All Stories

  1. Twenty-four month longitudinal study suggests little to no horizontal gene transfer in situ between third-generation cephalosporin-resistant Salmonella and third-generation cephalosporin-resistant Escherichia coli in a beef cattle feedyard

    Article • Journal of Food Protection, November 2021, International Association for Food Protection

    Dr John W. Schmidt

  2. Antimicrobial resistance in United States retail ground beef with and without label claims regarding antibiotic use

    Article • Journal of Food Protection, December 2020, International Association for Food Protection

    Dr John W. Schmidt

  3. Antimicrobial Resistance at Two United States Cull Cow Processing Establishments

    Article • Journal of Food Protection, July 2020, International Association for Food Protection

    Dr John W. Schmidt

  4. In-Feed Tylosin Phosphate Administration to Feedlot Cattle Minimally Affects Antimicrobial Resistance

    Article • Journal of Food Protection, January 2020, International Association for Food Protection

    Dr John W. Schmidt

  5. Food Service Pork Chops from Three U.S. Regions Harbor Similar Levels of Antimicrobial Resistance Regardless of Antibiotic Use Claims

    Article • Journal of Food Protection, September 2019, International Association for Food Protection

    Dr John W. Schmidt

  6. Similar antibiotic resistance in ground beef with and without a raised without antibiotics claim

    Article • Journal of Food Protection, December 2018, International Association for Food Protection

    Dr John W. Schmidt

  7. Effects of In-Feed Chlortetracycline Prophylaxis in Beef Cattle on Antimicrobial Resistance Genes

    Article • Foodborne Pathogens and Disease, November 2018, Mary Ann Liebert Inc

    Dr John W. Schmidt

  8. Surface pH of Fresh Beef as a Parameter To Validate Effectiveness of Lactic Acid Treatment against Escherichia coli O157:H7 and Salmonella

    Article • Journal of Food Protection, July 2018, International Association for Food Protection

    Norasak Kalchayanand, Dr John W. Schmidt

  9. Functional blaKPC-2 Sequences Are Present in U.S. Beef Cattle Feces Regardless of Antibiotic Use

    Article • Foodborne Pathogens and Disease, July 2018, Mary Ann Liebert Inc

    Dr John W. Schmidt

  10. Salmonella in Peripheral Lymph Nodes of Healthy Cattle at Slaughter

    Article • Frontiers in Microbiology, November 2017, Frontiers

    Dr John W. Schmidt

  11. Impact of “Raised without Antibiotics” Beef Cattle Production Practices on Occurrences of Antimicrobial Resistance

    Article • Applied and Environmental Microbiology, September 2017, ASM Journals

    Dr John W. Schmidt

  12. Escherichia coli O157:H7 Strains Isolated from High-Event Period Beef Contamination Have Strong Biofilm-Forming Ability and Low Sanitizer Susceptibility, Which Are Associated with High pO157 Plasmid Copy Number

    Article • Journal of Food Protection, November 2016, International Association for Food Protection

    Dr John W. Schmidt

  13. Effects of In-Feed Chlortetracycline Prophylaxis in Beef Cattle on Animal Health and Antimicrobial-Resistant Escherichia coli

    Article • Applied and Environmental Microbiology, October 2016, ASM Journals

    Terrance M Arthur, Dr John W. Schmidt

  14. Antimicrobial-Resistant Fecal Bacteria from Ceftiofur-Treated and Nonantimicrobial-Treated Comingled Beef Cows at a Cow–Calf Operation

    Article • Microbial Drug Resistance, October 2016, Mary Ann Liebert Inc

    Dr John W. Schmidt

  15. Diagnostic Accuracy of Rectoanal Mucosal Swab of Feedlot Cattle for Detection and Enumeration of Salmonella enterica

    Article • Journal of Food Protection, April 2016, International Association for Food Protection

    Dr John W. Schmidt

  16. Antimicrobial-Resistant Bacterial Populations and Antimicrobial Resistance Genes Obtained from Environments Impacted by Livestock and Municipal Waste

    Article • PLoS ONE, July 2015, PLOS

    Dr John W. Schmidt

  17. Efficacy of Antimicrobial Compounds on Surface Decontamination of Seven Shiga Toxin–Producing Escherichia coli and Salmonella Inoculated onto Fresh Beef†

    Article • Journal of Food Protection, March 2015, International Association for Food Protection

    Terrance M Arthur, Dr John W. Schmidt, Norasak Kalchayanand

  18. Occurrence of Antimicrobial-Resistant Escherichia coli and Salmonella enterica in the Beef Cattle Production and Processing Continuum

    Article • Applied and Environmental Microbiology, November 2014, ASM Journals

    Terrance M Arthur, Dr John W. Schmidt

  19. Immersion in Antimicrobial Solutions Reduces Salmonella enterica and Shiga Toxin–Producing Escherichia coli on Beef Cheek Meat

    Article • Journal of Food Protection, April 2014, International Association for Food Protection

    Dr John W. Schmidt

  20. Mixed Biofilm Formation by Shiga Toxin–Producing Escherichia coli and Salmonella enterica Serovar Typhimurium Enhanced Bacterial Resistance to Sanitization due to Extracellular Polymeric Substances

    Article • Journal of Food Protection, September 2013, International Association for Food Protection

    Dr John W. Schmidt

  21. Characterization of Escherichia coli O157:H7 Strains Isolated from Supershedding Cattle

    Article • Applied and Environmental Microbiology, May 2013, ASM Journals

    Terrance M Arthur, Dr John W. Schmidt

  22. The physiologic state of Escherichia coli O157:H7 does not affect its detection in two commercial real-time PCR-based tests

    Article • Food Microbiology, April 2013, Elsevier

    Terrance M Arthur, Dr John W. Schmidt

  23. Cross-sectional Study Examining Salmonella enterica Carriage in Subiliac Lymph Nodes of Cull and Feedlot Cattle at Harvest

    Article • Foodborne Pathogens and Disease, April 2013, Mary Ann Liebert Inc

    Terrance M Arthur, Dr John W. Schmidt

  24. Influence of Therapeutic Ceftiofur Treatments of Feedlot Cattle on Fecal and Hide Prevalences of Commensal Escherichia coli Resistant to Expanded-Spectrum Cephalosporins, and Molecular Characterization of Resistant Isolates

    Article • Applied and Environmental Microbiology, January 2013, ASM Journals

    Dr John W. Schmidt

  25. Detection of Escherichia coli O157:H7 and Salmonella enterica in Air and Droplets at Three U.S. Commercial Beef Processing Plants†

    Article • Journal of Food Protection, December 2012, International Association for Food Protection

    Terrance M Arthur, Dr John W. Schmidt

  26. Evaluation of Commonly Used Antimicrobial Interventions for Fresh Beef Inoculated with Shiga Toxin–Producing Escherichia coli Serotypes O26, O45, O103, O111, O121, O145, and O157:H7†

    Article • Journal of Food Protection, July 2012, International Association for Food Protection

    Terrance M Arthur, Dr John W. Schmidt

  27. Dual-Serotype Biofilm Formation by Shiga Toxin-Producing Escherichia coli O157:H7 and O26:H11 Strains

    Article • Applied and Environmental Microbiology, June 2012, ASM Journals

    Dr John W. Schmidt

  28. Microbiological Analysis of Bovine Lymph Nodes for the Detection of Salmonella enterica†

    Article • Journal of Food Protection, May 2012, International Association for Food Protection

    Terrance M Arthur, Dr John W. Schmidt

  29. Efficacy of Hypobromous Acid as a Hide-On Carcass Antimicrobial Intervention

    Article • Journal of Food Protection, May 2012, International Association for Food Protection

    Dr John W. Schmidt

  30. Prevalence, Enumeration, Serotypes, and Antimicrobial Resistance Phenotypes of Salmonella enterica Isolates from Carcasses at Two Large United States Pork Processing Plants

    Article • Applied and Environmental Microbiology, February 2012, ASM Journals

    Dr John W. Schmidt

  31. Novel Common Integration Sites Targeted by Mouse Mammary Tumor Virus Insertion in Mammary Tumors Have Oncogenic Activity

    Article • PLoS ONE, November 2011, PLOS

    Dr. Susan R Ross, Dr John W. Schmidt, Dr Susan R Ross

  32. Generation of ramoplanin-resistant Staphylococcus aureus

    Article • FEMS Microbiology Letters, August 2010, Oxford University Press (OUP)

    Dr John W. Schmidt

  33. An Immunoreceptor Tyrosine Activation Motif in the Mouse Mammary Tumor Virus Envelope Protein Plays a Role in Virus-Induced Mammary Tumors

    Article • Journal of Virology, September 2006, ASM Journals

    Dr. Susan R Ross, Dr John W. Schmidt, Dr Susan R Ross

  34. NBU1 integrase: evidence for an altered recombination mechanism

    Article • Molecular Microbiology, April 2006, Wiley

    Dr John W. Schmidt