|Title:||Pathogen Mitigation in Livestock and Red Meat Production|
Objective 1: Develop and validate intervention strategies that reduce or eliminate foodborne pathogens at the animal and processing levels.
Objective 2: Determine and validate detection methods for foodborne pathogen colonization and contamination at various stages in the production of red meat.
Objective 3: Examine host pathogen interactions with an emphasis on host-specific determinants of pathogen colonization.
The research to be conducted in this project will focus on Shiga-toxin producing E. coli (STEC) and Salmonella at multiple stages of the beef production continuum and contains both basic and applied aspects. The research objectives have been divided into classifications of antimicrobial intervention, detection methodology, and host-pathogen interaction. Antimicrobial interventions to be investigated include applications for the live animal and for carcasses during harvest. Feed supplements will be studied as a means of reducing E. coli O157:H7 in feedlot cattle. Feed supplements are more easily administered than other potential preharvest interventions, such as vaccines, and may provide cross protection against a variety of pathogens. As the hide has been shown to be the source of carcass contamination at processing, any reduction in hide pathogen load should result in lower carcass contamination rates. Thermal dehairing will be investigated as a means to sanitize the cattle hide prior to hide removal. Work will be done to evaluate application of bacteriophage to the hide of the live animal just prior to entrance into the processing plant as an additional step to reduce carriage of E. coli O157:H7 on the animal’s hide. Basic research to model the colonization of E. coli O157:H7 at the bovine recto-anal junction will allow for in vitro assay development to identify direct methods of colonization disruption and mitigation to reduce or eliminate the pathogen from the gastrointestinal tract of cattle. Non-O157 STEC are becoming an increasing burden on beef production with potential regulatory policy based on these organisms. The project described herein will endeavor to develop and validate methodologies for the detection of non-O157 STEC that will provide the beef industry with more sensitive and specific tools to combat these pathogens. While STEC contamination of beef carcasses occurs predominantly through transfer of the pathogens from the hide of the animal to the carcass as the hide is removed, Salmonella contamination has been shown to reside within the tissues of the animal. Previous work has shown that Salmonella can be isolated from lymph nodes located within meat cuts destined for human consumption. Experiments have been designed to study the dissemination of Salmonella in bovine lymph nodes throughout the animal during an active infection and after clinical symptoms have subsided.
|Funding Source:||United States Department of Agriculture (USDA), Agricultural Research Service (ARS)|
|Institutions:||USDA/ARS - Northern Plains Area|
Wheeler, Tommy Lee
|Project Reports:||2013 Annual Report|
2012 Annual Report
2011 Annual Report
|Pending USDA ARS Publications (NP 108):|
Effects of in-plant interventions on reduction of enterohemorrhagic Escherichia coli and background indicator microorganisms on veal calf hides
ARS (NP 108):
Characterization of E. coli O157:H7 strains resulting from contamination of raw beef trim during high event periods
Arthur TM, Bono JL, Kalchayanand N .
Appl Environ Microbiol. 2014 Jan;80(2):506-14.
Impact of sampling area and location on measurement of indicator organisms during beef carcass interventions
Wang R, King DA, Koohmaraie M, Bosilevac JM .
J Food Prot. 2013 Dec;76(12):2069-73.
Mixed biofilm formation by Shiga Toxin-Producing Escherichia coli and Salmonella enterica Serovar Typhimurium enhanced bacterial resistance to sanitization due to extracellular polymeric substances
Wang R, Kalchayanand N, Schmidt JW, Harhay DM.
J Food Prot. 2013 Sep;76(9):1513-22.
Characterization E.coli 0157:H7 strains isolated from super-shedding cattle
Arthur TM, Ahmed R, Chase-Topping M, Kalchayanand N, Schmidt JW, Bono JL.
Appl Environ Microbiol. 2013 Jul;79(14):4294-303.
The physiologic state of Escherichia coli O157:H7 does not affect its detection in two commercial real-time PCR-based tests
Wang R, Schmidt JW, Arthur TM, Bosilevac JM.
Food Microbiol. 2013 Apr;33(2):205-12.
Resistance of various shiga toxin-producing Escherichia coli to electrolyzed oxidizing water
Ravirajsinh J, Hung Y-C, Bosilevac J.
Food Control. 2013 Apr;30(2):580-4.
Chromogenic agar medium for detection and isolation of Escherichia coli serogroups O26, O45, O103, O111, O121, and O145 from fresh beef and cattle feces
Kalchayanand N, Arthur TM, Bosilevac JM, Wells JE, Wheeler TL.
J Food Prot. 2013 Feb;76(2):192-9.
Detection of Escherichia coli O157:H7 and Salmonella enterica in air and droplets at three U.S. commercial beef processing plants
Schmidt JW, Arthur TM, Bosilevac JM, Kalchayanand N, Wheeler TL.
J Food Prot. 2012 Dec;75(12):2213-8.
Predicting the presence of non-O157 Shiga toxin-producing Escherichia coli in ground beef by using molecular tests for Shiga toxins, intimin, and O serogroups
Bosilevac JM, Koohmaraie M.
Appl Environ Microbiol. 2012 Oct;78(19):7152-5.
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
Kalchayanand N, Arthur TM, Bosilevac JM, Schmidt JW, Wang R, Shackelford SD, Wheeler TL.
J Food Prot. 2012 Jul;75(7):1207-12.
Efficacy of hypobromous acid as a hide-on carcass antimicrobial intervention
Schmidt JW, Wang R, Kalchayanand N, Wheeler TL, Koohmaraie M.
J Food Prot. 2012 May;75(5):955-8.
Microbiological analysis of bovine lymph nodes for the detection of Salmonella enterica
Brichta-Harhay DM, Arthur TM, Bosilevac JM, Kalchayanand N, Schmidt JW, Wang R, Shackelford SD, Loneragan GH, Wheeler TL.
J Food Prot. 2012 May;75(5):854-8.
Prevalence, enumeration, serotypes, and antimicrobial resistance phenotypes of salmonella enterica isolates from carcasses at two large United States pork processing plants
Schmidt JW, Brichta-Harhay DM, Kalchayanand N, Bosilevac JM, Shackelford SD, Wheeler TL, Koohmaraie M.
Appl Environ Microbiol. 2012 Apr;78(8):2716-26.
Detection methods and intervention strategies for shiga toxin-producing E. coli in beef - (Abstract Only)
Kalchayanand, N., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L. 2012. Detection methods and intervention strategies for shiga toxin-producing E. coli in beef [abstract]. Annual Meeting of the Institute of Food Technologists. 061-01:52.
Efficacy of ultraviolet light (UV) and UV-ozone as an intervention to reduce pathogens-contaminated fresh beef - (Abstract Only)
Kalchayanand, N., Bosilevac, J.M., Wheeler, T.L. 2012. Efficacy of ultraviolet light (UV) and UV-ozone as an intervention to reduce pathogens-contaminated fresh beef.[Abstract] Annual Meeting of the Institute of Food Technologists.June 25-28, 2012, Las Vegas, Nevada. Abstract 035-71:25.
Analysis of E. coli O157:H7 strains isolated from raw beef contamination events - (Abstract Only)
Arthur, T.M. 2012. Analysis of E. coli O157:H7 strains isolated from raw beef contamination events [abstract]. 2012 Beef Industry Safety Summit. Abstract No. 11.
Characterization of E. coli O157:H7 strains associated with super-shedding cattle - (Abstract Only)
Arthur, T.M. 2012. Characterization of E. coli O157:H7 strains associated with super-shedding cattle [abstract]. 2012 Beef Industry Safety Summit. Abstract No. 1.
Prevalence and characterization of non-O157 Shiga toxin-producing Escherichia coli isolated from feedlot and cull dairy and beef herd cattle - (Abstract Only)
Accepted Publication (31-Jan-12)
Salmonella in lymph nodes of cattle presented for harvest - (Abstract Only)
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.
Non-O157 Shiga toxin-producing Escherichia coli: prevalence associated with meat animals and controlling interventions - (Proceedings)
Kalchayanand, N., Arthur, T.M., Bosilevac, J.M., Wheeler, T.L. 2012. Non-O157 Shiga toxin-producing Escherichia coli: prevalence associated with meat animals and controlling interventions. Proceedings of American Meat Science Association 64th Annual Reciprocal Meat Conference, June 19-22, 2011, Kansas State University, Manhattan Kansas. p.1-9.
|Food Safety Categories:||Sanitation and Pathogen Control|
Government Policy and Regulations
|Farm-to-Table categories:||Food processing|
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