Narjol González-Escalona

Summary

Affiliation: Food and Drug Administration
Country: USA

Publications

  1. pmc Prevalence, distribution and evolutionary significance of the IS629 insertion element in the stepwise emergence of Escherichia coli O157:H7
    Lydia V Rump
    Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740, USA
    BMC Microbiol 11:133. 2011
  2. pmc Detection of live Salmonella sp. cells in produce by a TaqMan-based quantitative reverse transcriptase real-time PCR targeting invA mRNA
    Narjol González-Escalona
    Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, Maryland 20740, USA
    Appl Environ Microbiol 75:3714-20. 2009
  3. pmc Comparison of commercial RNA extraction kits for preparation of DNA-free total RNA from Salmonella cells
    Lydia V Rump
    Center for Food Safety and Applied Nutrition, Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740, USA
    BMC Res Notes 3:211. 2010
  4. pmc Genome sequence of the clinical O4:K12 serotype Vibrio parahaemolyticus strain 10329
    N González-Escalona
    Center for Food Safety and Applied Nutrition, Food andDrug Administration, College Park, MD 20740, USA
    J Bacteriol 193:3405-6. 2011
  5. pmc Different IS629 transposition frequencies exhibited by Escherichia coli O157:H7 strains in the stepwise evolutionary model
    Lydia V Rump
    Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740, USA
    Appl Environ Microbiol 77:5030-3. 2011
  6. doi request reprint Phylogenetic evaluation of the 'Typhimurium' complex of Salmonella strains using a seven-gene multi-locus sequence analysis
    Rebecca L Bell
    Division of Microbiology, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
    Infect Genet Evol 11:83-91. 2011
  7. pmc Comparison of real-time PCR, reverse transcriptase real-time PCR, loop-mediated isothermal amplification, and the FDA conventional microbiological method for the detection of Salmonella spp. in produce
    Guodong Zhang
    Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
    Appl Environ Microbiol 77:6495-501. 2011
  8. pmc Draft genome sequences of six Escherichia coli isolates from the stepwise model of emergence of Escherichia coli O157:H7
    L V Rump
    Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740 USA
    J Bacteriol 193:2058-9. 2011

Collaborators

  • Thomas S Hammack
  • Lydia V Rump
  • L V Rump
  • Markus Fischer
  • Rebecca L Bell
  • Eric W Brown
  • Guodong Zhang
  • Robert Stones
  • E W Brown
  • M Fischer
  • M W Allard
  • G Cao
  • E A Strain
  • Benedicta Asamoah

Detail Information

Publications8

  1. pmc Prevalence, distribution and evolutionary significance of the IS629 insertion element in the stepwise emergence of Escherichia coli O157:H7
    Lydia V Rump
    Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740, USA
    BMC Microbiol 11:133. 2011
    ..It was recently shown that the lack of O157 antigen expression in two O rough E. coli O157:H7 strains was due to IS629 insertions at 2 different locations in the gne gene that is essential for the O antigen biosynthesis...
  2. pmc Detection of live Salmonella sp. cells in produce by a TaqMan-based quantitative reverse transcriptase real-time PCR targeting invA mRNA
    Narjol González-Escalona
    Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, Maryland 20740, USA
    Appl Environ Microbiol 75:3714-20. 2009
    ..This assay allows for the fast and accurate detection of viable Salmonella spp. in spinach, tomatoes, and in both jalapeno and serrano peppers...
  3. pmc Comparison of commercial RNA extraction kits for preparation of DNA-free total RNA from Salmonella cells
    Lydia V Rump
    Center for Food Safety and Applied Nutrition, Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740, USA
    BMC Res Notes 3:211. 2010
    ..The assay of this specific mRNA can be used to indicate the presence of live, as opposed to dead, cells of Salmonella enterica in a food matrix...
  4. pmc Genome sequence of the clinical O4:K12 serotype Vibrio parahaemolyticus strain 10329
    N González-Escalona
    Center for Food Safety and Applied Nutrition, Food andDrug Administration, College Park, MD 20740, USA
    J Bacteriol 193:3405-6. 2011
    ..It contains the virulence determinants tdh and trh but appears to infect at much lower doses than V. parahaemolyticus strains with these same determinants from other areas, such as the U.S. Gulf and Atlantic coasts...
  5. pmc Different IS629 transposition frequencies exhibited by Escherichia coli O157:H7 strains in the stepwise evolutionary model
    Lydia V Rump
    Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740, USA
    Appl Environ Microbiol 77:5030-3. 2011
    ..Although O157:H- is deficient in IS629, it permits IS629 transposition, with an excision frequency higher than that of ancestral O55:H7 strains but significantly lower than that of pathogenic O157:H7 strains...
  6. doi request reprint Phylogenetic evaluation of the 'Typhimurium' complex of Salmonella strains using a seven-gene multi-locus sequence analysis
    Rebecca L Bell
    Division of Microbiology, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
    Infect Genet Evol 11:83-91. 2011
    ..These findings point to important differences among phylogenetic contributions made by the individual genes comprising this MLST dataset...
  7. pmc Comparison of real-time PCR, reverse transcriptase real-time PCR, loop-mediated isothermal amplification, and the FDA conventional microbiological method for the detection of Salmonella spp. in produce
    Guodong Zhang
    Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
    Appl Environ Microbiol 77:6495-501. 2011
    ..Compared to the conventional culture method, the qPCR, RT-qPCR, and LAMP assays allowed faster and equally accurate detection of Salmonella spp. in six high-risk produce commodities...
  8. pmc Draft genome sequences of six Escherichia coli isolates from the stepwise model of emergence of Escherichia coli O157:H7
    L V Rump
    Division of Microbiology, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740 USA
    J Bacteriol 193:2058-9. 2011
    ....