John W Schmidt
Meat Safety and Quality
Research Microbiologist
Phone: (402) 762-4226
Fax:
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Publications
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The GEA pipeline for characterizing Escherichia coli and Salmonella genomes
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Dickey, A.M., Schmidt, J.W., Bono, J.L., Guragain, M. 2024. The GEA pipeline for characterizing Escherichia coli and Salmonella genomes. Scientific Reports. 14. Article 13257. https://doi.org/10.1038/s41598-024-63832-z.
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Antibiotic resistance and disinfectant resistance among Escherichia coli isolated during red meat production
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Guragain, M., Bagi, L.K., Schmidt, J.W., Paoli, G., Kalchayanand, N., Bosilevac, J.M. 2024. Antibiotic resistance and disinfectant resistance among Escherichia coli isolated during red meat production. Journal of Food Protection. 87(6):100288. https://doi.org/10.1016/j.jfp.2024.100288.
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Identifying a list of Salmonella serotypes of concern to target for reducing risk of salmonellosis
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Katz, T.S., Harhay, D.M., Schmidt, J.W., Wheeler, T.L. 2024. Identifying a list of Salmonella serotypes of concern to target for reducing risk of salmonellosis. Frontiers in Microbiology. 15. Article 1307563. https://doi.org/10.3389/fmicb.2024.1307563.
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Multiplex high resolution melt curve real-time PCR assay for detection of extended-spectrum Beta-lactam-resistant Shiga toxin-producing E. coli
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Identification of actionable sentinels for Salmonella contamination of beef lymph nodes and determining the impact of environmental contamination levels
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Schmidt, J.W., Fashenpour, E., Soler-Diaz, R., Harhay, D.M., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L., Kang, Q., Gragg, S.E., Sanchez-Plata, M. 2023. Identification of actionable sentinels for Salmonella contamination of beef lymph nodes and determining the impact of environmental contamination levels. [Abstract]. American Meat Science Association Conference Reciprocal Proceedings. No. 117.
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The effects of the administration of a Saccharomyces cerevisiae direct-fed microbial on the prevalence of Salmonella in bovine mesenteric lymph nodes
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Habib, K., Schmidt, J.W., Nichols, C.A., Kang, Q., Bosilevac, J.M., Harhay, D.M., Gragg, S.E. 2022. The effects of the administration of a Saccharomyces cerevisiae direct-fed microbial on the prevalence of Salmonella in bovine mesenteric lymph nodes. [Abstract]. International Association for Food Protection Proceedings. P1-83.
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Identification of dominant factors contributing to persistence of third-generation cephalosporin-resistant Salmonella at a beef cattle feedyard
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Schmidt, J.W., Murray, S.A., Dickey, A.M., Wheeler, T.L., Harhay, D.M., Arthur, T.M. 2023. Identification of dominant factors contributing to persistence of third-generation cephalosporin-resistant Salmonella at a beef cattle feedyard. [Abstract]. International Association for Food Protection Proceedings. T4-10.
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Distribution of extremely heat-resistant Escherichia coli in the beef production and processing continuum
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Guragain, M., Schmidt, J.W., Dickey, A.M., Bosilevac, J.M. 2023. Distribution of extremely heat-resistant Escherichia coli in the beef production and processing continuum. Journal of Food Protection. 86(1). Article 100031. https://doi.org/10.1016/j.jfp.2022.100031.
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Tetracycline-resistant, third-generation cephalosporin–resistant, and extended-spectrum b-lactamase–producing Escherichia coli in a beef cow-calf production system
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Agga, G.E., Galloway, H.O., Netthisinghe, A.M., Schmidt, J.W., Arthur, T.M. 2022. Tetracycline-resistant, third-generation cephalosporin–resistant, and extended-spectrum b-lactamase–producing Escherichia coli in a beef cow-calf production system. Journal of Food Protection. 85(11):1522-1530. https://doi.org/10.4315/JFP-22-178.
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Characterization and comparison of Salmonella spp. isolated from the mesenteric lymph nodes of cattle and the feedlot environment
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Characterization of Escherichia coli harboring colibactin genes (clb) isolated from beef production and processing systems
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Guragain, M., Schmidt, J.W., Kalchayanand, N., Dickey, A.M., Bosilevac, J.M. 2022. Characterization of Escherichia coli harboring colibactin genes (clb) isolated from beef production and processing systems. Nature Scientific Reports. 12. Article 5305. https://doi.org/10.1038/s41598-022-09274-x.
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A farm-to-fork quantitative microbial exposure assessment of beta-lactam resistant Escherichia coli among U.S. beef consumers
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Zhang, Y., Schmidt, J.W., Arthur, T.M., Wheeler, T.L., Zhang, Q., Wang, B. 2022. A farm-to-fork quantitative microbial exposure assessment of beta-lactam resistant Escherichia coli among U.S. beef consumers. Microorganisms. 10(3). Article 661. https://doi.org/10.3390/microorganisms10030661.
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Resistomes and microbiomes of meat trimmings and colon content from culled cows raised in conventional and organic production systems
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Weinroth, M.D., Thomas, K.M., Doster, E., Vikram, A., Schmidt, J.W., Arthur, T.M., Wheeler, T.L., Parker, J.K., Hanes, A.S., Alekoza, N., Wolfe, C., Metcalf, J.L., Morley, P.S., Belk, K.E. 2022. Resistomes and microbiomes of meat trimmings and colon content from culled cows raised in conventional and organic production systems. Animal Microbiome. 4. Article 21. https://doi.org/10.1186/s42523-022-00166-z.
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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
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Schmidt, J.W., Murray, S.A., Dickey, A.M., Wheeler, T.L., Harhay, D.M., Arthur, T.M. 2022. 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. Journal of Food Protection. 85(2):323-335. https://doi.org/10.4315/JFP-21-371.
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Ensuring Escherichia coli possessing colibactin genes (clb) linked to colorectal cancer do not become a food safety problem for beef
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Guragain, M., Schmidt, J.W., Kalchayanand, N., Bosilevac, J.M. 2023. Ensuring Escherichia coli possessing colibactin genes (clb) linked to colorectal cancer do not become a food safety problem for beef. Journal of Food Protection. 84(Suppl A): P. 134.
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Antimicrobial resistance in U.S. retail ground beef with and without label claims regarding antibiotic use
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Schmidt, J.W., Vikram, A., Doster, E., Thomas, K., Weinroth, M.D., Parker, J., Hanes, A., Geornaras, I., Morley, P.S., Belk, K.E., Wheeler, T.L., Arthur, T.M. 2021. Antimicrobial resistance in U.S. retail ground beef with and without label claims regarding antibiotic use. Journal of Food Protection. 84(5):827-842. https://doi.org/10.4315/JFP-20-376.
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A comparative quantitative assessment of human exposure to various antimicrobial-resistant bacteria among U.S. ground beef consumers
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Zhang, Y., Schmidt, J.W., Arthur, T.M., Wheeler, T.L., Wang, B. 2021. A comparative quantitative assessment of human exposure to various antimicrobial-resistant bacteria among U.S. ground beef consumers. Journal of Food Protection. 84(5):736-759. https://doi.org/10.4315/JFP-20-154.
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Metagenomic characterization of the microbiome and resistome of retail ground beef products
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Doster, E., Thomas, K.M., Weinroth, M.D., Parker, J.K., Crone, K.K., Arthur, T.M., Schmidt, J.W., Wheeler, T.L., Belk, K.E., Morley, P.S. 2020. Metagenomic characterization of the microbiome and resistome of retail ground beef products. Frontiers in Microbiology. 11. Article 541972.. https://doi.org/10.3389/fmicb.2020.541972.
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Seasonal prevalence of Shiga toxin-producing Escherichia coli on pork carcasses for three steps of the harvest process at two commercial processing plants in the United States
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Nastasijevic, I., Schmidt, J.W., Boskovic, M., Glisic, M., Kalchayanand, N., Shackelford, S.D., Wheeler, T.L., Koohmaraie, M., Bosilevac, J.M. 2020. Seasonal prevalence of Shiga toxin-producing Escherichia coli on pork carcasses for three steps of the harvest process at two commercial processing plants in the United States. Applied and Environmental Microbiology. 87(1):e01711-20. https://doi.org/10.1128/AEM.01711-20.
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Antimicrobial resistance at two United States cull cow processing establishments
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Schmidt, J.W., Vikram, A., Arthur, T.M., Belk, K.E., Morley, P.S., Weinroth, M.D., Wheeler, T.L. 2020. Antimicrobial resistance at two United States cull cow processing establishments. Journal of Food Protection. 83(12):2216-2228. https://doi.org/10.4315/JFP-20-201.
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SMART antimicrobial resistance goals to drive meat safety improvement
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Schmidt, J.W. 2020. SMART antimicrobial resistance goals to drive meat safety improvement. In: Proceedings of International Congress of Meat Science and Technology. Lake Buena Vista, Florida, Jul 31-Aug 7, 2020. Meat and Muscle Biology. 4(2):1-8. https://doi.org/10.22175/mmb.11218.
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No change in risk for antibiotic-resistant Salmonellosis from beef, United States, 2002-2010
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Costard, S., Pouzou, J., Belk, K.E., Morley, P.S., Schmidt, J.W., Wheeler, T.L., Arthur, T.M., Zagmutt, F. 2020. No change in risk for antibiotic-resistant Salmonellosis from beef, United States, 2002-2010. Emerging Infectious Diseases. 26(9):2108-2117. https://doi.org/10.3201/eid2609.190922.
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High prevalence of extremely heat-resistant Escherichia coli in finished beef products
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Guragain, M., Schmidt, J., Bosilevac, J.M. 2020. High prevalence of extremely heat-resistant Escherichia coli in finished beef products. [Abstract] International Association for Food Protection Proceedings, August 2-5, 2020, San Antonio, Texas [Virtual]. Journal of Food Protection. 83(Supplement A):P2-99.
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Persistence of third-generation cephalosporin-resistant Salmonella over two years at a beef cattle feedlot
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In-feed tylosin phosphate administration to feedlot cattle minimally affects antimicrobial resistance
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Schmidt, J.W., Vikram, A., Miller, E., Jones, S., Arthur, T.M. 2020. In-feed tylosin phosphate administration to feedlot cattle minimally affects antimicrobial resistance. Journal of Food Protection. 83(2):350-364. https://doi.org/10.4315/0362-028X.JFP-19-342.
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Cropland amendment with beef cattle manure minimally affects antimicrobial resistance
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Miller, E., Spiehs, M., Arthur, T.M., Woodbury, B., Cortus, E., Chatterjee, A., Rahman, S., Schmidt, J.W. 2019. Cropland amendment with beef cattle manure minimally affects antimicrobial resistance. Journal of Environmental Quality. 48:1683-1693. https://doi.org/10.2134/jeq2019.02.0042.
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Food service pork chops from three U.S. regions harbor similar levels of antimicrobial resistance regardless of antibiotic use claims
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Vikram, A., Miller, E., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L., Schmidt, J.W. 2019. Food service pork chops from three U.S. regions harbor similar levels of antimicrobial resistance regardless of antibiotic use claims. Journal of Food Protection. 82(10):1667-1676. https://doi.org/10.4315/0362-028x.jfp-19-139.
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Occurrences of antimicrobial resistant bacteria and antimicrobial resistance genes in retail ground beef with and without a “Raised without Antibiotics” claim
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Antimicrobial use and resistance in United States beef production
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Schmidt, J.W., Wheeler, T.L., Arthur, T.M. 2019. Antimicrobial use and resistance in United States beef production. [Abstract]. American Chemistry Society Abstracts. Paper No. 133.
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Similar levels of antimicrobial resistance in U.S. food service ground beef products with and without a "Raised Without Antibiotics" claim
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Vikram, A., Miller, E., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L., Schmidt, J.W. 2018. Similar levels of antimicrobial resistance in U.S. food service ground beef products with and without a "Raised Without Antibiotics" claim. Journal of Food Protection. 81(12):2007-2018. https://doi.org/10.4315/0362-028X.JFP-18-299.
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Effects of in-feed Chlortetracycline prophylaxis in beef cattle on antimicrobial resistance genes
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Miller, E.W., Vikram, A., Agga, G.E., Arthur, T.M., Schmidt, J.W. 2018. Effects of in-feed Chlortetracycline prophylaxis in beef cattle on antimicrobial resistance genes. Foodborne Pathogens and Disease. 15(1):689-697. https://doi.org/10.1089/fpd.2018.2475.
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A comparison of the resistome between natural and conventional retail ground beef products
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Thomas, K., Weinroth, M., Parker, J., Metcalf, J.L., Arthur, T.M., Schmidt, J.W., Wheeler, T.L., Vikram, A., Woerner, D.R., Morley, P.S., Belk, K.E. 2019. A comparison of the resistome between natural and conventional retail ground beef products [abstract]. In: American Meat Science Association Reciprocal Meat Conference proceedings, Kansas City, MO. June 24-27, 2018. Meat and Muscle Biology. 2(2):147-148. https://doi.org/10.22175/rmc2018.130.
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Surface pH of fresh beef as a parameter to validate effectiveness of lactic acid treatment against Escherichia O157:H7 and Salmonella
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Kalchayanand, N., Arthur, T.M., Bosilevac, J.M., Schmidt, J.W., Shackelford, S.D., Brown, T., Wheeler, T.L. 2018. Surface pH of fresh beef as a parameter to validate effectiveness of lactic acid treatment against Escherichia O157:H7 and Salmonella. Journal of Food Protection. 81(7):1126-1133. https://doi.org/10.4315/0362-028X.JFP-17-469.
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Functional blaKPC-2 sequences are present in U.S. beef cattle feces regardless of antibiotic use
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Vikram, A., Schmidt, J.W. 2018. Functional blaKPC-2 sequences are present in U.S. beef cattle feces regardless of antibiotic use. Foodborne Pathogens and Disease. 15(7):444-448. https://doi.org/10.1089/fpd.2017.2406.
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Studies performed in the proper context suggest that antimicrobial use during swine and cattle production minimally impact antimicrobial resistance
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Schmidt, J.W., Wheeler, T.L., Arthur, T. 2018. Studies performed in the proper context suggest that antimicrobial use during swine and cattle production minimally impact antimicrobial resistance [abstract]. Journal of Animal Science. 96(Supplement 2):197. https://doi.org/10.1093/jas/sky073.362.
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Salmonella in peripheral lymph nodes of healthy cattle at slaughter
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Webb, H.E., Harhay, D.M., Brashers, M.M., Nightengale, K.K., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Schmidt, J.W., Wang, R., Granier, S.A., Brown, T.R., Edrington, T.S., Shackelford, S.D., Wheeler, T.L., Loneragan, G.H. 2017. Salmonella in peripheral lymph nodes of healthy cattle at slaughter. Frontiers in Microbiology. 8:2214. https://doi.org/10.3389/fmicb.2017.02214.
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Impact of "raised without antibiotics" beef cattle production practices on occurrences of antimicrobial resistance
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Vikram, A., Rovira, P., Agga, G.E., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L., Morley, P., Belk, K., Schmidt, J.W. 2017. Impact of "raised without antibiotics" beef cattle production practices on occurrences of antimicrobial resistance. Applied and Environmental Microbiology. 83:e01682-17. https://doi.org/10.1128/AEM.01682-17.
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Biofilm formation, antimicrobial resistance, and sanitizer tolerance of Salmonella enterica strains isolated from beef trim
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Wang, R., Schmidt, J.W., Harhay, D.M., Bosilevac, J.M., King, D.A., Arthur, T.M. 2017. Biofilm formation, antimicrobial resistance, and sanitizer tolerance of Salmonella enterica strains isolated from beef trim. Foodborne Pathogens and Disease. 14(12):687-695. https://doi.org/10.1089/fpd.2017.2319.
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Effect of winter cover crop grazing on animal performance and antibiotic resistance during pre-weaning period in beef cattle
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Agga, G.E., Galloway, H.O., Arthur, T.M., Schmidt, J.W., Netthisinghe, A.M. 2017. Effect of winter cover crop grazing on animal performance and antibiotic resistance during pre-weaning period in beef cattle. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Paper No. 1327.
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Proper context: Comparison studies demonstrate that United States food-animal production antimicrobial uses have minimal impact on antimicrobial resistance
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Schmidt, J.W., Wheeler, T.L., Arthur, T.M. 2017. Proper context: Comparison studies demonstrate that United States food-animal production antimicrobial uses have minimal impact on antimicrobial resistance. Meeting Abstract. [Abstract]. International Sysmposium on the Environmental Dimension of Antibiotic Resistance (4th), Lansing, Michigan, August 13-17, 2017. http://www.antibiotic-resistance.de/.
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Providing context: antimicrobial resistance from multiple environmental sources
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Arthur, T.M., Agga, G.E., Schmidt, J.W. 2017. Providing context: antimicrobial resistance from multiple environmental sources. [Abstract]. American Society for Microbiology General Meeting. p.32, S4:8.
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Effect of in-feed Chlortetracycline prophylaxis in beef cattle on levels of 10 antimicrobial resistance genes
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Miller, E.W., Agga, G.E., Vikram, A., Arthur, T.M., Schmidt, J.W. 2017. Effect of in-feed Chlortetracycline prophylaxis in beef cattle on levels of 10 antimicrobial resistance genes. [Abstract]. American Society for Microbiology Meeting. p.43, no.13.
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Impact of raised without antibiotics practices on occurrences of antimicrobial resistance
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Vikram, A., Rovira, P., Miller, E.W., Agga, G.E., Wheeler, T.L., Arthur, T.M., Schmidt, J.W. 2017. Impact of raised without antibiotics practices on occurrences of antimicrobial resistance. [Abstract]. American Society for Microbiology General Meeting. p. 14, S1:5.
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Effects of in-feed Chlortetracycline Prophylaxis of beef cattle on animal health and antimicrobial-resistant Escherichia coli
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Agga, G.E., Schmidt, J.W., Arthur, T.M. 2017. Effects of in-feed Chlortetracycline Prophylaxis of beef cattle on animal health and antimicrobial-resistant Escherichia coli. Meeting Abstract. [Abstract]. Beef Industry Safety Summit, February 28-March 2, 2017, Houston, Texas, Available:http://bifsco.org/search.aspx?qal=2017 abstracts.
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Impact of antimicrobial use during beef production on fecal occurrence of antimicrobial resistance
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Vikram, A., Rovira, P., Agga, G.E., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L., Morley, P., Belk, K., Schmidt, J.W. 2017. Impact of antimicrobial use during beef production on fecal occurrence of antimicrobial resistance. Meeting Abstract. [Abstract]. Beef Industry Safety Summit, February 28-March 2, 2017, Houston, Texas. Available:http://bifsco.org/search.aspx?qal=2017 abstracts.
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Methods for detecting pathogens in the beef food chain: detecting particular pathogens
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Fratamico, P.M., Bosilevac, J.M., Schmidt, J.W. 2017. Methods for detecting pathogens in the beef food chain: detecting particular pathogens. In: Acuff, G., Dickson, J. Ensuring safety and quality in the production of beef. Volume 1: Safety. Cambridge, UK: Burleigh Dobbs Science. p.59-72.
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Effects of in-feed chlortetracycline prophylaxis of beef cattle on animal health and antimicrobial-resistant Escherichia coli
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Agga, G.E., Schmidt, J.W., Arthur, T.M. 2016. Effects of in-feed chlortetracycline prophylaxis of beef cattle on animal health and antimicrobial-resistant Escherichia coli. Applied and Environmental Microbiology. 82(24):7197-7204. doi:10.1128/AEM.01928-16.
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Methods for detecting pathogens in the beef food chain: an overview
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Fratamico, P.M., Bosilevac, J.M., Schmidt, J.W. 2017. Methods for detecting pathogens in the beef food chain: an overview. In: Acuff, G., Dickson, J. Ensuring safety and quality in the production of beef. Volume 1: Safety. Cambridge, UK: Burleigh Dobbs Science. p.35-51.
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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
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Wang, R., Luedtke, B.E., Bosilevac, J.M., Schmidt, J.W., Kalchayanand, N., Arthur, T.M. 2016. 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. Journal of Food Protection. 79(11):1875-1883. doi:10.4315/0362-028X.JFP-16-113.
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Effect of calcium hydroxide application to cattle feedlot pens on Escherichia coli O157:H7 and total E. coli in pen surface manure
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Berry, E.D., Wells, J., Arthur, T.M., Schmidt, J.W., Spiehs, M.J., Woodbury, B.L. 2016. Effect of calcium hydroxide application to cattle feedlot pens on Escherichia coli O157:H7 and total E. coli in pen surface manure [Abstract]. Journal of Food Protection. Supp. A(79):P2-122.
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Antimicrobial-resistant fecal bacteria from ceftiofur-treated and nonantimicrobial-treated comingled beef cows at a cow-calf operation
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Agga, G.E., Schmidt, J.W., Arthur, T.M. 2016. Antimicrobial-resistant fecal bacteria from ceftiofur-treated and nonantimicrobial-treated comingled beef cows at a cow-calf operation. Microbial Drug Resistance. 22(7):598-608. doi:10.1089/mdr.2015.0259.
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Diagnostic accuracy of rectoanal mucosal swab of feedlot cattle for detection and enumeration of Salmonella enterica
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Agga, G.E., Arthur, T.M., Schmidt, J.W., Wang, R., Harhay, D.M. 2016. Diagnostic accuracy of rectoanal mucosal swab of feedlot cattle for detection and enumeration of Salmonella enterica. Journal of Food Protection. 79(4):531-537. doi:10.4315/0362-028X.JFP-15-409.
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Antimicrobial resistance issues in beef production
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Schmidt, J.W. 2015. Antimicrobial resistance issues in beef production.Proceedings of the American Meat Science Association Reciprocal Conference, June 13-17, 2015, Lincoln, NE, p. 55-58.
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Antimicrobial-resistant bacterial populations and antimicrobial resistance genes obtained from environments impacted by livestock and municipal waste
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Agga, G.E., Arthur, T.M., Durso, L.M., Harhay, D.M., Schmidt, J.W. 2015. Antimicrobial-resistant bacterial populations and antimicrobial resistance genes obtained from environments impacted by livestock and municipal waste. PLoS One. 10(7).
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Variations in the fecal occurrences of antimicrobial-resistant bacteria are greater between seasons than between "raised without antibiotics" and "conventional" cattle production systems
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Schmidt, J.W., Agga, G.E., Bosilevac, J.M., Wheeler, T.L., Arthur, T.M. 2015. Variations in the fecal occurrences of antimicrobial-resistant bacteria are greater between seasons than between "raised without antibiotics" and "conventional" cattle production systems.[Abstract] 4th American Society for Microbiology Conference on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens. S7:4,p.102.
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Antimicrobial resistance of enteric bacteria among ceftiofur treated and non-antimicrobial treated co-mingled pasture beef cows
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Agga, G.E., Schmidt, J.W., Arthur, T.M. 2015. Antimicrobial resistance of enteric bacteria among ceftiofur treated and non-antimicrobial treated co-mingled pasture beef cows.[Abstract]. 4th American Society for Microbiology Conference on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens. S6:5, p.39.
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Characterization of E. coli O157:H7 strains isolated from “High Event Period” beef trim contamination
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Wang, R., Luedtke, B.E., Kalchayanand, N., Schmidt, J.W., Bosilevac, J.M., Arthur, T.M. 2015. Characterization of E. coli O157:H7 strains isolated from “High Event Period” beef trim contamination. [Abstract] International Association for Food Protection Proceedings. Volume 78 (Supplement A): page 64. (T10-211).
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Efficacy of antimicrobial compounds on surface decontamination of seven shiga toxin-producing Escherichia coli (STEC) and Salmonella inoculated onto fresh beef
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Kalchayanand, N., Arthur, T.M., Bosilevac, J.M., Schmidt, J.W., Wang, R., Shackelford, S.D., Wheeler, T.L. 2015. Efficacy of antimicrobial compounds on surface decontamination of seven shiga toxin-producing Escherichia coli and Salmonella inoculated onto fresh beef. Journal of Food Protection. 78(3):503-510.
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Occurrence of antimicrobial-resistant Escherichia coli and Salmonella enterica in the beef cattle production and processing continuum
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Schmidt, J.W., Agga, G.E., Bosilevac, J.M., Harhay, D.M., Shackelford, S.D., Wang, R., Wheeler, T.L., Arthur, T.M. 2015. Occurrence of antimicrobial-resistant Escherichia coli and Salmonella enterica in the beef cattle production and processing continuum. Applied and Environmental Microbiology. 81(2):713-725.
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Antibiotic resistant Escherichia coli and Salmonella enterica in the beef production and processing chain
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Schmidt, J.W., Harhay, D.M., Shackelford, S.D., Wheeler, T.L., Arthur, T.M. 2014. Antibiotic resistant Escherichia coli and Salmonella enterica in the beef production and processing chain. [abstract] American Society for Microbiology 114th General Meeting. No. 1033.
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Effect of direct-fed microbial supplementation on the presence of Salmonella enterica in bovine peripheral lymph nodes
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Harhay, D.M., Loneragan, G.H., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Schmidt, J.W., Wang, R., Wheeler, T.L., Kolath, B., Theunick, D., Riemann, M., Schaefer, D., Brown, T. 2014. Effect of direct-fed microbial supplementation on the presence of Salmonella enterica in bovine peripheral lymph nodes. [Abstract]. International Association for Food Protection. Supp. A(77):211-212. P3-65.
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Examination of predictors of Salmonella enterica contamination in cattle feedlot environments
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Harhay, D.M., Arthur, T.M., Schmidt, J.W., Wang, R., Kalchayanand, N., Bosilevac, J.M., Edrington, T.S., Loneragan, G., Wheeler, T.L. 2014. Examination of predictors of Salmonella enterica contamination in cattle feedlot environments. [Abstract] Beef Industray Safety Summit. Available: www.bifsco.org/attendees.aspx.
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Antibiotic resistance by source: human-cattle-swine
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Arthur, T.M., Agga, G.E., Schmidt, J.W. 2014. Antibiotic resistance by source: human-cattle-swine. [Abstract] Beef Industry Safety Summit. Available: www.bifsco.org/attendees.aspx.
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Prevalence and serotypes of intimin (eae) positive Shiga toxin-producing E. coli colonizing cattle arriving at fed beef and cull cow plants in the US
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Bosilevac, J.M., Luedtke, B.E., Arthur, T.M., Kalchayanand, N., Schmidt, J.W., Shackelford, S.D., Wheeler, T.L. 2014. Prevalence and serotypes of intimin (eae) positive Shiga toxin-producing E. coli colonizing cattle arriving at fed beef and cull cow plants in the U.S. [abstract] Beef Industry Safety Summit. Available: www.bifsco.org/attendees.aspx.
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Immersion in antimicrobial solutions reduces Salmonella enterica and Shiga toxin-producing Escherichia coli on beef cheek meat
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Schmidt, J.W., Bosilevac, J.M., Kalchayanand, N., Wang, R., Wheeler, T.L., Koohmaraie, M. 2014. Immersion in antimicrobial solutions reduces Salmonella enterica and Shiga toxin-producing Escherichia coli on beef cheek meat. Journal of Food Protection. 77(4):538-548.
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Bacterial antibiotic resistance, animal agriculture, and human health: no simple answer at the interface of three complex systems
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Schmidt, J.W. 2013. Bacterial antibiotic resistance, animal agriculture, and human health: no simple answer at the interface of three complex systems. Proceedings of the American Meat Science Association Reciprocal 66th Annual Meat Conference, June 16-19, 2013, Auburn, Alabama, p.60-63.
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Characterization of Escherichia coli 0157:H7 strains isolated from supershedding cattle
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Arthur, T.M., Ahmed, R., Chase-Topping, M., Kalchayanand, N., Schmidt, J.W., Bono, J.L. 2013. Characterization of Escherichia coli 0157:H7 strains isolated from supershedding cattle. Applied and Environmental Microbiology. 79(14):4294-4303.
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Mixed biofilm formation by Shiga toxin-producing Escherichia coli and Salmonella enterica serovar typhimurium enhanced bacterial resistance to sanitization due to extracellular polymeric substances
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Wang, R., Kalchayanand, N., Schmidt, J.W., Harhay, D.M. 2013. Mixed biofilm formation by Shiga toxin-producing Escherichia coli and Salmonella enterica serovar typhimurium enhanced bacterial resistance to sanitization due to extracellular polymeric substances. Journal of Food Protection. 76(9):1513-1522.
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Longitudinal concentrations of antibiotic resistant Escherichia coli in feces do not correspond to the patterns of antibiotic use at a cattle feedlot
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Schmidt, J.W. 2013. Longitudinal concentrations of antibiotic resistant Escherichia coli in feces do not correspond to the patterns of antibiotic use at a cattle feedlot. American Society for Microbiology Annual Meeting. Poster No. 15 p. 101.
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Characterization of E. coli O157:H7 strains isolated from super-shedding cattle
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Arthur, T.M., Ahmed, R., Chase-Topping, M., Kalchayanand, N., Schmidt, J.W., Bono, J.L. 2013. Characterization of E. coli O157:H7 strains isolated from super-shedding cattle. American Society for Microbiology General Meeting. Poster No. 1707, p 171.
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Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest
- (Peer Reviewed Journal)
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Gragg, S.E., Loneragan, G.H., Brashears, M.M., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Wang, R., Schmidt, J.W., Brooks, J.C., Shackelford, S.D., Wheeler, T.L., Brown, T.R., Edrington, T.S., Brichta-Harhay, D.M. 2013. Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest. Foodborne Pathogens and Disease. 10:368-374.
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Salmonella in lymph nodes of cull and fed cattle at harvest
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Webb, H.E., Harhay, D.M., Gragg, S.E., Brashears, M.M., Nightingale, K.K., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Schmidt, J.W., Wang, R., Lonergan, G.H. 2013. Salmonella in lymph nodes of cull and fed cattle at harvest. IN: Proceedings of The Beef Industry Summit 2013, March 13-15, 2013, Dallas Texas, 2013 FLASHDRIVE.
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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
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Schmidt, J.W., Griffin, D., Kuehn, L.A., Harhay, D.M. 2013. 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. Applied and Environmental Microbiology. 79(7):2273-2283.
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Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest
- (Peer Reviewed Journal)
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Gragg, S.E., Loneragan, G.H., Brashears, M.M., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Wang, R., Schmidt, J.W., Brooks, J., Shackelford, S.D., Wheeler, T.L., Brown, T.R., Edrington, T.S., Harhay, D.M. 2013. Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest. Foodborne Pathogens and Disease. 10(4):368-374.
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The physiologic state of Escherichia coli O157:H7 does not affect its detection in two commercial real-time PCR-based tests
- (Peer Reviewed Journal)
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Wang, R., Schmidt, J.W., Arthur, T.M., Bosilevac, J.M. 2013. The physiologic state of Escherichia coli O157:H7 does not affect its detection in two commercial real-time PCR-based tests. Food Microbiology. 33: 205-212.
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Detection of Escherichia coli O157:H7 and Salmonella enterica in air and droplets at three U.S. commercial beef processing plants
- (Peer Reviewed Journal)
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Schmidt, J.W., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Wheeler, T.L. 2012. Detection of Escherichia coli O157:H7 and Salmonella enterica in air and droplets at three U. S. commercial beef processing plants. Journal of Food Protection. 75(12):2213-2218.
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Dual-serotype biofilm formation by Shiga toxin-producing Escherichia coli 0157:H7 and 026:H11 strains
- (Peer Reviewed Journal)
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SWang, R., Kalchayanand, N., Schmidt, J.W., Bosilevac, J.M., Bono, J.L. 2012. Dual-serotype biofilm formation by Shiga toxin-producing Escherichia coli 0157:H7 and 026:H11 strains. Applied and Environmental Microbiology. 78(17):6341-6344.
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Prevalence of lactose fermenting coliforms resistant to third generation cephalosporins in cattle feedlot throughout a production cycle and molecular characterization of resistant isolates
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Schmidt, J.W., Kuehn, L.A., Griffin, D., Harhay, D.M. 2012. Prevalence of lactose fermenting coliforms resistant to third generation cephalosporins in cattle feedlot throughout a production cycle and molecular characterization of resistant isolates [abstract]. International Association for Food Protection. p. 148-149. Abstract No. P2-95.
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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
- (Peer Reviewed Journal)
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Kalchayanand, N., Arthur, T.M., Bosilevac, J.M., Schmidt, J.W., Wang, R., Shackelford, S.D., Wheeler, T.L. 2012. 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. Journal of Food Protection. 75(7):1207-1212.
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Prevalence, enumeration, serotypes, and antimicrobial resistance phenotypes of Salmonella enterica isolates from carcasses at two large United States pork processing plants
- (Peer Reviewed Journal)
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Schmidt, J.W., Harhay, D.M., Kalchayanand, N., Bosilevac, J.M., Shackelford, S.D., Wheeler, T.L., Koohmaraie, M. 2012. Prevalence, enumeration, serotypes, and antimicrobial resistance phenotypes of Salmonella enterica isolates from carcasses at two large United States pork processing plants. Applied and Environmental Microbiology. 78(8):2716-2726.
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Efficacy of hypobromous acid as a hide-on carcass antimicrobial intervention
- (Peer Reviewed Journal)
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Schmidt, J.W., Wang, R., Kalchayanand, N., Wheeler, T.L., Koohmaraie, M. 2012. Efficacy of hypobromous acid as a hide-on carcass antimicrobial intervention. Journal of Food Protection. 75 (5): 955-958.
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Microbiological analysis of bovine lymph nodes for the detection of Salmonella enterica
- (Peer Reviewed Journal)
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Harhay, D.M., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Schmidt, J.W., Wang, R., Shackelford, S.D., Loneragan, G.H., Wheeler, T.L. 2012. Microbiological analysis of bovine lymph nodes for the detection of Salmonella enterica. Journal of Food Protection. 75(5):854-858.
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Salmonella in lymph nodes of cattle presented for harvest
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Gragg, S.E., Loneragan, G.H., Brashears, M.M., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Wang, R., Schmidt, J.W., Brooks, J.C., Shackelford, S.D., Wheeler, T.L., Brown, T.R., Brichta-Harhay, D.M. 2011. Salmonella in lymph nodes of cattle presented for harvest [abstract]. Proceeding of the 2011 Conference of Research Workers in Animal Diseases, December 4-6, 2011, Chicago, Illinois. p. 149.
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Salmonella in lymph nodes of cattle presented for harvest
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Gragg, S.E., Loneragan, G.H., Brichta-Harhay, D.M., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Wang, R., Schmidt, J.W., Brooks, J.C., Shackelford, S.D., Wheeler, T.L., Brown, T.R., Brashears, M.M. 2011. Salmonella in lymph nodes of cattle presented for harvest [abstract]. International Association for Food Protection. p. 19. Abstract No. P1-62.
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Towards an understanding of how Salmonella potentially evades beef carcass processing interventions
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Brichta-Harhay, D.M., Gragg, S.E., Smith, T.P.L., Arthur, T.M., Bosilevac, J.M., Kalchayanand, N., Schmidt, J.W., Wang, R., Shackelford, S.D., Wheeler, T.L., Brashears, M.M., Brooks, J.C., Brown, T.R., Harhay, G.P., Loneragan, G.H. 2011. Towards an understanding of how Salmonella potentially evades beef carcass processing interventions [abstract]. 2011 Beef Industry Safety Summit. Abstract No. 2.
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The effect of sample size and matrix on the ability of rapid methods to detect E. coli O157:H7
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Bosilevac, J.M., Schmidt, J.W., Kalchayanand, N., Wheeler, T.L., Koohmaraie, M. 2011. The effect of sample size and matrix on the ability of rapid methods to detect E. coli O157:H7 [abstract]. 2011 Beef Industry Safety Summit, Dallas, TX. March 2-4, 2011. 2011 Beef Industry Safety Summit Research Update. Abstract No. 1.
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Inoculation of beef with low concentrations of Escherichia coli O157:H7 and examination of factors that interfere with its detection by culture isolation and rapid methods
- (Peer Reviewed Journal)
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Bosilevac, J.M., Kalchayanand, N., Schmidt, J.W., Shackelford, S.D., Wheeler, T.L., Koohmaraie, M. 2010. Inoculation of beef with low concentrations of Escherichia coli O157:H7 and examination of factors that interfere with its detection by culture isolation and rapid methods. Journal of Food Protection. 73:2180-2188.
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ARS News Articles
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