John Elmerdahl Olsen

Search results

• 2004

  Role of flagellin and the two-component cheA/cheY system of Listeria monocytogenes in host cell invasion and virulence

  Dons, L., Eriksson, E., Jin, Y., Rottenberg, M. E., Kristensson, K., Larsen, C. N., Bresciani, J. & Olsen, J. E., 2004, In: Infection and Immunity. 72, 6, p. 3237-3244 8 p.

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

  121 Citations (Scopus)
• 2003

  A manual of basic tools in bioinformatics

  Christensen, H. & Olsen, J. E., 2003, 35 p.

  Research output: Book/Report › Compendium/lecture notes

• A manual of basic tools in bioinformatics

  Christensen, H. & Olsen, J. E., 2003. 34 p.

  Research output: Contribution to conference › Paper › Research

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

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

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

  68 Citations (Scopus)

• Bacterial resistance to antimicrocials in a practical perspective

  Olsen, J. E. & Mrenoski, S., 2003. 7 p.

  Research output: Contribution to conference › Paper › Research

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

  Olsen, J. E., Chadfield, M. S., Aabo, S., Brown, D. J. & Christensen, J. P., 2003, ASM Conferences. American Society of Microbiology, p. 22 1 p.

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

• 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, J. P. & Olsen, J. E., 2003, In: Veterinary Microbiology. 92, 2003, p. 49-64 15 p.

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

  65 Citations (Scopus)

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

  Olsen, J. E., 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
  74 Citations (Scopus)

• 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, J. E., 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

• Detection and diagnosis of infective bovine mastitis

  Mrenoski, S. & Olsen, J. E., 2003. 10 p.

  Research output: Contribution to conference › Paper › Research

• Detection of gallibacterium spp. in chickens by fluorescent 16s in situ hybridizatuib

  Bojesen, A. M., Christensen, H., Nielsen, O. L., Olsen, J. E. & Bisgaard, M., 2003. 1 p.

  Research output: Contribution to conference › Paper › Research

• Detection of Gallibacterium spp. in Chickens by Fluorescent 16S rRNA In Situ Hybridization

  Bojesen, A. M., Christensen, H., Nielsen, O. L., Olsen, J. E. & Bisgaard, M., 2003, In: Journal of Clinical Microbiology. VOl 41, No. 11, 11, p. 5167-5172 6 p.

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

  28 Citations (Scopus)

• Genetic Diversity of Gallibacterium anatis Isolates from Different Chicken Flocks

  Bojesen, A. M., Thorpdahl, M., Christensen, H. & Olsen, J. E., 2003, In: Journal of Clinical Microbiology. June, p. 2737-2740, 6, p. 2737-2740 4 p.

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

  59 Citations (Scopus)

• Genetic relationship 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 with Gallibacterium gen. nov

  Christensen, H., Bisgaard, M., Bojesen, A. M., Mutters, R. & Olsen, J. E., Jan 2003, In: International Journal of Systematic and Evolutionary Microbiology. 53, 1, p. 275-287 13 p.

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

  Open Access
  140 Citations (Scopus)

• Genetic relationships among avian isolates classified as Pasteurella haemolytica, "Actinobacillus salpingitidis" or Pasteurella anatis with proposal of Gallibacterium anatis gen. nov., comb. nov. and discription of additional genomospecies within Gallibacterium gen. nov.

  Christensen, H., Bisgaard, M., Bojesen, A. M., Mutters, R. ;. & Olsen, J. E., 2003, In: Int. Journal of Systemtic and Evolutionary Microbiology. (2003) 53, p. 275-287 13 p.

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

• Link between stress adaptation and virulence of Salmonella Dublin and S. Typhimurium.

  Thomsen, L. E., Olsen, J. E., Chadfield, M. S. & Ingmer, H., 2003, Meeting of WG of COST920. 1 ed. Veterinary Medical Research Institute of the Hungarian Academy of Sciences, p. 22 1 p.

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

• Marketing of free range local chickens in Morogora and Kilosa urban markets, Tanzania.

  Mlozi, M. R. S., Kakengi, A. V. M., Minga, U. M., mtambo, A. M. & Olsen, J. E., 2003, In: Livestock Research for Rural Development. (2) 2003, p. 1 12 p.

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

• Marketing of free range local chickens in Morogoro and Kilosa urban markets, Tanzania

  Mlozi, M. R. S., Kakengi, A. V. M., Minga, U. M., Mtambo, A. M. & Olsen, J. E., Feb 2003, In: Livestock Research for Rural Development. 15, 2

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

  30 Citations (Scopus)

• Marketingof fress range local chickens in Morogora and Kilosa urban markets, Taqnzania

  Mlozi, M. R. S., Kakengi, U. M., Minga, A. M., Mtambo, A. M. & Olsen, J. E., 2003, 15 ed. 12 p.

  Research output: Book/Report › Ph.D. thesis

• Of Hemophilus paragallinarum,Hemophilus somnus, Mannheimia (Pasteurella hemolytica, MannHeimia spp., Pasteurella trehalosi, and Pasteurella multocida.

  Larsen, J., Christensen, H., Bisgaard, M. & Olsen, J. E., 2003, Methods in Molecular Biology. p. 216. 27 p.

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

• Phages types and antimicrobial resistande among Danish bovine Staphylococcus aureua isolates since the 1950s

  Vintov, J., Aarestrup, F. M., Zinn, C. E. & Olsen, J. E., 2003, In: Veterinary Microbiology. 97, p. 63 10 p.

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

  10 Citations (Scopus)

• Phylogenetic analysis by 16S rDNA gene sequence comparison of avian taxa of Bisgaard and characterization and description of two new taxa of Pasteurellaceae

  Christensen, H., Foster, G., Christensen, J. P., Pennycott, T., Olsen, J. E. & Bisgaard, M., 2003, In: Journal of Applied Microbiology. 95, 2, p. 354-363 9 p.

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

  52 Citations (Scopus)

• Reduced amounts of LPS affect both stress tolerance and virulence of Salmonella enterica serovar Dublin.

  Thomsen, L. E., Chadfield, M. S., Bispham, J. ,., Wallis, T. S. ,., Olsen, J. E. & Ingmer, H., 2003, In: FEMS Microbiology Letters. 228, 2, p. 225-231 7 p.

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

  34 Citations (Scopus)

• Salmonella typhimurium invades multiple epithelial cell types in pig jejunum

  Schauser, K., Olsen, J. E. & Larsson, L.-I., 2003, ASM Conferences. American Society of Microbiology, p. 89 1 p.

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

• The role of flagella and shemotaxis on virulence of salmonella enterica serotypes typhimurium and Dublin

  Chadfield, M. S., Høegh-Andersen, K. H., Aabo, S., Christensen, J. P. & Olsen, J. E., 2003. 1 p.

  Research output: Contribution to conference › Paper › Research
• 2002

  Characterisation of attenuated crp mutants of Salmonella enterica biotype gallinarum

  Chadfield, M. S., Rosu, V., Santona, A., Rubino, S. & Olsen, J. E., 2002. 2 p.

  Research output: Contribution to conference › Paper › Research

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

  Thomsen, L. E., Olsen, J. E., Foster, J. W. & Ingmer, H., 2002, In: Microbiology. 148, p. 2727-2733 7 p.

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

  58 Citations (Scopus)

• 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, J. E., 2002, In: Tropical Animal Health and Production. 34, 3, p. 195-204 10 p.

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

  15 Citations (Scopus)

• 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, J. E., 2002, In: Propical Animal Health and Production. 34, p. 195-204 10 p.

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

• Detection of gallibacterium (Pasteurella anatis, [Actinobacillus] salpingtidis and [P.] haemolytica-like organisms) in chickens by fluorescent 16S rRNA in situ hybridization

  Bojesen, A. M., Christensen, H., Bisgaard, M., Nielsen, O. L. & Olsen, J. E., 2002, Abstract. 89 ed. p. 77 1 p.

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

• Differences in the ability of Salmonella typhimurium strains to utilize the serotype associated virulence plasmid

  Olsen, J. E., Thomsen, L. E., Brown, D. J. & Chadfield, M. S., 2002. 2 p.

  Research output: Contribution to conference › Paper › Research

• Distribution of the leukotoxin gene (1ktA) in Mannheimia species isolated from different animal hosts

  Larsen, J., Christensen, H., Bisgaard, M. & Olsen, J. E., 2002, Abstract. 91 ed. p. 77-78 2 p.

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

• Final classification of Bisgaard taxon 9 as Actinobacillus arthritidis sp. nov. and recognition of a novel genomospecies for equine strains of Actinobacillus lignieresii

  Christensen, H., Bisgaard, M., Angen, Ø. & Olsen, J. E., 2002, In: International Journal of Systematic and Evolutionary Microbiology. 52, p. 1239-1246 8 p.

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

  52 Citations (Scopus)

• Genomic diversity of Gallibacterium anatis in chicken flocks representing different production systems

  Bojesen, A. M., Thorpdahl, M., Christensen, H., Olsen, J. E. & Bisgaard, M., 2002, Abstract. 90 ed. p. 77 1 p.

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

• Genotypical homogeneity among phenotypic variants of Pasteurella multocida, biovars 2 or P. canis and P. avium and isolates misclassified as P. anatis

  Christensen, H., Olsen, J. E. & Bisgaard, M., 2002, Abstract. 19 ed. p. 29 1 p.

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

• Genotypic heterogeneity of Pasteurella gallinarum as shown by ribotyping and 16S rRNA sequencing

  Christensen, H., Dziva, F., Olsen, J. E. & Bisgaard, M., 2002, In: Avian Pathology. 31, p. 603-610 8 p.

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

  12 Citations (Scopus)

• Nutrient status of crop contents of rural scavenging local chickens in Tanzania

  Mwalusanya, N. A., Katule, A. M., Mutayoba, S. K., Minga, U. M., Mtambo, M. M. A. & Olsen, J. E., 2002, In: British Poultry Science. 43, 1, p. 64-69 6 p.

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

  34 Citations (Scopus)

• PCR detection of [haemophilus] paragallinarum, [H] somnus, Mannheimia (Pasteurella) haemolytica, Mannheimia spp., [P.] trehalosi, and Pasteurella multocida

  Christensen, H., Bisgaard, M., Larsen, J. & Olsen, J. E., 2002, PCR detection of microbial pathogens : methods and protocols. Sachse, K. & Frey, J. (eds.). Humana Press, p. 257-274 18 p.

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

• Prevalence and clonal diversity of Actinobacillus salpingtidis/Pasteurella haemolytica-like bacteria in chickens from different production systems

  Bojesen, A. M., Thorpdahl, M., Christensen, H., Olsen, J. E. & Bisgaard, M., 2002. 1 p.

  Research output: Contribution to conference › Paper › Research

• Productivity and natural disease resistance potential of free-ranging local chicken ecotypes in Tanzania

  Msoffe, P. L. M., Mtambo, M. M. A., Minga, U. M., Gwakisa, P. S., Mdegela, R. H. & Olsen, J. E., 2002, In: Livestock Research for Rural Development. 14, 3, 12 p.

  Research output: Contribution to journal › Journal article › Research

  34 Citations (Scopus)

• Quantitative comparison of intestinal invasion of zoonotic serotypes of Salmonella enterica in poultry

  Aabo, S., Christensen, J. P., Chadfield, M. S., Carstensen, B., Olsen, J. E. & Bisgaard, M., 2002, In: Avian Pathology. 31, 1, p. 41-47 7 p.

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

  33 Citations (Scopus)

• Quantitative investigations of in vivo invasion of Pasteurella multocida using a chicken intestinal loop model

  Christensen, J. P., Bojesen, A. M., Jensen, T. K., Bisgaard, M., Nielsen, O. L. & Olsen, J. E., 2002, Abstract. 21 ed. p. 30 1 p.

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

• Reclassification of Bisgaard taxon 33 with proposal of Avibacterium amazonae gen. nov., sp. nov. as a new member of pasteurellaceae

  Christensen, H., Aalbæk, B., Bisgaard, M. & Olsen, J. E., 2002, Abstract. 16 ed. p. 29 1 p.

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

• 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.

  Christensen, H., Bisgaard, M. & Olsen, J. E., 2002, In: International Journal of Systematic and Evolutionary Microbiology. 52, p. 1569-1576 8 p.

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

  48 Citations (Scopus)

• Revised phylogeny of pasteurellaceae by 16S rRNA and house-keeping gene sequence analysis and impact on host association

  Christensen, H. M., Bisgaard, M. & Olsen, J. E., 2002, Abstract. 17 ed. p. 28 1 p.

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

• Revised phylogeny of pasteurellaceae by 16S rRNA and house-keeping gene sequence comparisons

  Christensen, H., Bisgaard, M. & Olsen, J. E., 2002.

  Research output: Contribution to conference › Paper › Research

• Taxonomic changes within Actinobacillus sensu stricto

  Bisgaard, M., Christensen, H. & Olsen, J. E., 2002, Abstract. 18 ed. p. 29 1 p.

  Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research
• 2001

  Bakteriel resistens overfor desinfektionsmidler

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

  Research output: Contribution to journal › Journal article › Research

• 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, J. E., 2001, In: FEMS Microbiology Ecology. 38, p. 77-80 4 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  49 Citations (Scopus)

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

  Christensen, J. P., Aabo, S., Chadfield, M. S., Cartensen, N., Olsen, J. E. & Bisgaard, M., 2001. 1 p.

  Research output: Contribution to conference › Paper › Research