Roger Johnson

Summary

Affiliation: Public Health Agency of Canada
Country: Canada

Publications

  1. doi request reprint Bacteriophages for prophylaxis and therapy in cattle, poultry and pigs
    R P Johnson
    Public Health Agency of Canada, Laboratory for Foodborne Zoonoses, Guelph, Ontario N1G3W4, Canada
    Anim Health Res Rev 9:201-15. 2008
  2. pmc The genome and proteome of a virulent Escherichia coli O157:H7 bacteriophage closely resembling Salmonella phage Felix O1
    Andre Villegas
    Public Health Agency of Canada, Laboratory for Foodborne Zoonoses, 110 Stone Road West, Guelph, ON, N1G 3W4, Canada
    Virol J 6:41. 2009
  3. pmc Rapid determination of Escherichia coli O157:H7 lineage types and molecular subtypes by using comparative genomic fingerprinting
    Chad Laing
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Lethbridge, Alberta, Canada
    Appl Environ Microbiol 74:6606-15. 2008
  4. pmc Genomic regions conserved in lineage II Escherichia coli O157:H7 strains
    Marina Steele
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Guelph, Ontario, Canada
    Appl Environ Microbiol 75:3271-80. 2009
  5. pmc Genotypic characterization and prevalence of virulence factors among Canadian Escherichia coli O157:H7 strains
    Kim Ziebell
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Guelph, Ontario N1G 3W4, Canada
    Appl Environ Microbiol 74:4314-23. 2008
  6. pmc A comparison of Shiga-toxin 2 bacteriophage from classical enterohemorrhagic Escherichia coli serotypes and the German E. coli O104:H4 outbreak strain
    Chad R Laing
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Lethbridge, Alberta, Canada
    PLoS ONE 7:e37362. 2012
  7. pmc Genome evolution in major Escherichia coli O157:H7 lineages
    Yongxiang Zhang
    Laboratory for Foodborne Zoonoses, Health Canada, Lethbridge, AB, Canada
    BMC Genomics 8:121. 2007
  8. pmc Probiotics affect virulence-related gene expression in Escherichia coli O157:H7
    Maira Jessica Medellin-Peña
    Department of Food Science, University of Guelph, Guelph, Ontario, Canada
    Appl Environ Microbiol 73:4259-67. 2007
  9. doi request reprint Prevalence of Salmonella infecting bacteriophages associated with Ontario pig farms and the holding area of a high capacity pork processing facility
    Sunan Wang
    Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada
    J Sci Food Agric 90:2318-25. 2010
  10. pmc Identification of Escherichia coli O157:H7 genomic regions conserved in strains with a genotype associated with human infection
    Marina Steele
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, 1st Floor, C F I A Building, Lethbridge, AB T1J 3Z4, Canada
    Appl Environ Microbiol 73:22-31. 2007

Collaborators

  • Yongxiang Zhang
  • Eduardo N Taboada
  • Vanessa Allen
  • Chad R Laing
  • A M Donoghue
  • Matthew W Gilmour
  • N C Rath
  • Marina Steele
  • Kim Ziebell
  • Victor Gannon
  • Andrew Benson
  • Sunan Wang
  • Andre Villegas
  • Maira Jessica Medellin-Peña
  • Keith Warriner
  • Weikang Zhao
  • Asad Raza
  • Magdalena Kostrzynska
  • Robert Friendship
  • Andrew M Kropinski
  • Yi Min She
  • Erika J Lingohr
  • Amanda Mazzocco
  • Rafiq Ahmed
  • Thomas E Waddell
  • Shivani Ojha
  • Dianne M Moyles
  • Hans Wolfgang Ackermann
  • Bruce Ciebin
  • Scott McEwen
  • Paulina Konczy
  • Haifeng Wang
  • Mansel W Griffiths
  • Sanjeev Anand

Detail Information

Publications10

  1. doi request reprint Bacteriophages for prophylaxis and therapy in cattle, poultry and pigs
    R P Johnson
    Public Health Agency of Canada, Laboratory for Foodborne Zoonoses, Guelph, Ontario N1G3W4, Canada
    Anim Health Res Rev 9:201-15. 2008
    ..In the event that the potential of phage therapy is realized, adoption will depend on its efficacy and complementarity relative to other interventions. Another potential challenge will be regulatory approval...
  2. pmc The genome and proteome of a virulent Escherichia coli O157:H7 bacteriophage closely resembling Salmonella phage Felix O1
    Andre Villegas
    Public Health Agency of Canada, Laboratory for Foodborne Zoonoses, 110 Stone Road West, Guelph, ON, N1G 3W4, Canada
    Virol J 6:41. 2009
    ....
  3. pmc Rapid determination of Escherichia coli O157:H7 lineage types and molecular subtypes by using comparative genomic fingerprinting
    Chad Laing
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Lethbridge, Alberta, Canada
    Appl Environ Microbiol 74:6606-15. 2008
    ..coli O157:H7 lineages and PT. As a comparative genomics typing method that is amenable for use in high-throughput platforms, CGF may be a valuable tool in outbreak investigations and strain characterization...
  4. pmc Genomic regions conserved in lineage II Escherichia coli O157:H7 strains
    Marina Steele
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Guelph, Ontario, Canada
    Appl Environ Microbiol 75:3271-80. 2009
    ..These lineage II-related loci were also shown to be useful markers for genotyping of E. coli O157:H7 strains isolated from human and animal sources...
  5. pmc Genotypic characterization and prevalence of virulence factors among Canadian Escherichia coli O157:H7 strains
    Kim Ziebell
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Guelph, Ontario N1G 3W4, Canada
    Appl Environ Microbiol 74:4314-23. 2008
    ..1% versus 0.9%) than were LSPA6-LI strains. The LSPA6 genotype- and PT-related characteristics identified may be important markers of specific ecotypes of E. coli O157:H7 that have unique epidemiological and virulence characteristics...
  6. pmc A comparison of Shiga-toxin 2 bacteriophage from classical enterohemorrhagic Escherichia coli serotypes and the German E. coli O104:H4 outbreak strain
    Chad R Laing
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Lethbridge, Alberta, Canada
    PLoS ONE 7:e37362. 2012
    ..Further studies are required to determine whether the elevated Stx2-production levels are due to bacteriophage or E. coli O104:H4 host related factors...
  7. pmc Genome evolution in major Escherichia coli O157:H7 lineages
    Yongxiang Zhang
    Laboratory for Foodborne Zoonoses, Health Canada, Lethbridge, AB, Canada
    BMC Genomics 8:121. 2007
    ..coli O157:H7 strains that belong to various phage types (PTs) and different lineage-specific polymorphism assay (LSPA) types...
  8. pmc Probiotics affect virulence-related gene expression in Escherichia coli O157:H7
    Maira Jessica Medellin-Peña
    Department of Food Science, University of Guelph, Guelph, Ontario, Canada
    Appl Environ Microbiol 73:4259-67. 2007
    ..acidophilus La-5 secretes a molecule(s) that either acts as a QS signal inhibitor or directly interacts with bacterial transcriptional regulators, controlling the transcription of EHEC O157 genes involved in colonization...
  9. doi request reprint Prevalence of Salmonella infecting bacteriophages associated with Ontario pig farms and the holding area of a high capacity pork processing facility
    Sunan Wang
    Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada
    J Sci Food Agric 90:2318-25. 2010
    ..The following reports on the prevalence of Salmonella infecting bacteriophages within Ontario pig farms and associated with the holding area of a pork slaughterhouse...
  10. pmc Identification of Escherichia coli O157:H7 genomic regions conserved in strains with a genotype associated with human infection
    Marina Steele
    Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, 1st Floor, C F I A Building, Lethbridge, AB T1J 3Z4, Canada
    Appl Environ Microbiol 73:22-31. 2007
    ..Cluster analysis based on lineage I conserved regions showed that the presence/absence of these regions was congruent with the inferred phylogeny of the strains...