Todd J Ward

Summary

Affiliation: Agricultural Research Service
Country: USA

Publications

  1. ncbi request reprint An adaptive evolutionary shift in Fusarium head blight pathogen populations is driving the rapid spread of more toxigenic Fusarium graminearum in North America
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, Agricultural Research Service, United States Department of Agriculture, Peoria, IL 61604, USA
    Fungal Genet Biol 45:473-84. 2008
  2. pmc Multilocus genotyping assays for single nucleotide polymorphism-based subtyping of Listeria monocytogenes isolates
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, USDA, Peoria, IL 61604, USA
    Appl Environ Microbiol 74:7629-42. 2008
  3. ncbi request reprint Molecular and phenotypic characterization of Listeria monocytogenes from U.S. Department of Agriculture Food Safety and Inspection Service surveillance of ready-to-eat foods and processing facilities
    Todd J Ward
    Bacterial Foodborne Pathogens and Mycology Research Unit, U S Department of Agriculture, Agricultural Research Service, Peoria, Illinois 61604, USA
    J Food Prot 73:861-9. 2010
  4. pmc A targeted multilocus genotyping assay for lineage, serogroup, and epidemic clone typing of Listeria monocytogenes
    Todd J Ward
    Bacterial Foodborne Pathogens and Mycology Research Unit, Agricultural Research Service, United States Department of Agriculture, Peoria, IL 61604, USA
    Appl Environ Microbiol 76:6680-4. 2010
  5. pmc A single-nucleotide-polymorphism-based multilocus genotyping assay for subtyping lineage I isolates of Listeria monocytogenes
    Thomas F Ducey
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U S Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA
    Appl Environ Microbiol 73:133-47. 2007
  6. doi request reprint Multilocus genotyping and molecular phylogenetics resolve a novel head blight pathogen within the Fusarium graminearum species complex from Ethiopia
    Kerry O'Donnell
    Microbial Genomics Research Unit, National Center for Agricultural Utilization Research, U S Department of Agriculture, Agricultural Research Service, 1815 N University St, Peoria, IL 61604, USA
    Fungal Genet Biol 45:1514-22. 2008
  7. pmc Intraspecific phylogeny and lineage group identification based on the prfA virulence gene cluster of Listeria monocytogenes
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U S Department of Agriculture, 1815 North University St, Peoria, IL 61604, USA
    J Bacteriol 186:4994-5002. 2004
  8. ncbi request reprint Genealogical concordance between the mating type locus and seven other nuclear genes supports formal recognition of nine phylogenetically distinct species within the Fusarium graminearum clade
    Kerry O'Donnell
    National Center for Agricultural Utilization Research, US Department of Agriculture, Agricultural Research Service, Peoria, IL 61604, USA
    Fungal Genet Biol 41:600-23. 2004
  9. ncbi request reprint Global molecular surveillance reveals novel Fusarium head blight species and trichothecene toxin diversity
    David E Starkey
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, U S Department of Agriculture, Agricultural Research Service, Peoria, IL 61604, USA
    Fungal Genet Biol 44:1191-204. 2007
  10. pmc Evolution of a large ribosomal RNA multigene family in filamentous fungi: birth and death of a concerted evolution paradigm
    Alejandro P Rooney
    Microbial Genomics and Bioprocessing Research Unit, Agricultural Research Service, US Department of Agriculture, Peoria, IL 61604, USA
    Proc Natl Acad Sci U S A 102:5084-9. 2005

Collaborators

Detail Information

Publications20

  1. ncbi request reprint An adaptive evolutionary shift in Fusarium head blight pathogen populations is driving the rapid spread of more toxigenic Fusarium graminearum in North America
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, Agricultural Research Service, United States Department of Agriculture, Peoria, IL 61604, USA
    Fungal Genet Biol 45:473-84. 2008
    ..The discovery of this previously unrecognized pathogen diversity has significant implications for food safety and cereal production in North America...
  2. pmc Multilocus genotyping assays for single nucleotide polymorphism-based subtyping of Listeria monocytogenes isolates
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, USDA, Peoria, IL 61604, USA
    Appl Environ Microbiol 74:7629-42. 2008
    ..These mutations were restricted to serogroup 1/2 isolates, which may explain the overrepresentation of serotype 4b isolates in human listeriosis cases...
  3. ncbi request reprint Molecular and phenotypic characterization of Listeria monocytogenes from U.S. Department of Agriculture Food Safety and Inspection Service surveillance of ready-to-eat foods and processing facilities
    Todd J Ward
    Bacterial Foodborne Pathogens and Mycology Research Unit, U S Department of Agriculture, Agricultural Research Service, Peoria, Illinois 61604, USA
    J Food Prot 73:861-9. 2010
    ..These results indicated that integration of PFGE and DNA sequence-based subtyping provides an improved framework for prediction of relative risk associated with L. monocytogenes strains from RTE foods...
  4. pmc A targeted multilocus genotyping assay for lineage, serogroup, and epidemic clone typing of Listeria monocytogenes
    Todd J Ward
    Bacterial Foodborne Pathogens and Mycology Research Unit, Agricultural Research Service, United States Department of Agriculture, Peoria, IL 61604, USA
    Appl Environ Microbiol 76:6680-4. 2010
    ..The assay was designed to facilitate rapid strain characterization and the integration of subtype data into risk-based inspection programs...
  5. pmc A single-nucleotide-polymorphism-based multilocus genotyping assay for subtyping lineage I isolates of Listeria monocytogenes
    Thomas F Ducey
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U S Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA
    Appl Environ Microbiol 73:133-47. 2007
    ..DNA sequences were deposited in the GenBank database under accession numbers DQ 812146 to DQ 812517, DQ 843664 to DQ 844598, and AY 512391 to AY 512502...
  6. doi request reprint Multilocus genotyping and molecular phylogenetics resolve a novel head blight pathogen within the Fusarium graminearum species complex from Ethiopia
    Kerry O'Donnell
    Microbial Genomics Research Unit, National Center for Agricultural Utilization Research, U S Department of Agriculture, Agricultural Research Service, 1815 N University St, Peoria, IL 61604, USA
    Fungal Genet Biol 45:1514-22. 2008
    ..Herein the FHB pathogen from Ethiopia is formally described as a novel species...
  7. pmc Intraspecific phylogeny and lineage group identification based on the prfA virulence gene cluster of Listeria monocytogenes
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U S Department of Agriculture, 1815 North University St, Peoria, IL 61604, USA
    J Bacteriol 186:4994-5002. 2004
    ..monocytogenes lineages may represent distinct species within the framework of the cohesion species concept...
  8. ncbi request reprint Genealogical concordance between the mating type locus and seven other nuclear genes supports formal recognition of nine phylogenetically distinct species within the Fusarium graminearum clade
    Kerry O'Donnell
    National Center for Agricultural Utilization Research, US Department of Agriculture, Agricultural Research Service, Peoria, IL 61604, USA
    Fungal Genet Biol 41:600-23. 2004
    ..Species rank is formally proposed for the eight unnamed species within the Fg clade using fixed nucleotide characters...
  9. ncbi request reprint Global molecular surveillance reveals novel Fusarium head blight species and trichothecene toxin diversity
    David E Starkey
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, U S Department of Agriculture, Agricultural Research Service, Peoria, IL 61604, USA
    Fungal Genet Biol 44:1191-204. 2007
    ..S. In addition, we describe a highly divergent population of F. graminearum from the Gulf Coast of the U.S., and divergent isolates of F. acaciae-mearnsii from Australia and South Africa...
  10. pmc Evolution of a large ribosomal RNA multigene family in filamentous fungi: birth and death of a concerted evolution paradigm
    Alejandro P Rooney
    Microbial Genomics and Bioprocessing Research Unit, Agricultural Research Service, US Department of Agriculture, Peoria, IL 61604, USA
    Proc Natl Acad Sci U S A 102:5084-9. 2005
    ..As such, we hypothesize that a mechanism resembling retroposition controls 5S rRNA gene amplification, dispersal, and integration in the genomes of filamentous fungi...
  11. doi request reprint Birth-and-death evolution of the internalin multigene family in Listeria
    Alejandro P Rooney
    National Center for Agricultural Utilization Research, Agricultural Research Service, U S Department of Agriculture, 1815 N University Street, Peoria, IL 61604, USA
    Gene 427:124-8. 2008
    ....
  12. ncbi request reprint Birth, death and horizontal transfer of the fumonisin biosynthetic gene cluster during the evolutionary diversification of Fusarium
    Robert H Proctor
    United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL, USA
    Mol Microbiol 90:290-306. 2013
    ..Thus, uniform gene organization within the FUM cluster belies a complex evolutionary history that has not always paralleled the evolution of Fusarium. ..
  13. doi request reprint Phylogenetic analyses of RPB1 and RPB2 support a middle Cretaceous origin for a clade comprising all agriculturally and medically important fusaria
    Kerry O'Donnell
    Bacterial Foodborne Pathogens and Mycology Research Unit, National Center for Agricultural Utilization Research, US Department of Agriculture, Agricultural Research Service, 1815 North University Street, Peoria, IL 61604, USA
    Fungal Genet Biol 52:20-31. 2013
    ..Our results support two competing hypotheses for the circumscription of Fusarium and provide a framework for future comparative phylogenetic and genomic analyses of this agronomically and medically important genus...
  14. pmc Ancestral polymorphism and adaptive evolution in the trichothecene mycotoxin gene cluster of phytopathogenic Fusarium
    Todd J Ward
    Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, U S Department of Agriculture, Agricultural Research Service, 1815 North University Street, Peoria, IL 61604, USA
    Proc Natl Acad Sci U S A 99:9278-83. 2002
    ..Chemotype-specific differences in selective constraint and evidence of adaptive evolution within trichothecene genes are also reported...
  15. pmc Phylogenetic diversity and microsphere array-based genotyping of human pathogenic Fusaria, including isolates from the multistate contact lens-associated U.S. keratitis outbreaks of 2005 and 2006
    Kerry O'Donnell
    Microbial Genomics and Bioprocessing Research Unit, Agricultural Research Service, U S Department of Agriculture, 1815 North University Street, Peoria, IL 61604 3999, USA
    J Clin Microbiol 45:2235-48. 2007
    ..The high degree of phylogenetic diversity represented among the corneal isolates is consistent with multiple sources of contamination...
  16. ncbi request reprint The Fusarium graminearum genome reveals a link between localized polymorphism and pathogen specialization
    Christina A Cuomo
    Broad Institute of the Massachusetts Institute of Technology and Harvard, Cambridge, MA 02142, USA
    Science 317:1400-2. 2007
    ..These regions of genome innovation may result from selection due to interactions of F. graminearum with its plant hosts...
  17. ncbi request reprint The presence of GC-AG introns in Neurospora crassa and other euascomycetes determined from analyses of complete genomes: implications for automated gene prediction
    Martijn Rep
    Plant Pathology, Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, The Netherlands
    Genomics 87:338-47. 2006
    ..These findings have important implications for fungal genome annotation, as the automated annotations of euascomycete genomes incorrectly identified intron boundaries for all of the confirmed and probable GC-AG introns reported here...
  18. pmc Suspension microarray with dendrimer signal amplification allows direct and high-throughput subtyping of Listeria monocytogenes from genomic DNA
    Monica K Borucki
    USDA ARS, Animal Disease Research Unit, Pullman, WA 99164 6630, USA
    J Clin Microbiol 43:3255-9. 2005
    ..The ability to subtype genomic DNA without PCR amplification allows probes to be designed for many different regions within the bacterial genome and should allow high-resolution subtyping not possible with multiplex PCR...
  19. ncbi request reprint The trichothecene biosynthesis gene cluster of Fusarium graminearum F15 contains a limited number of essential pathway genes and expressed non-essential genes
    Makoto Kimura
    Laboratory for Remediation Research, Plant Science Center, RIKEN, 2 1 Hirosawa, Wako, Saitama 351 0198, Japan
    FEBS Lett 539:105-10. 2003
    ..In contrast, recombinant TRI8 protein displayed no C-3 deacetylase activity, suggesting that the loss or alteration of function contribute directly to the chemotype difference...
  20. ncbi request reprint Conservation genomics: disequilibrium mapping of domestic cattle chromosomal segments in North American bison populations
    Natalie D Halbert
    Department of Veterinary Pathobiology, College of Veterinary Medicine and Biochemical Sciences, Texas A and M University, College Station, TX 77843, USA
    Mol Ecol 14:2343-62. 2005
    ....