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Tong Zhao

Associate Research Scientist
  • Center for Food Safety

Overview of Research Program

Detection and characterization of bacterial pathogens in food including E. coli O157:H7. Salmonella, Listeria monocytogenes, Campylobacter, Yersinia pestis, and Mycobacterium.

Ecology and reduction of carriage of Escherichia coli O157:H7 in cattle

Development of probiotic/competitive exclusion bacteria to reduce/eliminate carriage of E. coli O157:H7 by cattle and prevalence of L. monocytogenes in processing plants

Patents

Doyle, M.P. and T. Zhao. May 14, 2014. Composition and method for inhibition of microorganisms. U.S.A. Patent # 8,440,448.

Doyle, M.P. and T. Zhao. March 20, 2012. Control of enterohemorrhagic E. coli in farm animal drinking water. U.S.A. Patent # 8,137,705.

Doyle, M.P. and T. Zhao. August 18, 2009. Composition and method for inhibition of microorganisms. U.S.A. Patent # 7,575,744.

Doyle, M.P. and T. Zhao. March 17, 2009. Composition and method for inhibition of microorganisms. European Patent Office # P713476EPPCT/DE.

Doyle, M. P., T. Zhao, B. G. Harmon, and C. A. Brown. November 5, 2003. Control of enterohemorrhagic E. coli O157:H7 in cattle by probiotic bacteria. China Patent No. ZL 98808111.3.

Doyle, M. P., T. Zhao, B. G. Harmon, and C. A. Brown. January 10, 2002. Control of enterohemorrhagic E. coli O157:H7 in cattle by probiotic bacteria. New Zealand Patent No. 502420.

Doyle, M. P., T. Zhao, B. G. Harmon, and C. A. Brown. October 12, 1999. Control of enterohemorrhagic E. coli O157:H7 in cattle by probiotic bacteria. U.S.A. Patent #5,965,128.

Publications

(2010 - present)

Tong, C., M. Scherman, F. Diez-Gonzalez, and J. D. Rossbach. 2017. Food safety risks of leafy greens from small-acreage farms in Minnesota. J. Ext. 55: 4RIB4

Olszewska, M.A., T. Zhao, and M.P. Doyle. 2016. Inactivation and induction of sublethal injury of Listeria monocytogenes in biofilm treated with various sanitizers.  Food Control 70:371-3793.

Zhao, T., L. Wang, P. Zhao, J. Yuan, G. Richburg, and M.P. Doyle. 2016. Reduction of Shiga toxin-producing E. coli and Salmonella Typhimurium on cattle hides by spray treatment with "Fit-L" (levulinic acid plus sodium dodecyl sulfate). MOJ Food Processing & Technology. 2(5):1-7.

Zhao, T. 2016. Biofilm formation of foodborne pathogens and their control in food processing facilities. Food: Microbiology, Safety & Hygiene. 1(2):100.

Doyle, M.P., M.C. Erickson, W. Alali, J. Cannon, X. Deng, Y. Ortega, M.A. Smith, and T. Zhao. 2015. Food industry's current and future role in preventing microbial foodborne illness within the United States. Clin. Infect. Dis. 61:252-259.

Chen, D., T. Zhao, and M.P. Doyle. 2015. Control of pathogens in biofilms on the surface of stainless steel by levulinic acid plus sodium dodecyl sulfate.  Int. J. Food Microbiol. 207:1-7.

Chen, D., T. Zhao, and M.P. Doyle. 2015. Single- and mixed-species biofilm formation by Escherichia coli O157:H7 and Salmonella, and their sensitivity to levulinic acid plus sodium dodecyl sulfate.  Food Control 57:48-53.

Chen, D., T. Zhao, and M.P. Doyle. 2014. Transfer of foodborne pathogens during mechanical slicing and their inactivation by levulinic acid-based sanitizer on slicers.  Food Microbiol. 38:263-269.

Zhao, T., P. Zhao, D. Chen, R. Jadeja, Y.C. Hung, and M.P. Doyle. 2014. Reductions of Shiga toxin-producing Escherichia coli and Salmonella Typhimurium on beef trim by lactic acid, levulinic acid, and sodium dodecyl sulfate treatments. J. Food Prot. 77:528-537.

Aydin, A., J.L. Cannon, T. Zhao, and M.P. Doyle. 2013. Efficacy of a levulinic acid plus sodium dodecyl sulfate (SDS)-based sanitizer on inactivation of influenza A virus on eggshells.  Food Environ. Virol. 5:215-219.

Zhao, T., T. Podtburg, P. Zhao, D. Chen, D.A. Baker, B. Cords, and M.P. Doyle. 2013. Reduction by competitive bacteria of Listeria monocytogenes in biofilms and Listeria sp. in floor drains in a ready-to-eat poultry processing plant. J. Food Prot. 76:601-607.

Zhao, T., P. Zhao, and M.P. Doyle. 2012. Detection and isolation of Yersinia pestis without fraction-1 antigen by monoclonal antibody in foods and water. J. Food Prot. 75:1555-1561.

Cannon, J.L., A. Aydin, A.N. Mann, S.L. Bolton, T. Zhao, and M.P. Doyle. 2012. Efficacy of a levulinic acid plus sodium dodecyl sulfate-based sanitizer on inactivation of human norovirus surrogates.  J. Food Prot. 75:1532-1535.

Wang, B. Y., J. Hong, S. G. Ciancio, T. Zhao, and M. P. Doyle. 2012.  A novel formulation effective in killing oral biofilm bacteria. J. Int. Acad. Periodontology. 14:56-61.

Zhao, T., P. Zhao, J.L. Cannon, and M.P. Doyle. 2011. Inactivation of Salmonella in biofilms and on chicken cages and preharvest poultry by levulinic acid and sodium dodecyl sulfate.  J. Food Prot. 74:2024-2030.

Zhao, T., P. Zhao, and M.P. Doyle. 2010. Inactivation of Escherichia coli O157:H7 and Salmonella Typhimurium DT104 on alfalfa seeds by levulinic acid and sodium dodecyl sulfate. J. Food Prot. 73:2010-2017.