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John Elmerdahl Olsen

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Lisa Barco; Federica Barrucci; John Elmerdahl Olsen; Antonia Ricci
Salmonella source attribution based on microbial subtyping.
John Elmerdahl Olsen; Jesper Rosenkranzt; Josep Casadesús; Mark Simon Chadfield; Kirsten Hobolt Hoegh-Andersen; Line Elnif Thomsen
The role of flagella and chemotaxis genes in host pathogen interaction of the host adapted Salmonella enterica serovar Dublin compared to the broad host range serovar S. Typhimurium.
Luca Guardabassi; Arshnee Moodley; Yvonne Agersø; Carmen Espinosa-Gongora; Tina Steiner Petersen; Kristina Runge Schmidt; John Elmerdahl Olsen
Mustelidae are natural hosts of Staphylococcus delphini group A.

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All Publications

2013: Lisa Barco; Federica Barrucci; John Elmerdahl Olsen; Antonia Ricci
Salmonella source attribution based on microbial subtyping.
International journal of food microbiology 2013;163(2-3):193-203.
2013: John Elmerdahl Olsen; Jesper Rosenkranzt; Josep Casadesús; Mark Simon Chadfield; Kirsten Hobolt Hoegh-Andersen; Line Elnif Thomsen
The role of flagella and chemotaxis genes in host pathogen interaction of the host adapted Salmonella enterica serovar Dublin compared to the broad host range serovar S. Typhimurium.
BMC microbiology 2013;13():67.
2012: Luca Guardabassi; Arshnee Moodley; Yvonne Agersø; Carmen Espinosa-Gongora; Tina Steiner Petersen; Kristina Runge Schmidt; John Elmerdahl Olsen
Mustelidae are natural hosts of Staphylococcus delphini group A.
Veterinary microbiology 2012;159(3-4):351-3.
2012: Lotte Jelsbak; Peter Ruhdal Jensen; Line Elnif Thomsen; Inke Wallrodt; John Elmerdahl Olsen
Polyamines are required for virulence in Salmonella enterica serovar Typhimurium.
PloS one 2012;7(4):e36149.
2011: PG Mbuthia; UM Minga; L W Njagi; PN Nyaga; LC Bebora; J P Christensen; John Elmerdahl Olsen
Time-course investigation of infection with a low virulent Pasteurella multocida strain in normal and immune-suppressed 12-week-old free-range chickens.
Avian pathology : journal of the W.V.P.A 2011;40(6):629-37.
2011: Eglė Kudirkienė; Jurgita Bunevičienė; Lone Brøndsted; Hanne Ingmer; John Elmerdahl Olsen; Mindaugas Malakauskas
Evidence of broiler meat contamination with post-disinfection strains of Campylobacter jejuni from slaughterhouse.
International journal of food microbiology 2011;145 Suppl 1():S116-20.
2009: Andreas Petersen; Frank Møller Aarestrup; John Elmerdahl Olsen
The in vitro fitness cost of antimicrobial resistance in Escherichia coli varies with the growth conditions.
FEMS microbiology letters 2009;299(1):53-9.
2009: Jesper Larsen; Anders G Pedersen; Robert L Davies; Peter Kuhnert; Joachim Frey; Henrik Christensen; Magne Bisgaard; John Elmerdahl Olsen
Evolution of the leukotoxin promoter in genus Mannheimia.
BMC evolutionary biology 2009;9():121.
2008: Tina Broennum Pedersen; John Elmerdahl Olsen; Magne Bisgaard
Persistence of Salmonella Senftenberg in poultry production environments and investigation of its resistance to desiccation.
Avian pathology : journal of the W.V.P.A 2008;37(4):421-7.
2008: PG Mbuthia; L W Njagi; PN Nyaga; LC Bebora; UM Minga; J Kamundia; John Elmerdahl Olsen
Pasteurella multocida in scavenging family chickens and ducks: carrier status, age susceptibility and transmission between species.
Avian pathology : journal of the W.V.P.A 2008;37(1):51-7.
2007: Anders Miki Bojesen; Maria Elena Vazquez; Fransisco Robles; Carlos Gonzalez; Edgardo V Soriano; John Elmerdahl Olsen; Henrik Christensen
Specific identification of Gallibacterium by a PCR using primers targeting the 16S rRNA and 23S rRNA genes.
Veterinary microbiology 2007;123(1-3):262-8.
2007: Denis K Byarugaba; UM Minga; PS Gwakisa; E Katunguka-Rwakishaya; M Bisgaard; John Elmerdahl Olsen
Investigations of the occurrence of Avibacterium paragallinarum infections in Uganda.
Avian diseases 2007;51(2):534-9.
2007: Jesper Larsen; Anders G Pedersen; Henrik Christensen; Magne Bisgaard; Øystein Angen; Peter Ahrens; John Elmerdahl Olsen
Evidence for vertical inheritance and loss of the leukotoxin operon in genus Mannheimia.
Journal of molecular evolution 2007;64(4):423-37.
2007: Denis K Byarugaba; UM Minga; PS Gwakisa; E Katunguka-Rwakishaya; M Bisgaard; John Elmerdahl Olsen
Virulence characterization of Avibacterium paragallinarum isolates from Uganda.
Avian pathology : journal of the W.V.P.A 2007;36(1):35-42.
2007: Jesper Larsen; Peter Kuhnert; Joachim Frey; Henrik Christensen; Magne Bisgaard; John Elmerdahl Olsen
Analysis of gene order data supports vertical inheritance of the leukotoxin operon and genome rearrangements in the 5' flanking region in genus Mannheimia.
BMC evolutionary biology 2007;7():184.
2007: valentina rosu; Mark S Chadfield; Antonella Santona; Jens P Christensen; Line E Thomsen; antonella santona; John Elmerdahl Olsen
Effects of crp deletion in Salmonella enterica serotype Gallinarum.
Acta veterinaria Scandinavica 2007;49():14.
2006: Henrik Christensen; J Hommez; John Elmerdahl Olsen; Magne Bisgaard
[Pasteurella] caballi infection not limited to horses - a closer look at taxon 42 of Bisgaard.
Letters in applied microbiology 2006;43(4):424-9.
2006: Marianne H Larsen; Birgitte H Kallipolitis; Janne Klitgaard; John Elmerdahl Olsen; Hanne Ingmer
The response regulator ResD modulates virulence gene expression in response to carbohydrates in Listeria monocytogenes.
Molecular microbiology 2006;61(6):1622-35.
2006: P L M Msoffe; UM Minga; M M A Mtambo; PS Gwakisa; John Elmerdahl Olsen
Differences in resistance to Salmonella enterica serovar Gallinarum infection among indigenous local chicken ecotypes in Tanzania.
Avian pathology : journal of the W.V.P.A 2006;35(4):270-6.
2006: John Elmerdahl Olsen; Henrik Christensen; Frank M Aarestrup
Diversity and evolution of blaZ from Staphylococcus aureus and coagulase-negative staphylococci.
The Journal of antimicrobial chemotherapy 2006;57(3):450-60.
2006: Louise L Poulsen; Turiğ M Reinert; Rikke L Sand; Magne Bisgaard; Henrik Christensen; John Elmerdahl Olsen; Snorre Stuen; Anders Miki Bojesen
Occurrence of haemolytic Mannheimia spp. in apparently healthy sheep in Norway.
Acta veterinaria Scandinavica 2006;47():70.
2005: Marie Louise Grøndahl; Martin Andreas Unmack; Helga Berglind Ragnarsdóttir; Mark Berner Hansen; John Elmerdahl Olsen; Erik Skadhauge
Effects of nitric oxide in 5-hydroxytryptamine-, cholera toxin-, enterotoxigenic Escherichia coli- and Salmonella Typhimurium-induced secretion in the porcine small intestine.
Comparative biochemistry and physiology. Part A, Molecular & integrative physiology 2005;141(4):476-84.
2005: Henrik Christensen; Peter Kuhnert; Magne Bisgaard; Reinier Mutters; Francis Dziva; John Elmerdahl Olsen
Emended description of porcine [Pasteurella] aerogenes, [Pasteurella] mairii and [Actinobacillus] rossii.
International journal of systematic and evolutionary microbiology 2005;55(Pt 1):209-23.
2005: Henrik Christensen; Magne Bisgaard; Oystein Angen; Wilhelm C Frederiksen; John Elmerdahl Olsen
Characterization of sucrose-negative Pasteurella multocida variants, including isolates from large-cat bite wounds.
Journal of clinical microbiology 2005;43(1):259-70.
2005: Kirsten Schauser; John Elmerdahl Olsen; Lars-Inge Larsson
Salmonella typhimurium infection in the porcine intestine: evidence for caspase-3-dependent and -independent programmed cell death.
Histochemistry and cell biology 2005;123(1):43-50.
2004: Gitte Moos Knudsen; John Elmerdahl Olsen; Lone Dons
Characterization of DegU, a response regulator in Listeria monocytogenes, involved in regulation of motility and contributes to virulence.
FEMS microbiology letters 2004;240(2):171-9.
2004: L W Njagi; PG Mbuthia; LC Bebora; PN Nyaga; UM Minga; John Elmerdahl Olsen
Sensitivity of Listeria species, recovered from indigenous chickens to antibiotics and disinfectants.
East African medical journal 2004;81(10):534-7.
2004: L W Njagi; PG Mbuthia; LC Bebora; PN Nyaga; UM Minga; John Elmerdahl Olsen
Carrier status for Listeria monocytogenes and other Listeria species in free range farm and market healthy indigenous chickens and ducks.
East African medical journal 2004;81(10):529-33.
2004: Henrik Christensen; Peter Kuhnert; John Elmerdahl Olsen; Magne Bisgaard
Comparative phylogenies of the housekeeping genes atpD, infB and rpoB and the 16S rRNA gene within the Pasteurellaceae.
International journal of systematic and evolutionary microbiology 2004;54(Pt 5):1601-9.
2004: Francis Dziva; H Christensen; L A M G van Leengoed; Krishna Mohan; John Elmerdahl Olsen
Differentiation of Pasteurella multocida isolates from cases of atrophic rhinitis in pigs from Zimbabwe by RAPD and ribotyping.
Veterinary microbiology 2004;102(1-2):117-22.
2004: Kirsten Schauser; John Elmerdahl Olsen; Lars-Inge Larsson
Immunocytochemical studies of Salmonella Typhimurium invasion of porcine jejunal epithelial cells.
Journal of medical microbiology 2004;53(Pt 7):691-5.
2004: Henrik Christensen; Øystein Angen; John Elmerdahl Olsen; Magne Bisgaard
Revised description and classification of atypical isolates of Pasteurella multocida from bovine lungs based on genotypic characterization to include variants previously classified as biovar 2 of Pasteurella canis and Pasteurella avium.
Microbiology (Reading, England) 2004;150(Pt 6):1757-67.
2004: Lone Dons; Emma Eriksson; Yuxuan Jin; Martin Rottenberg; Krister Kristensson; Charlotte N Larsen; José Bresciani; John Elmerdahl Olsen
Role of flagellin and the two-component CheA/CheY system of Listeria monocytogenes in host cell invasion and virulence.
Infection and immunity 2004;72(6):3237-44.
2004: John Elmerdahl Olsen; Derek Brown; Line E Thomsen; David J Platt; Mark S Chadfield
Differences in the carriage and the ability to utilize the serotype associated virulence plasmid in strains of Salmonella enterica serotype Typhimurium investigated by use of a self-transferable virulence plasmid, pOG669.
Microbial pathogenesis 2004;36(6):337-47.
2004: Henrik Christensen; Magne Bisgaard; Bent Aalbaek; John Elmerdahl Olsen
Reclassification of Bisgaard taxon 33, with proposal of Volucribacter psittacicida gen. nov., sp. nov. and Volucribacter amazonae sp. nov. as new members of the Pasteurellaceae.
International journal of systematic and evolutionary microbiology 2004;54(Pt 3):813-8.
2004: Marianne H Larsen; Nicholas Blackburn; Jens Laurits Larsen; John Elmerdahl Olsen
Influences of temperature, salinity and starvation on the motility and chemotactic response of Vibrio anguillarum.
Microbiology (Reading, England) 2004;150(Pt 5):1283-90.
2003: Jan Vintov; Frank M Aarestrup; Christina Elsberg Zinn; John Elmerdahl Olsen
Phage types and antimicrobial resistance among Danish bovine Staphylococcus aureus isolates since the 1950s.
Veterinary microbiology 2003;97(1-2):63-72.
2003: Line E Thomsen; Mark S Chadfield; Jennifer Bispham; Timothy S Wallis; John Elmerdahl Olsen; Hanne Ingmer
Reduced amounts of LPS affect both stress tolerance and virulence of Salmonella enterica serovar Dublin.
FEMS microbiology letters 2003;228(2):225-31.
2003: Anders Miki Bojesen; Henrik Christensen; Ole Lerberg Nielsen; John Elmerdahl Olsen; Magne Bisgaard
Detection of Gallibacterium spp. in chickens by fluorescent 16S rRNA in situ hybridization.
Journal of clinical microbiology 2003;41(11):5167-72.
2003: Jan Vintov; Frank M Aarestrup; Christina Elsberg Zinn; John Elmerdahl Olsen
Association between phage types and antimicrobial resistance among bovine Staphylococcus aureus from 10 countries.
Veterinary microbiology 2003;95(1-2):133-47.
2003: Anders Miki Bojesen; Mia Torpdahl; Henrik Christensen; John Elmerdahl Olsen; Magne Bisgaard
Genetic diversity of Gallibacterium anatis isolates from different chicken flocks.
Journal of clinical microbiology 2003;41(6):2737-40.
2003: Mark S Chadfield; Derek Brown; Søren Aabo; Jens P Christensen; John Elmerdahl Olsen
Comparison of intestinal invasion and macrophage response of Salmonella Gallinarum and other host-adapted Salmonella enterica serovars in the avian host.
Veterinary microbiology 2003;92(1-2):49-64.
2003: H Christensen; G Foster; Jens P Christensen; T Pennycott; John Elmerdahl Olsen; Magne Bisgaard
Phylogenetic analysis by 16S rDNA gene sequence comparison of avian taxa of Bisgaard and characterization and description of two new taxa of Pasteurellaceae.
Journal of applied microbiology 2003;95(2):354-63.
2003: John Elmerdahl Olsen; Derek Brown; Mogens Madsen; Magne Bisgaard
Cross-contamination with Salmonella on a broiler slaughterhouse line demonstrated by use of epidemiological markers.
Journal of applied microbiology 2003;94(5):826-35.
2003: Henrik Christensen; Magne Bisgaard; Anders Miki Bojesen; Reinier Mutters; John Elmerdahl Olsen
Genetic relationships among avian isolates classified as Pasteurella haemolytica, 'Actinobacillus salpingitidis' or Pasteurella anatis with proposal of Gallibacterium anatis gen. nov., comb. nov. and description of additional genomospecies within Gallibacterium gen. nov.
International journal of systematic and evolutionary microbiology 2003;53(Pt 1):275-87.
2003: Henrik Christensen; Magne Bisgaard; Jesper Larsen; John Elmerdahl Olsen
PCR-detection of Hemophilus paragallinarum, Hemophilus somnus, Mannheimia (Pasteurella) hemolytica, Mannheimia spp., Pasteurella trehalosi, and Pasteurella multocida.
Methods in molecular biology (Clifton, N.J.) 2003;216():257-74.
2002: Henrik Christensen; Francis Dziva; John Elmerdahl Olsen; Magne Bisgaard
Genotypic heterogeneity of Pasteurella gallinarum as shown by ribotyping and 16S rRNA sequencing.
Avian pathology : journal of the W.V.P.A 2002;31(6):603-10.
2002: N A Mwalusanya; A M Katule; S K Mutayoba; M M A Mtambo; John Elmerdahl Olsen; UM Minga
Productivity of local chickens under village management conditions.
Tropical animal health and production 2002;34(5):405-16.
2002: Henrik Christensen; Magne Bisgaard; John Elmerdahl Olsen
Reclassification of equine isolates previously reported as Actinobacillus equuli, variants of A. equuli, Actinobacillus suis or Bisgaard taxon 11 and proposal of A. equuli subsp. equuli subsp. nov. and A. equuli subsp. haemolyticus subsp. nov.
International journal of systematic and evolutionary microbiology 2002;52(Pt 5):1569-76.
2002: Line E Thomsen; John Elmerdahl Olsen; J W Foster; Hanne Ingmer
ClpP is involved in the stress response and degradation of misfolded proteins in Salmonella enterica serovar Typhimurium.
Microbiology (Reading, England) 2002;148(Pt 9):2727-33.
2002: Henrik Christensen; Magne Bisgaard; Oystein Angen; John Elmerdahl Olsen
Final classification of Bisgaard taxon 9 as Actinobacillus arthritidis sp. nov. and recognition of a novel genomospecies for equine strains of Actinobacillus lignieresii.
International journal of systematic and evolutionary microbiology 2002;52(Pt 4):1239-46.
2002: Robinson H Mdegela; P L M Msoffe; R W Waihenya; J C Kasanga; M M A Mtambo; UM Minga; John Elmerdahl Olsen
Comparative pathogenesis of experimental infections with Salmonella gallinarum in local and commercial chickens.
Tropical animal health and production 2002;34(3):195-204.
2002: N A Mwalusanya; A M Katule; S K Mutayoba; UM Minga; M M A Mtambo; John Elmerdahl Olsen
Nutrient status of crop contents of rural scavenging local chickens in Tanzania.
British poultry science 2002;43(1):64-9.
2002: Søren Aabo; Jens P Christensen; Mark S Chadfield; Bendix Carstensen; John Elmerdahl Olsen; Magne Bisgaard
Quantitative comparison of intestinal invasion of zoonotic serotypes of Salmonella enterica in poultry.
Avian pathology : journal of the W.V.P.A 2002;31(1):41-7.
2001: Henrik Christensen; Magne Bisgaard; Wilhelm C Frederiksen; Reinier Mutters; Peter Kuhnert; John Elmerdahl Olsen
Is characterization of a single isolate sufficient for valid publication of a new genus or species? Proposal to modify recommendation 30b of the Bacteriological Code (1990 Revision).
International journal of systematic and evolutionary microbiology 2001;51(Pt 6):2221-5.
2001: Kamille D Petersen; Henrik Christensen; Magne Bisgaard; John Elmerdahl Olsen
Genetic diversity of Pasteurella multocida fowl cholera isolates as demonstrated by ribotyping and 16S rRNA and partial atpD sequence comparisons.
Microbiology (Reading, England) 2001;147(Pt 10):2739-48.
2001: Francis Dziva; H Christensen; John Elmerdahl Olsen; Krishna Mohan
Random amplification of polymorphic DNA and phenotypic typing of Zimbabwean isolates of Pasteurella multocida.
Veterinary microbiology 2001;82(4):361-72.
2001: P L M Msoffe; UM Minga; John Elmerdahl Olsen; M G Yongolo; H R Juul-Madsen; PS Gwakisa; M M A Mtambo
Phenotypes including immunocompetence in scavenging local chicken ecotypes in Tanzania.
Tropical animal health and production 2001;33(4):341-54.
2001: PG Mbuthia; Henrik Christensen; M Boye; K M Petersen; Magne Bisgaard; PN Nyaga; John Elmerdahl Olsen
Specific detection of Pasteurella multocida in chickens with fowl cholera and in pig lung tissues using fluorescent rRNA in situ hybridization.
Journal of clinical microbiology 2001;39(7):2627-33.
2001: Martin Andreas Unmack; Mark Berner Hansen; M L Grondahl; John Elmerdahl Olsen; P Christensen; Erik Skadhauge
Effects of indomethacin on Salmonella typhimurium- and cholera toxin-induced fluid accumulation in the porcine small intestine.
Journal of veterinary medicine. A, Physiology, pathology, clinical medicine 2001;48(3):153-63.
2000: Søren Aabo; Jens P Christensen; Mark S Chadfield; Bendix Carstensen; T K Jensen; Magne Bisgaard; John Elmerdahl Olsen
Development of an in vivo model for study of intestinal invasion by Salmonella enterica in chickens.
Infection and immunity 2000;68(12):7122-5.
2000: Sergio Uzzau; Derek Brown; Timothy S Wallis; Salvatore Rubino; Guido Sisinnio Leori; S Bernard; Josep Casadesús; David J Platt; John Elmerdahl Olsen
Host adapted serotypes of Salmonella enterica.
Epidemiology and infection 2000;125(2):229-55.
2000: Luca Guardabassi; Lenie Dijkshoorn; J M Collard; John Elmerdahl Olsen; Anders Dalsgaard
Distribution and in-vitro transfer of tetracycline resistance determinants in clinical and aquatic Acinetobacter strains.
Journal of medical microbiology 2000;49(10):929-36.
2000: L Madsen; F M Aarestrup; John Elmerdahl Olsen
Characterisation of streptomycin resistance determinants in Danish isolates of Salmonella Typhimurium.
Veterinary microbiology 2000;75(1):73-82.
2000: Henrik Christensen; Oystein Angen; Reinier Mutters; John Elmerdahl Olsen; Magne Bisgaard
DNA-DNA hybridization determined in micro-wells using covalent attachment of DNA.
International journal of systematic and evolutionary microbiology 2000;50 Pt 3():1095-102.
2000: Søren Aabo; Derek Brown; John Elmerdahl Olsen
Virulence characterization of a strain of Salmonella enterica subspecies houten (subspecies IV) with chromosomal integrated Salmonella plasmid virulence (spv) genes.
Research in microbiology 2000;151(3):183-9.
2000: Andreas Petersen; Luca Guardabassi; Anders Dalsgaard; John Elmerdahl Olsen
Class I integrons containing a dhfrI trimethoprim resistance gene cassette in aquatic Acinetobacter spp.
FEMS microbiology letters 2000;182(1):73-6.
1999: John Elmerdahl Olsen; T Tiainen; Derek Brown
Levels of virulence are not determined by genomic lineage of Salmonella enterica serotype Enteritidis strains.
Epidemiology and infection 1999;123(3):423-30.
1999: Luca Guardabassi; Anders Dalsgaard; John Elmerdahl Olsen
Phenotypic characterization and antibiotic resistance of Acinetobacter spp. isolated from aquatic sources.
Journal of applied microbiology 1999;87(5):659-67.
1999: Lone Dons; K Weclewicz; Y Jin; E Bindseil; John Elmerdahl Olsen; K Kristensson
Rat dorsal root ganglia neurons as a model for Listeria monocytogenes infections in culture.
Medical microbiology and immunology 1999;188(1):15-21.
1999: MN Skov; Oystein Angen; M Chriél; John Elmerdahl Olsen; Magne Bisgaard
Risk factors associated with Salmonella enterica serovar typhimurium infection in Danish broiler flocks.
Poultry science 1999;78(6):848-54.
1999: Derek Brown; D L Baggesen; David J Platt; John Elmerdahl Olsen
Phage type conversion in Salmonella enterica serotype Enteritidis caused by the introduction of a resistance plasmid of incompatibility group X (IncX).
Epidemiology and infection 1999;122(1):19-22.
1999: Jørgen J Leisner; Bruno Pot; H Christensen; Gulam Rusul; John Elmerdahl Olsen; B W Wee; K Muhamad; H M Ghazali
Identification of lactic acid bacteria from chili bo, a Malaysian food ingredient.
Applied and environmental microbiology 1999;65(2):599-605.
1999: Oystein Angen; Reinier Mutters; D A Caugant; John Elmerdahl Olsen; Magne Bisgaard
Taxonomic relationships of the [Pasteurella] haemolytica complex as evaluated by DNA-DNA hybridizations and 16S rRNA sequencing with proposal of Mannheimia haemolytica gen. nov., comb. nov., Mannheimia granulomatis comb. nov., Mannheimia glucosida sp. nov., Mannheimia ruminalis sp. nov. and Mannheimia varigena sp. nov.
International journal of systematic bacteriology 1999;49 Pt 1():67-86.
1998: Luca Guardabassi; Andreas Petersen; John Elmerdahl Olsen; Anders Dalsgaard
Antibiotic resistance in Acinetobacter spp. isolated from sewers receiving waste effluent from a hospital and a pharmaceutical plant.
Applied and environmental microbiology 1998;64(9):3499-502.
1998: H Christensen; S Nordentoft; John Elmerdahl Olsen
Phylogenetic relationships of Salmonella based on rRNA sequences.
International journal of systematic bacteriology 1998;48 Pt 2():605-10.
1998: H Christensen; John Elmerdahl Olsen
Phylogenetic relationships of Salmonella based on DNA sequence comparison of atpD encoding the beta subunit of ATP synthase.
FEMS microbiology letters 1998;161(1):89-96.
1998: Marie Louise Grøndahl; G M Jensen; CG Nielsen; Erik Skadhauge; John Elmerdahl Olsen; Mark Berner Hansen
Secretory pathways in Salmonella Typhimurium-induced fluid accumulation in the porcine small intestine.
Journal of medical microbiology 1998;47(2):151-7.
1997: G M Jensen; Marie Louise Grøndahl; CG Nielsen; Erik Skadhauge; John Elmerdahl Olsen; Mark Berner Hansen
Effect of ondansetron on Salmonella typhimurium-induced net fluid accumulation in the pig jejunum in vivo.
Comparative biochemistry and physiology. Part A, Physiology 1997;118(2):297-9.
1997: Oystein Angen; D A Caugant; John Elmerdahl Olsen; Magne Bisgaard
Genotypic relationships among strains classified under the (Pasteurella) haemolytica-complex as indicated by ribotyping and multilocus enzyme electrophoresis.
Zentralblatt für Bakteriologie : international journal of medical microbiology 1997;286(3):333-54.
1997: Oystein Angen; John Elmerdahl Olsen; Magne Bisgaard
Further studies of the relationships among strains classified as taxon 15, taxon 18, taxon 20, (Pasteurella) granulomatis or the (Pasteurella) haemolytica-complex in ruminants using quantitative evaluation of phenotypic data.
Zentralblatt für Bakteriologie : international journal of medical microbiology 1997;286(3):317-32.
1997: Oystein Angen; Bent Aalbaek; E Falsen; John Elmerdahl Olsen; Magne Bisgaard
Relationships among strains classified with the ruminant Pasteurella haemolytica-complex using quantitative evaluation of phenotypic data.
Zentralblatt für Bakteriologie : international journal of medical microbiology 1997;285(4):459-79.
1997: John Elmerdahl Olsen; MN Skov; Oystein Angen; E J Threlfall; Magne Bisgaard
Genomic relationships between selected phage types of Salmonella enterica subsp. enterica serotype typhimurium defined by ribotyping, IS200 typing and PFGE.
Microbiology (Reading, England) 1997;143 ( Pt 4)():1471-9.
1997: Jens P Christensen; Derek Brown; Mogens Madsen; John Elmerdahl Olsen; Magne Bisgaard
Hatchery-borne Salmonella enterica serovar Tennessee infections in broilers.
Avian pathology : journal of the W.V.P.A 1997;26(1):155-68.
1996: Jens P Christensen; P A Barrow; John Elmerdahl Olsen; J S Poulsen; Magne Bisgaard
Correlation between viable counts of Salmonella Gallinarum in spleen and liver and the development of anaemia in chickens as seen in experimental fowl typhoid.
Avian pathology : journal of the W.V.P.A 1996;25(4):769-83.
1996: John Elmerdahl Olsen; MN Skov; J P Christensen; Magne Bisgaard
Genomic lineage of Salmonella enterica serotype Gallinarum.
Journal of medical microbiology 1996;45(6):413-8.
1996: H N Rasmussen; John Elmerdahl Olsen; K Jørgensen; Ole Feldballe Rasmussen
Detection of Campylobacter jejuni and Camp. coli in chicken faecal samples by PCR.
Letters in applied microbiology 1996;23(5):363-6.
1996: John Elmerdahl Olsen; MN Skov; Derek Brown; J P Christensen; Magne Bisgaard
Virulence and genotype stability of Salmonella enterica serovar Berta during a natural outbreak.
Epidemiology and infection 1996;116(3):267-74.
1995: John Elmerdahl Olsen; S Aabo; W Hill; S Notermans; K Wernars; P E Granum; T Popovic; H N Rasmussen; O Olsvik
Probes and polymerase chain reaction for detection of food-borne bacterial pathogens.
International journal of food microbiology 1995;28(1):1-78.
1995: S Aabo; John Elmerdahl Olsen; E J Threlfall; Derek Brown
Characterization of non-virulence plasmids with homology to the virulence plasmid of Salmonella dublin.
Research in microbiology 1995;146(9):751-9.
1995: S Aabo; J K Andersen; John Elmerdahl Olsen
Research note: detection of Salmonella in minced meat by the polymerase chain reaction method.
Letters in applied microbiology 1995;21(3):180-2.
1995: Ole Feldballe Rasmussen; Pernille Skouboe; L Dons; L Rossen; John Elmerdahl Olsen
Listeria monocytogenes exists in at least three evolutionary lines: evidence from flagellin, invasive associated protein and listeriolysin O genes.
Microbiology (Reading, England) 1995;141 ( Pt 9)():2053-61.
1995: H N Rasmussen; Ole Feldballe Rasmussen; H Christensen; John Elmerdahl Olsen
Detection of Yersinia enterocolitica O:3 in faecal samples and tonsil swabs from pigs using IMS and PCR.
The Journal of applied bacteriology 1995;78(5):563-8.
1995: John Elmerdahl Olsen; S Aabo; Ole Feldballe Rasmussen; L Rossen
Oligonucleotide probes specific for the genus Salmonella and for Salm. typhimurium.
Letters in applied microbiology 1995;20(3):160-3.
1994: H N Rasmussen; John Elmerdahl Olsen; Ole Feldballe Rasmussen
RAPD analysis of Yersinia enterocolitica.
Letters in applied microbiology 1994;19(5):359-62.
1994: John Elmerdahl Olsen; Derek Brown; Dorte Lau Baggesen; Magne Bisgaard
Stability of plasmids in five strains of Salmonella maintained in stab culture at different temperatures.
The Journal of applied bacteriology 1994;77(2):155-9.
1994: H N Rasmussen; Ole Feldballe Rasmussen; J K Andersen; John Elmerdahl Olsen
Specific detection of pathogenic Yersinia enterocolitica by two-step PCR using hot-start and DMSO.
Molecular and cellular probes 1994;8(2):99-108.
1994: John Elmerdahl Olsen; MN Skov; E J Threlfall; Derek Brown
Clonal lines of Salmonella enterica serotype Enteritidis documented by IS200-, ribo-, pulsed-field gel electrophoresis and RFLP typing.
Journal of medical microbiology 1994;40(1):15-22.
1994: L Dons; John Elmerdahl Olsen; Ole Feldballe Rasmussen
Characterization of two putative Listeria monocytogenes genes encoding polypeptides homologous to the sensor protein CheA and the response regulator CheY of chemotaxis.
DNA sequence : the journal of DNA sequencing and mapping 1994;4(5):301-11.
1993: Jens P Christensen; John Elmerdahl Olsen; Magne Bisgaard
Ribotypes of Salmonella enterica serovar Gallinarum biovars gallinarum and pullorum.
Avian pathology : journal of the W.V.P.A 1993;22(4):725-38.
1993: John Elmerdahl Olsen; Derek Brown; MN Skov; J P Christensen
Bacterial typing methods suitable for epidemiological analysis. Applications in investigations of salmonellosis among livestock.
The Veterinary quarterly 1993;15(4):125-35.
1993: John Elmerdahl Olsen; J L Larsen
Ribotypes and plasmid contents of Vibrio anguillarum strains in relation to serovar.
Applied and environmental microbiology 1993;59(11):3863-70.
1993: S Aabo; Ole Feldballe Rasmussen; L Rossen; P D Sørensen; John Elmerdahl Olsen
Salmonella identification by the polymerase chain reaction.
Molecular and cellular probes 1993;7(3):171-8.
1992: Dorte Lau Baggesen; John Elmerdahl Olsen; Magne Bisgaard
Plasmid profiles and phage types of Salmonella typhimurium isolated from successive flocks of chickens on three parent stock farms.
Avian pathology : journal of the W.V.P.A 1992;21(4):569-79.
1992: L Dons; Ole Feldballe Rasmussen; John Elmerdahl Olsen
Cloning and characterization of a gene encoding flagellin of Listeria monocytogenes.
Molecular microbiology 1992;6(20):2919-29.
1992: Jens P Christensen; John Elmerdahl Olsen; H C Hansen; Magne Bisgaard
Characterization of Salmonella enterica serovar gallinarum biovars gallinarum and pullorum by plasmid profiling and biochemical analysis.
Avian pathology : journal of the W.V.P.A 1992;21(3):461-70.
1992: S Aabo; A Thomas; M L Hall; H R Smith; John Elmerdahl Olsen
Evaluation of a Salmonella-specific DNA probe by colony hybridization using non-isotopic and isotopic labeling.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1992;100(7):623-8.
1992: John Elmerdahl Olsen; Derek Brown; Dorte Lau Baggesen; Magne Bisgaard
Biochemical and molecular characterization of Salmonella enterica serovar berta, and comparison of methods for typing.
Epidemiology and infection 1992;108(2):243-60.
1992: John Elmerdahl Olsen; M Sørensen; Derek Brown; K Gaarslev; Magne Bisgaard
Plasmid profiles as an epidemiological marker in Salmonella enterica serovar berta infections. Comparison of isolates obtained from humans and poultry.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1992;100(3):221-8.
1991: Bent Aalbaek; J Rasmussen; B Nielsen; John Elmerdahl Olsen
Prevalence of antibiotic-resistant Escherichia coli in Danish pigs and cattle.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1991;99(12):1103-10.
1991: Ole Feldballe Rasmussen; T Beck; John Elmerdahl Olsen; L Dons; L Rossen
Listeria monocytogenes isolates can be classified into two major types according to the sequence of the listeriolysin gene.
Infection and immunity 1991;59(11):3945-51.
1991: L Rossen; K Holmstrøm; John Elmerdahl Olsen; Ole Feldballe Rasmussen
A rapid polymerase chain reaction (PCR)-based assay for the identification of Listeria monocytogenes in food samples.
International journal of food microbiology 1991;14(2):145-51.
1991: J L Larsen; John Elmerdahl Olsen
Occurrence of plasmids in Danish isolates of Vibrio anguillarum serovars O1 and O2 and association of plasmids with phenotypic characteristics.
Applied and environmental microbiology 1991;57(8):2158-63.
1991: John Elmerdahl Olsen; S Aabo; E O Nielsen; B B Nielsen
Isolation of a Salmonella-specific DNA hybridization probe.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1991;99(2):114-20.
1990: John Elmerdahl Olsen; J L Larsen
Restriction fragment length polymorphism of the Vibrio anguillarum serovar O1 virulence plasmid.
Applied and environmental microbiology 1990;56(10):3130-2.
1990: John Elmerdahl Olsen; Dorte Lau Baggesen; B B Nielsen; H E Larsen
The prevalence of plasmids in Danish bovine and human isolates of Salmonella dublin.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1990;98(8):735-40.