pullorum and Salmonella Enteritidis

      Fei, Xiao, Li, Q., Olsen, John Elmerdahl & Jiao, X., 2020, In: Infection, Genetics and Evolution. 85, 104446.

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

    7. Published

      A hitherto not recognized phenotype of spvA in Salmonella

      Frees, Dorte, Gram, L., Holmstrøm, K. & Olsen, John Elmerdahl, 2010, Proceedings: 13S international symposium salmonella and salmonellosis. p. 33-34 2 p.

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

    8. Published

      A manual of basic tools in bioinformatics

      Christensen, Henrik & Olsen, John Elmerdahl, 2003, 35 p.

      Research output: Book/Report › Compendium/lecture notes › Education

    9. Published

      A manual of basic tools in bioinformatics

      Christensen, Henrik & Olsen, John Elmerdahl, 2003. 34 p.

      Research output: Contribution to conference › Paper › Research

    10. Published

      A new real-time PCR method for the identification of Salmonella Dublin

      Persson, S., Jacobsen, T., Olsen, John Elmerdahl, Olsen, K. E. P. & Hansen, F., 2012, In: Journal of Applied Microbiology. 113, 3, p. 615-621 7 p.

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

    11. Published

      A plasmid-encoded fetmp-fls iron uptake system confers selective advantages to salmonella enterica serovar typhimurium in growth under iron-restricted conditions and for infection of mammalian host cells

      García, V., Herrero-Fresno, A., Rodicio, R., Felipe-López, A., Montero, I., Olsen, John Elmerdahl, Hensel, M. & Rodicio, M. R., 2020, In: Microorganisms. 8, 5, 15 p., 630.

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

    12. Published

      A randomised clinical trial on the efficacy of oxytetracycline dose through water medication of nursery pigs on diarrhoea, faecal shedding of Lawsonia intracellularis and average daily weight gain

      Larsen, Inge, Hjulsager, C. K., Holm, A., Olsen, John Elmerdahl, Nielsen, Søren Saxmose & Nielsen, Jens Peter, 1 Jan 2016, In: Preventive Veterinary Medicine. 123, p. 52-59 8 p.

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

    13. Published

      A rapid polymerase chain reaction (PCR)-based assay for the identification of Listeria monocytogenes in food samples

      Rossen, L., Holmstrøm, K. & Olsen, John Elmerdahl, Nov 1991, In: International Journal of Food Microbiology. 14, 2, p. 145-151 7 p.

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

    14. Published

      A study on effectiveness of seven disinfectants against possible bacteria contaminants of coops and premises inhabited by indigenous chickens and ducks

      Njagi, L. W., Mbuthia, P. G., Bebora, L. C., Nyaga, P. N., Minga, U. & Olsen, John Elmerdahl, 2005, In: Kenya Veterinarian. 29, p. 113-118 4 p.

      Research output: Contribution to journal › Journal article › Research

    15. Published

      A third mode of surface-associated growth: immobilization of Salmonella enterica serovar Typhimurium modulates the RpoS-directed transcriptional programme

      Knudsen, G. M., Nielsen, M., Grassby, T., Danino-Appleton, V., Thomsen, Line Elnif, Colquhoun, I. J., Brocklehurst, T. F., Olsen, John Elmerdahl & Hinton, J. C. D., 2012, In: Environmental Microbiology. 14, 8, p. 1855-1875 21 p.

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

    16. 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

    17. 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

    18. Published

      ANTIBACTERIAL EFFECTS OF SINGLE AND COMBINED CRUDE EXTRACTS OF SYNADENIUM GLAUCESCENS AND COMMIPHORA SWYNNERTONII

      Ochollah, G. M., Msengwa, S. Z., Mabiki, P. F., Kusiluka, J. M. L., Mdegela, H. R. & Olsen, John Elmerdahl, 2022, In: African Journal of Infectious Diseases. 16, 2, p. 9-16 8 p.

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

    19. Published

      Abstract i forbindelse med præsentation af poster til: Avancerede målesystemer og databehandling til proces- og produktudvikling, 1995, KVL

      Christensen, Henrik & Olsen, John Elmerdahl, 1995

      Research output: Other contribution › Communication

    20. Published

      Adaptation of Salmonella Typhimurium to triclosan

      Gantzhorn, M. R., Olsen, John Elmerdahl & Thomsen, Line Elnif, 2012.

      Research output: Contribution to conference › Poster › Research

    21. Published

      Adaptive responses to cefotaxime treatment in ESBL-producing Escherichia coli and the possible use of significantly regulated pathways as novel secondary targets

      Møller, T. S. B., Rau, M. H., Bonde, C. S., Sommer, M. O. A., Guardabassi, Luca & Olsen, John Elmerdahl, Sep 2016, In: Journal of Antimicrobial Chemotherapy. 71, 9, p. 2449-2459 11 p.

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

    22. Published

      An improved method for rapid isolation of plasmid DNA from wild‐type Gram‐negative bacteria for plasmid restriction profile analysis

      Olsen, John Elmerdahl, May 1990, In: Letters in Applied Microbiology. 10, 5, p. 209-212 4 p.

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

    23. Published

      An observational field study of porcine post-weaning diarrhea: clinical and microbiological findings, and fecal pH-measurements as a potential diagnostic tool

      Eriksen, E. Ø., Kudirkiene, E., Barington, Kristiane, Goecke, Nicole Bakkegård, Blirup-Plum, Sophie Amalie, Nielsen, Jens Peter, Olsen, John Elmerdahl, Jensen, Henrik Elvang, Pankoke, K., Larsen, Lars, Liu, G. & Pedersen, Ken Steen, 2023, In: Porcine Health Management. 9, 33.

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

    24. Published

      Analysis of gene order data supports vertical inheritance of the leukotoxin operon and genome rearrangements in the 5' flanking region in genus Mannheimia

      Larsen, J., Kuhnert, P., Frey, J., Christensen, Henrik, Bisgaard, M. & Olsen, John Elmerdahl, 2007, In: BMC Evolutionary Biology. 7, 184, 11 p.

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

    25. Published

      Analysis of the contribution of bacteriophage ST64B to in vitro virulence traits of Salmonella enterica serovar Typhimurium

      Herrero Fresno, A., Leekitcharoenphon, P., Hendriksen, R. S., Olsen, John Elmerdahl & Aarestrup, F. M., 2014, In: Journal of Medical Microbiology. 63, 3, p. 331-342 12 p.

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

    26. Published

      Antibiotic resistance: genetic mechanisms and mobility

      Olsen, John Elmerdahl, 1999, In: Acta Veterinaria Scandinavica (Print Edition). 92, p. 15-22 8 p.

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

    27. Published

      Antibiotic resistance in Acinetobacter spp. isolated from sewers receiving waste effluent from a hospital and a pharmaceutical plant

      Guardabassi, Luca, Petersen, A., Olsen, John Elmerdahl & Dalsgaard, Anders, 1998, In: Applied and Environmental Microbiology. 64, 9, p. 3499-3502 4 p.

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

    28. Published

      Antibiotic-Induced, Increased Conjugative Transfer Is Common to Diverse Naturally Occurring ESBL Plasmids in Escherichia coli

      Liu, G., Bogaj, K., Bortolaia, V., Olsen, John Elmerdahl & Thomsen, Line Elnif, 2019, In: Frontiers in Microbiology. 10, 2119.

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

    29. Published

      Antibiotikaresistens: er det gammel vin på nye flasker?

      Nielsen, B., Olsen, John Elmerdahl & Aarestrup, F. M., 1997, In: Veterinærinformation. 1, p. 3-10 8 p.

      Research output: Contribution to journal › Journal article › Communication

    30. Published

      Antibiotikaresistente bakterier i det akvatiske miljø

      Petersen, A., Olsen, John Elmerdahl & Dalsgaard, Anders, 1997, In: Dansk Veterinærtidsskrift. 80, 16, p. 700-704 5 p.

      Research output: Contribution to journal › Journal article › Research

    31. Published

      Antibiotikumresistente Escherichia coli i tarmfloraen hos danske svin og kalve i perioden 1970-1988

      Aalbæk, Bent, Olsen, John Elmerdahl, Nielsen, B., Larsen, J. L., Sørensen, M., Errebo Larsen, H. & Rasmussen, J., 1995, In: Dansk Veterinærtidsskrift. 78, 20, p. 1026-1029 4 p.

      Research output: Contribution to journal › Journal article › Research

    32. Published

      Antimicrobial resistance in faecal samples from buffalo, wildebeest and zebra grazing together with and without cattle in Tanzania

      Katakweba, A. A. S., Møller, K. S., Muumba, J., Muhairwa, A. P., Damborg, Peter Panduro, Rosenkrantz, J. T., Minga, U. M., Mtambo, M. M. A. & Olsen, John Elmerdahl, Apr 2015, In: Journal of Applied Microbiology. 118, 4, p. 966-975 10 p.

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

    33. Published

      Antimicrobial resistance mechanism: entering the post-antimicrobial era?

      Olsen, John Elmerdahl, Chriél, M., Aalbæk, Bent & Dietz, Hans Henrik, 1998. 5 p.

      Research output: Contribution to conference › Paper › Research

    34. Published

      Antimicrobial-induced horizontal transfer of antimicrobial resistance genes in bacteria: a mini-review

      Liu, G., Thomsen, Line Elnif & Olsen, John Elmerdahl, 2022, In: The Journal of antimicrobial chemotherapy. 77, 3, p. 556-567 12 p.

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

    35. Published

      Anvendelse af ITS (internal transcribed spacer) fragmentlængde polymorfi til typning indenfor Salmonella og Campylobacter

      Christensen, Henrik, Jørgensen, K., Lange Møller, P. & Olsen, John Elmerdahl, 1997, Ikke angivet. Levnedsmiddelcentret, p. 187 1 p.

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

    36. Published

      Anvendelse af antibiotika i landbruget: betydning for udvikling af antibiotikaresistente bakterier

      Olsen, John Elmerdahl & Aarestrup, F. M., 1999, In: Miljoesk. 16, p. 16-23 8 p.

      Research output: Contribution to journal › Journal article › Communication

    37. Published

      Application of the Random Forest method to analyse epidemiological and phenotypic characteristics of Salmonella 4,[5],12:i:- and Salmonella Typhimurium strains

      Barco, L., Mancin, M., Ruffa, M., Saccardin, C., Minorello, C., Zavagnin, P., Lettini, A. A., Olsen, John Elmerdahl & Ricci, A., 2012, In: Zoonoses and Public Health. 59, 7, p. 505-512 8 p.

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

    38. Published

      Apramycin treatment affects selection and spread of a multidrug-resistant Escherichia coli strain able to colonize the human gut in the intestinal microbiota of pigs

      Herrero Fresno, A., Zachariasen, C., Hansen, M. H., Nielsen, A. S., Hendriksen, R. S., Nielsen, Søren Saxmose & Olsen, John Elmerdahl, 2016, In: Veterinary Research. 47, 10 p., 12.

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

    39. Published

      Ascertaining the relationship between Salmonella Typhimurium and Salmonella 4,[5],12:i:- by MLVA and inferring the sources of human salmonellosis due to the two serovars in Italy

      Barco, L., Barrucci, F., Cortini, E., Ramon, E., Olsen, John Elmerdahl, Luzzi, I., Lettini, A. A. & Ricci, A., 27 Apr 2015, In: Frontiers in Microbiology. 6, 10 p., 301.

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

    40. Published

      Assessing phenotypic virulence of Salmonella enterica across serovars and sources

      Petrin, S., Wijnands, L., Benincà, E., Mughini-Gras, L., Delfgou-van Asch, E. H. M., Villa, L., Orsini, M., Losasso, C., Olsen, John Elmerdahl & Barco, L., 2023, In: Frontiers in Microbiology. 14, 1184387.

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

    41. Published

      Association between antimicrobial usage and resistance in Salmonella from poultry farms in Nigeria

      Jibril, A. H., Okeke, I. N., Dalsgaard, Anders & Olsen, John Elmerdahl, 2021, In: BMC Veterinary Research. 17, 234.

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

    42. Published

      Association between phage types and antimicrobial resistance bovine Staphylococcus aureus from 10 countries

      Vintov, J., Aarestrup, F. M., Zinn, C. E. & Olsen, John Elmerdahl, 2003, In: Veterinary Microbiology. 95, p. 133 14 p.

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

    43. Published

      Association of the prophage BTP1 and the prophage-encoded gene, bstA, with antivirulence of Salmonella Typhimurium ST313

      Spiegelhauer, M. R., García, V., Guerra, Priscila Regina, Olsen, John Elmerdahl & Herrero-Fresno, A., 2020, In: Pathogens and Disease. 78, 3, ftaa019.

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

    44. Published

      Awareness of human health risks associated with the use of antibiotics among livestock keepers and factors that contribute to selection of antibiotic resistance bacteria within livestock in Tanzania

      Katakweba, A. A. S., Mtambo, M. M. A., Olsen, John Elmerdahl & Muhairwa, A. P., Oct 2012, In: Livestock Research for Rural Development. 24, 10

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

    45. Published

      Awareness of human health risks associated with the use of antibiotics among livestock keepers and factors that contribute to selection of antibiotic resistant bacteria within livestock in Tanzania

      Katakweba, A. A. S., Mtambo, M. M. A., Olsen, John Elmerdahl & Muhairwa, A. P., 2012, In: Livestock Research for Rural Development (Online Edition). 24, 10, 10 p., 170.

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

    46. Published

      Bacterial decimation times in anaerobic digestions of animal slurries

      Olsen, John Elmerdahl, 1987, In: Biological Wastes. 21, 3, p. 153-168 16 p.

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

    47. Published

      Bacterial resistance to antimicrocials in a practical perspective

      Olsen, John Elmerdahl & Mrenoski, S., 2003. 7 p.

      Research output: Contribution to conference › Paper › Research

    48. Published

      Bacterial typing methods suitable for epidemiological analysis. Applications in investigations of salmonellosis among livestock.

      Olsen, John Elmerdahl, Brown, D. J., Skov, M. N. & Christensen, Jens Peter, Dec 1993, In: The Veterinary quarterly. 15, 4, p. 125-135 11 p.

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

    49. Published

      Bacteriostatic and Haemolytic Activities of Extracts and Compounds of Commiphora swynnertonii

      Msengwa, Z., Credo, D., Mafuru, M., Mwesongo, J., Mabiki, F. P., Mwang’onde, B. J., Mtambo, M. M., Kusiluka, L. J., Mdegela, R. H. & Olsen, John Elmerdahl, 2023, In: Research Journal of Pharmacognosy. 10, 2, p. 47-56 10 p.

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

    50. Published

      Bakteriel resistens overfor desinfektionsmidler

      Aarestrup, F. M., Hasman, H. & Olsen, John Elmerdahl, 2001, In: Dansk Veterinærtidsskrift. 84, 21, p. 6-13 8 p.

      Research output: Contribution to journal › Journal article › Research

    51. Published

      Biochemical and molecular characterization of Salmonella enterica serovar berta, and comparison of methods for typing

      Olsen, John Elmerdahl & Bisgaard, M., Apr 1992, In: Epidemiology and Infection. 108, 2, p. 243-260 18 p.

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

    52. Published

      Biocide and antibiotic susceptibility of Salmonella isolates obtained before and after cleaning at six Danish pig slaughterhouses

      Gantzhorn, M. R., Pedersen, K., Olsen, John Elmerdahl & Thomsen, Line Elnif, 2014, In: International Journal of Food Microbiology. 181, p. 53-59 7 p.

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

    53. Published

      Biology of salmonella enterica serovar gallinarum host-specificiti in the avian host.

      Olsen, John Elmerdahl, Chadfield, M. S., Aabo, S., Brown, D. J. & Christensen, Jens Peter, 2003, ASM Conferences. American Society of Microbiology, p. 22 1 p.

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

    54. Published

      CTX-M-1 β-lactamase expression in Escherichia coli is dependent on cefotaxime concentration, growth phase and gene location

      Kjeldsen, T. S. B., Overgaard, M., Nielsen, Søren Saxmose, Bortolaia, V., Jelsbak, L., Sommer, M., Guardabassi, Luca & Olsen, John Elmerdahl, 2015, In: Journal of Antimicrobial Chemotherapy. 70, 1, p. 62-70 9 p.

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

    55. Published

      Change in attachment of Salmonella typhimurium, Yersinia enterocolitica and Listeria monocytogenes to pork skin and muscle after hot water and lactic acid decontamination

      Morild, R. K., Olsen, John Elmerdahl & Aabo, S., 2011, In: International Journal of Food Microbiology. 145, 1, p. 353-358 6 p.

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

    56. Published

      Characterisation of attenuated crp mutants of Salmonella enterica biotype gallinarum

      Chadfield, M. S., Rosu, V., Santona, A., Rubino, S. & Olsen, John Elmerdahl, 2002. 2 p.

      Research output: Contribution to conference › Paper › Research

    57. Published

      Characterisation of commensal Escherichia coli isolated from apparently healthy cattle and their attendants in Tanzania

      Madoshi, B., Kudirkiene, E., Mtambo, M., Muhairva, A., Lupindu, A. & Olsen, John Elmerdahl, 15 Dec 2016, In: P L o S One. 11, 12, 19 p., e0168160.

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

    58. Published

      Characterisation of streptomycin resistance determinants in Danish isolates of Salmonella Typhimurium

      Madsen, L., Aarestrup, F. M. & Olsen, John Elmerdahl, 2000, In: Veterinary Microbiology. 75, p. 73-82 10 p.

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

    59. Published

      Characterization of DegU: a response regulator in Listeria monocytogenes, involved in regulation of motility and contributes to virulence

      Knudsen, G. M., Olsen, John Elmerdahl & Dons, L. E., 2004, In: FEMS Microbiology Letters. 240, p. 171-179 9 p.

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

    60. Published

      Characterization of E. coli isolates originating from a Danish broiler parent flock during a longitudinal study

      Christensen, Jens Peter, Brown, D. J., Olsen, John Elmerdahl & Bisgaard, M., 2000.

      Research output: Contribution to conference › Paper › Research

    61. Published

      Characterization of Salmonella Enterica Serovar Gallinarum Biovars Gallinarum and Pullorum By Plasmid Profiling and Biochemical Analysis

      Christensen, Jens Peter, Olsen, John Elmerdahl, Hansen, H. C. & Bisgaard, M., 1 Sep 1992, In: Avian Pathology. 21, 3, p. 461-470 10 p.

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

    62. Published

      Characterization of non-virulence plasmids with homology to the virulence plasmid of Salmonella dublin

      Aabo, S., Olsen, John Elmerdahl, Threlfall, E. J. & Brown, D. J., 1995, In: Research in Microbiology. 146, p. 751-759 7 p.

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

    63. Published

      Characterization of sucrose-negative Pasteurella multocida variants, including isolates from large-cat bite wounds

      Christensen, Henrik, Bisgaard, M., Angen, Ø., Frederiksen, W. & Olsen, John Elmerdahl, 2005, In: Journal of Clinical Microbiology. 43, 1, p. 259-270 12 p.

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

    64. 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

    65. Published

      Characterization of two putative Listeria monocytogenes encoding polypeptides homologous to the sensor protein CheA and the responce regulator CheY of chemotoxis

      Dons, L. E., Olsen, John Elmerdahl & Rasmussen, O. F., 1994, In: The jounr. of Seguencing and Mapping. 4, p. 301 12 p.

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

    66. Published

      Characterization of two putative listeria monocytogenes genes encoding polypeptides homologous to the sensor protein chea and the response regulator chey of chemotaxis

      Dons, L., Olsen, John Elmerdahl & Rasmussen, O. F., 1994, In: DNA Sequence. 4, 5, p. 301-311 11 p.

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

    67. Published

      Chemotaxis of Vibrio anguillarum to fish mucus: role of the origin of the fish mucus, the fish species and the serogroup of the pathogen

      Larsen, M. H., Larsen, J. L. & Olsen, John Elmerdahl, 2001, In: FEMS Microbiology Ecology. 38, p. 77-80 4 p.

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

    68. Published

      Cholera hotspots and surveillance constraints contributing to recurrent epidemics in Tanzania

      Hounmanou, Yaovi Mahuton Gildas, Mølbak, Kåre, Kähler, J., Mdegela, R. H., Olsen, John Elmerdahl & Dalsgaard, Anders, 2019, In: BMC Research Notes. 12, 6 p., 664.

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

    69. 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

    70. Published

      Class I integrons containing a dhfrI trimethoprim resistance gene cassette in aquatic Acinetobacter spp.

      Petersen, A., Guardabassi, Luca, Dalsgaard, Anders & Olsen, John Elmerdahl, 2000, In: FEMS Microbiology Letters. 182, p. 73-76 4 p.

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

    71. Published

      Classification and description of new taxa of Pasteurellaceae associated with Maridae and proposal of new genus Muribacterium gen. nov: B-1314

      Christensen, Henrik, Bisgaard, M., Fink, M. & Olsen, John Elmerdahl, 2005, Abstracts of the 11. international congress of bacteriology and applied microbiology. IUMS, p. 70 1 p.

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

    72. Published

      Clonal lines of Salmonella enterica serotype Enteritidis documented by IS200-, ribo-, pulsed-field gel electrophoresis and RFLP typing

      Olsen, John Elmerdahl, Skov, M. N., Threlfall, E. J. & Brown, D. J., 1994, In: Journal of Medical Microbiology. 40, 1, p. 15-22 8 p.

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

    73. Published

      Cloning and characteriza

      Dons, L. E., Rasmussen, O. F. & Olsen, John Elmerdahl, 1992, In: Molecular Microbiology. (1992) 6 (20), p. 2919 11 p.

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

    74. Published

      Cloning and characterization of a gene encoding flagellin of Listeria monocytogenes

      Dons, L. & Olsen, John Elmerdahl, Oct 1992, In: Molecular Microbiology. 6, 20, p. 2919-2929 11 p.

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

    75. Published

      ClpP deletion causes attenuation of Salmonella Typhimurium virulence through mis-regulation of RpoS and indirect control of CsrA and the SPI genes

      Knudsen, G. M., Olsen, John Elmerdahl, Aabo, S., Barrow, P., Rychlik, I. & Thomsen, Line Elnif, 2013, In: Microbiology. 159, 7, p. 1497-1509 13 p.

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

    76. Published

      ClpP is involved in the stress response and degradation of misfolded proteins in Salmonella enterica serovar typhimurium

      Thomsen, Line Elnif, Olsen, John Elmerdahl, Foster, J. W. & Ingmer, Hanne, 2002, In: Microbiology. 148, p. 2727-2733 7 p.

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

    77. Published

      Co-occurrence of antimicrobial and metal resistance genes in pig feces and agricultural fields fertilized with slurry

      Peng, S., Zheng, H., Herrero-Fresno, A., Olsen, John Elmerdahl, Dalsgaard, Anders & Ding, Z., 2021, In: Science of the Total Environment. 792, 148259.

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

    78. Published

      Colonization resistance and immunological differences in response to an experimental Salmonella infection between two chicken lines selectively bred for high or low concentration of mannonse-binding lectin: SSI13-2018

      Ulrich-Lynge, S. L., Sørensen Dalgaard, T., Norup, L. R., Olsen, John Elmerdahl & Juul-Madsen, H. R., 2013, Scandinavian Journal of Immunology: SSI 2013 Abstract Submission and Innate Immunity. Vol. 77. p. 274-274

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

    79. Published

      Combining Salmonella Dublin genome information and contact-tracing to substantiate a new approach for improved detection of infectious transmission routes in cattle populations

      de Knegt, Leonardo Victor, Kudirkiene, E., Rattenborg, E., Sørensen, G., Denwood, Matt, Olsen, John Elmerdahl & Nielsen, Liza Rosenbaum, 2020, In: Preventive Veterinary Medicine. 181, 104531 p.

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

    80. Published

      Comparative Pathogenesis of Experimental Infections with Salmonella gallinarum in Local and Commericial Chickens. Propical Animal Health and Production, 34

      Mdegela, R. H., Msoffe, P. L. M., Waihenya, R. W., Kasanga, J. C., Mtambo, M. M. A., Minga, U. M. & Olsen, John Elmerdahl, 2002, In: Propical Animal Health and Production. 34, p. 195-204 10 p.

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

    81. Published

      Comparative investigations on the invasion of Salmonella serotypes in a chicken intestinal loop assay and cell culture assays

      Christensen, Jens Peter, Aabo, S., Chadfield, M. S., Cartensen, N., Olsen, John Elmerdahl & Bisgaard, M., 2001. 1 p.

      Research output: Contribution to conference › Paper › Research

    82. Published

      Comparative pathogenesis of experimental infections with Salmonella gallinarum in local and commercial chickens

      Mdegela, R. H., Msoffe, P. L. M., Waihenya, R. W., Kasanga, J. C., Mtambo, M. M. A., Minga, U. M. & Olsen, John Elmerdahl, 2002, In: Tropical Animal Health and Production. 34, 3, p. 195-204 10 p.

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

    83. Published

      Comparative phylogenies of the housekeeping genes atpD, infB and rpoB and the 16S rRNA gene within the Pasteurellaceae

      Christensen, Henrik, Kuhnert, P., Olsen, John Elmerdahl & Bisgaard, M., 2004, In: International Journal of Systematic and Evolutionary Microbiology. 54, p. 1601-1609 9 p.

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

    84. Published

      Comparative study of PCR methods to detect Pasteurella multocida

      Adhikary, S., Bisgaard, M., Foster, G., Kiessling, N., Fahlen, A. R., Olsen, John Elmerdahl & Christensen, Henrik, 2013, In: Berliner und Muenchener Tieraerztliche Wochenschrift. 126, 9/10, p. 415-422 8 p.

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

    85. Published

      Comparision between flourescent In situ hybridization (fish) and culture method in the detection of Pasteurella multocida in organs of indigenous birds

      Mbuthia, P. G., Njagi, L. W., Nyaga, P. N., Bebora, L. C., Mugera, G. M., Kamundia, J., Minga, U. & Olsen, John Elmerdahl, 2005, In: Kenya Veterinarian. 29, p. 53-56 4 p.

      Research output: Contribution to journal › Journal article › Research

    86. Published

      Comparision of the Carrier Status of Pasterurella multocida between Farm and Live Market Indigenous Birds

      Mbuthia, P. G., Njagi, L. W., Nyaga, P. N., Bebora, L. C., Mugera, G. M., Kamundia, J., Minga, U. M. & Olsen, John Elmerdahl, 2005, In: Kenya Veterinarian. 29, p. 45-47 3 p.

      Research output: Contribution to journal › Journal article › Research

    87. 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

    88. Published

      Comparison of heat stress responses of immobilized and planktonic Salmonella enterica serovar Typhimurium

      Nielsen, M., Knudsen, G. M., Danino-Appleton, V., Olsen, John Elmerdahl & Thomsen, Line Elnif, 2013, In: Food Microbiology. 33, 2, p. 221-227 7 p.

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

    89. Published

      Comparison of intestinal invasion and macrophage response of Salmonella Gallinarum and other host adapted Salmonella enterica serovars in the avian host

      Chadfield, M. S., Brown, D. J., Aabo, S., Christensen, Jens Peter & Olsen, John Elmerdahl, 2003, In: Veterinary Microbiology. 92, 2003, p. 49-64 15 p.

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

    90. Published

      Construction of genetic markers for the study of Salmonella typhimurium infection of murine macrophages

      Jelsbak, L. & Olsen, John Elmerdahl, 2009. 1 p.

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

    91. Published

      Correlation between viable counts of Salmonella Gallinarum in spleen and liver and the development of anaemia in chickens as seen in experimental fowl typhoid

      Christensen, Jens Peter, Barrow, P. A., Olsen, John Elmerdahl, Dirch Poulsen, J. S. & Bisgaard, M., 1996, In: Avian Pathology. 25, p. 769-783 15 p.

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

    92. Published

      Cross-contamination with Salmonella on a broiler slaughterhouse line demonstrated by use of epidemiological markers

      Olsen, John Elmerdahl, Brown, D. J., Madsen, M. & Bisgaard, M., 2003, In: Journal of Applied Microbiology. 94, 5, p. 826-835 10 p.

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

    93. Published

      Cross-sontamination with Salmonella on a broiler slaughter house line demonstrated by use of epidemiological markers. Journ. of Applied Microbiology 2003, 94, 826-835.

      Olsen, John Elmerdahl, Brown, D. J., Madsen, M. & Bisgaard, M., 2003, In: Journ. of Applied Microbiology. 94, p. 826-835 10 p.

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

    94. Published

      Current manure management practices and hygiene aspects of urban and peri-urban livestock farming in Tanzania

      Lupindu, A. M., Ngowi, H. A., Dalsgaard, Anders, Olsen, John Elmerdahl & Msoffe, P. L. M., 2012, In: Livestock Research for Rural Development (Online Edition). 24, 9, 11 p., 167.

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

    95. Published

      DNA-DNA hybridization determined in micro-wells using covalent attachment of DNA

      Christensen, Henrik, Angen, Ø., Mutters, R., Olsen, John Elmerdahl & Bisgaard, M., 2000, In: International Journal of Systematic and Evolutionary Microbiology. 50, p. 1095-1102 8 p.

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

    96. Published

      DNA-based methods for detection of food-borne bacterial pathogens

      Olsen, John Elmerdahl, 2000, In: Food Research International. 33, p. 257-266 10 p.

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

    97. Published

      DNA-diagnostik i relation til levnedsmiddelmikrobiologi

      Olsen, John Elmerdahl, 1997, Ikke angivet. Levnedsmiddelcentret, p. 55 1 p.

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

    98. Published

      DNA-probes and PCR for identification of Salmonella

      Olsen, John Elmerdahl, Aabo, S. & Rossen, L., 1995, Southeast Asian journal of tropical medicine and public health. 26 ed. p. 222-224 3 p.

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

    99. Published

      Demonstration of antibiotic resistance genes strA, blaTEM, tetA, tetC and sul2 in Avibacterium paragallinarum

      Byarugaba, D. K., Minga, U. M., Gwakisa, P. S., Katunguka-Rwakishaya, E., Bisgaard, M., Christensen, Henrik & Olsen, John Elmerdahl, 2011, In: African Journal of Microbiology Research. 5, 22, p. 3624-3627 4 p.

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

    100. Published

      Demonstration of persistent contamination of a cooked egg product production facility with Salmonella enterica serovar Tennessee and characterization of the persistent strain

      Jakociune, D., Bisgaard, M., Pedersen, K. & Olsen, John Elmerdahl, 2014, In: Journal of Applied Microbiology. 117, 2, p. 547-553 7 p.

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

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    ID: 4236663