Thomas Oscar

Summary

Affiliation: University of Maryland Eastern Shore
Country: USA

Publications

  1. ncbi request reprint Simulation model for enumeration of Salmonella on chicken as a function of PCR detection time score and sample size: implications for risk assessment
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Room 2111, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 67:1201-8. 2004
  2. ncbi request reprint Dose-response model for 13 strains of salmonella
    Thomas Oscar
    Microbial Food Safety Research Unit, Agriculture Research Service, US Department of Agriculture, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
    Risk Anal 24:41-9. 2004
  3. ncbi request reprint Development and validation of primary, secondary, and tertiary models for growth of Salmonella Typhimurium on sterile chicken
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 68:2606-13. 2005
  4. ncbi request reprint Transformation of Escherichia coli K-12 with a high-copy plasmid encoding the green fluorescent protein reduces growth: implications for predictive microbiology
    T P Oscar
    US Department of Agriculture, Agricultural Research Service, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne 21853, USA
    J Food Prot 69:276-81. 2006
  5. ncbi request reprint Validation of a tertiary model for predicting variation of Salmonella typhimurium DT104 (ATCC 700408) growth from a low initial density on ground chicken breast meat with a competitive microflora
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Microbial Food Safety Research Unit, Room 2111, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 69:2048-57. 2006
  6. ncbi request reprint Predictive models for growth of Salmonella typhimurium DT104 from low and high initial density on ground chicken with a natural microflora
    T P Oscar
    Microbial Food Safety Research Unit, Agricultural Research Service, USDA, Room 2111, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
    Food Microbiol 24:640-51. 2007
  7. ncbi request reprint A quantitative risk assessment model for Salmonella and whole chickens
    Thomas P Oscar
    Microbial Food Safety Research Unit, Agricultural Research Service, United States Department of Agriculture, University of Maryland Eastern Shore, 1124 Trigg Hall, Princess Anne, MD 21853, USA
    Int J Food Microbiol 93:231-47. 2004
  8. ncbi request reprint An approach for mapping the number and distribution of Salmonella contamination on the poultry carcass
    T P Oscar
    U S D A, Agricultural Research Service, Microbial Food Safety Research Unit and Agricultural Research Service, 1890 Center of Excellence in Poultry Food Safety Research, U Md Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 71:1785-90. 2008
  9. ncbi request reprint Development and validation of a stochastic model for predicting the growth of Salmonella typhimurium DT104 from a low initial density on chicken frankfurters with native microflora
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Microbial Food Safety Research Unit, Maryland 21853, USA
    J Food Prot 71:1135-44. 2008
  10. ncbi request reprint Predictive model for survival and growth of Salmonella typhimurium DT104 on chicken skin during temperature abuse
    T P Oscar
    USDA, Agricultural Res Serv, Microbial Food Safety Research Unit and USDA 1890, Center for Food Science and Technol, Univ of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 72:304-14. 2009

Collaborators

Detail Information

Publications21

  1. ncbi request reprint Simulation model for enumeration of Salmonella on chicken as a function of PCR detection time score and sample size: implications for risk assessment
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Room 2111, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 67:1201-8. 2004
    ....
  2. ncbi request reprint Dose-response model for 13 strains of salmonella
    Thomas Oscar
    Microbial Food Safety Research Unit, Agriculture Research Service, US Department of Agriculture, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
    Risk Anal 24:41-9. 2004
    ..Thus, the sigmoid shape of dose-response curves in feeding trials with one strain of Salmonella may not accurately reflect dose response in naturally contaminated food where multiple strains may be present...
  3. ncbi request reprint Development and validation of primary, secondary, and tertiary models for growth of Salmonella Typhimurium on sterile chicken
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 68:2606-13. 2005
    ..Because Salmonella concentrations on chicken are closer to 10(0.8) than 10(4.8) CFU/g, the tertiary model should not be used to help assess chicken safety...
  4. ncbi request reprint Transformation of Escherichia coli K-12 with a high-copy plasmid encoding the green fluorescent protein reduces growth: implications for predictive microbiology
    T P Oscar
    US Department of Agriculture, Agricultural Research Service, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne 21853, USA
    J Food Prot 69:276-81. 2006
    ..Thus, use of a low-copy plasmid or insertion of gfp into the chromosome may be required to construct valid strains for development of predictive models for growth of pathogens on naturally contaminated food...
  5. ncbi request reprint Validation of a tertiary model for predicting variation of Salmonella typhimurium DT104 (ATCC 700408) growth from a low initial density on ground chicken breast meat with a competitive microflora
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Microbial Food Safety Research Unit, Room 2111, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 69:2048-57. 2006
    ....
  6. ncbi request reprint Predictive models for growth of Salmonella typhimurium DT104 from low and high initial density on ground chicken with a natural microflora
    T P Oscar
    Microbial Food Safety Research Unit, Agricultural Research Service, USDA, Room 2111, Center for Food Science and Technology, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
    Food Microbiol 24:640-51. 2007
    ..typhimurium DT104 on ground chicken with a natural microflora...
  7. ncbi request reprint A quantitative risk assessment model for Salmonella and whole chickens
    Thomas P Oscar
    Microbial Food Safety Research Unit, Agricultural Research Service, United States Department of Agriculture, University of Maryland Eastern Shore, 1124 Trigg Hall, Princess Anne, MD 21853, USA
    Int J Food Microbiol 93:231-47. 2004
    ....
  8. ncbi request reprint An approach for mapping the number and distribution of Salmonella contamination on the poultry carcass
    T P Oscar
    U S D A, Agricultural Research Service, Microbial Food Safety Research Unit and Agricultural Research Service, 1890 Center of Excellence in Poultry Food Safety Research, U Md Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 71:1785-90. 2008
    ....
  9. ncbi request reprint Development and validation of a stochastic model for predicting the growth of Salmonella typhimurium DT104 from a low initial density on chicken frankfurters with native microflora
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Microbial Food Safety Research Unit, Maryland 21853, USA
    J Food Prot 71:1135-44. 2008
    ..Based on this performance evaluation, the tertiary model was considered acceptable and valid for stochastic predictions of Salmonella Typhimurium DT104 growth from a low initial density on chicken frankfurters with native microflora...
  10. ncbi request reprint Predictive model for survival and growth of Salmonella typhimurium DT104 on chicken skin during temperature abuse
    T P Oscar
    USDA, Agricultural Res Serv, Microbial Food Safety Research Unit and USDA 1890, Center for Food Science and Technol, Univ of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 72:304-14. 2009
    ..Thus, it was concluded that the tertiary model provided valid predictions for survival and growth of Salmonella Typhimurium DT104 from a low initial dose on both nonkosher and kosher chicken skin with native flora...
  11. ncbi request reprint Qualitative map of Salmonella contamination on young chicken carcasses
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Microbial Food Safety Research Unit, University of Maryland, Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 73:1596-603. 2010
    ..Thus, whole-carcass incubation succeeded by characterization of multiple isolates per carcass is needed to properly assess and manage this risk to public health...
  12. ncbi request reprint Development of predictive models for the survival of Campylobacter jejuni (ATCC 43051) on cooked chicken breast patties and in broth as a function of temperature
    K S Yoon
    Department of Human Ecology, 2103 Trigg Hall, Backbone Road, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 67:64-70. 2004
    ..jejuni found on contaminated poultry products has the potential to survive under conditions that are not permissive for growth and thus could cause foodborne illness if the poultry is not sufficiently cooked...
  13. ncbi request reprint Comparison of predictive models for growth of parent and green fluorescent protein-producing strains of Salmonella
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Microbial Food Safety Research Unit, 1124 Trigg Hall, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 66:200-7. 2003
    ....
  14. ncbi request reprint Response surface models for effects of temperature, pH, and previous growth pH on growth kinetics of Salmonella Typhimurium in brain heart infusion broth
    T P Oscar
    United States Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, University of Maryland Eastern Shore, Princess Anne 21853, USA
    J Food Prot 62:106-11. 1999
    ..7 to 8.6) investigated did not alter the subsequent growth kinetics of Salmonella Typhimurium in BHIB...
  15. ncbi request reprint Response surface models for effects of temperature and previous growth sodium chloride on growth kinetics of Salmonella typhimurium on cooked chicken breast
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Microbial Food Safety Research Unit, University of Maryland Eastern Shore, Princess Anne 21853 USA
    J Food Prot 62:1470-4. 1999
    ..Thus, inclusion of previous growth NaCl in predictive models may not significantly improve our ability to predict growth of Salmonella spp. on food subjected to temperature abuse...
  16. ncbi request reprint Response surface models for effects of temperature and previous temperature on lag time and specific growth rate of Salmonella Typhimurium on cooked ground chicken breast
    T P Oscar
    U S Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, University of Maryland Eastern Shore, Princess Anne 21853, USA
    J Food Prot 62:1111-4. 1999
    ..In addition, pretemperature (16 to 34 degrees C) is not a major factor affecting growth of Salmonella Typhimurium...
  17. ncbi request reprint Survival and growth of Listeria monocytogenes in broth as a function of temperature, pH, and potassium lactate and sodium diacetate concentrations
    K A Abou-Zeid
    Center for Food Science and Technology and, U S Department of Agriculture, Agricultural Research Service, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 70:2620-5. 2007
    ..These results suggest that 1.8% of lactate-diacetate mixture can be used as a substantial hurdle to the growth of L. monocytogenes when refrigerated temperatures are maintained for products with pH less than 6.5...
  18. ncbi request reprint Identification and characterization of Salmonella isolates by automated ribotyping
    T P Oscar
    U S Department of Agriculture, University of Maryland Eastern Shore, Princess Anne 21853, USA
    J Food Prot 61:519-24. 1998
    ..However, when results of both typing methods were combined, 40 types of Salmonella were detected, indicating that the best discrimination was obtained when automated ribotyping and serotyping were used together...
  19. ncbi request reprint Growth kinetics of Salmonella isolates in a laboratory medium as affected by isolate and holding temperature
    T P Oscar
    United States Department of Agriculture, University of Maryland Easter Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 61:964-8. 1998
    ..Similar to the results obtained in Experiment 1, identity of the isolate had only minor effects on growth kinetics in Experiment 2 indicating that all isolates examined were suitable for modeling experiments...
  20. ncbi request reprint Prevalence and antimicrobial resistance of Salmonella recovered from processed poultry
    Salina Parveen
    Food Science and Technology Program, Department of Agriculture, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA
    J Food Prot 70:2466-72. 2007
    ..2%), and sulfisoxazole (21.8%). These results indicate the high prevalence of Salmonella contamination in whole broiler carcasses, and a large number of these Salmonella isolates were resistant to commonly used antimicrobials...
  21. ncbi request reprint Development and validation of a tertiary simulation model for predicting the potential growth of Salmonella typhimurium on cooked chicken
    Thomas P Oscar
    Agricultural Research Service, United States Department of Agriculture, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
    Int J Food Microbiol 76:177-90. 2002
    ..The outputs of the tertiary model were validated (prediction bias of -4% for lambda and 1% for mu and prediction accuracy of 10% for lambda and 8% for mu) and integrated with a previously developed risk assessment model for Salmonella...