John Elmerdahl Olsen
Professor
Veterinary Clinical Microbiology
Stigbøjlen 4, 1870 Frederiksberg C
Member of:
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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
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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
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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
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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
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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
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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
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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
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A manual of basic tools in bioinformatics
Christensen, Henrik & Olsen, John Elmerdahl, 2003, 35 p.Research output: Book/Report › Compendium/lecture notes › Education
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A manual of basic tools in bioinformatics
Christensen, Henrik & Olsen, John Elmerdahl, 2003. 34 p.Research output: Contribution to conference › Paper › Research
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Adaptation of Salmonella Typhimurium to triclosan
Gantzhorn, M. R., Olsen, John Elmerdahl & Thomsen, Line Elnif, 2012.Research output: Contribution to conference › Poster › Research
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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, 10Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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Bacterial resistance to antimicrocials in a practical perspective
Olsen, John Elmerdahl & Mrenoski, S., 2003. 7 p.Research output: Contribution to conference › Paper › Research
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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. 274-274Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
ID: 4236663
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The role of ClpP, RpoS and CsrA in growth and filament formation of Salmonella enterica serovar Typhimurium at low temperature
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Identification of redundant metabolic pathways essential for virulence of Salmonella Typhimurium: Abstract book I3S International Symposium Salmonella and Salmonellosis, Saint-Malo, France
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Adaptation of Salmonella Typhimurium to triclosan
Research output: Contribution to conference › Poster › Research
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