Objective: 1. Identify the ecological and environmental factors, as well as critical points, that affect pathogen occurrence, survival, fate, and transport in cattle and swine production facilities, manure, and surrounding environments.
Objective 2. Develop and evaluate intervention strategies that reduce or eliminate the occurrence, persistence, or movement of foodborne pathogens among food animals, their environment, and potential surrounding production environments.
Approach: The overall goal of this project is to reduce the risk of human foodborne illness, by providing scientific information that can be used to reduce or eliminate the transmission of zoonotic pathogens from animal manure to food, water, and the environment. Primary targets of the work include pathogenic strains of Escherichia coli (including non-O157 Shiga-toxigenic E. coli), Salmonella spp., and Campylobacter spp. in cattle and swine. Approaches for reducing these pathogens include the reduction of pathogen colonization and shedding by livestock, as well as the reduction of pathogens shed and present in the manure and production environment. Exploitable factors, including biological, environmental, and managerial factors, which affect the occurrence, survival, or transmission of pathogens in cattle and/or swine manure will be identified, then manipulated and evaluated to determine the impact on pathogens. Strategies and interventions to reduce the dissemination of foodborne pathogens in cattle and swine manure or production environments will be developed and evaluated. Approaches will include the use of dietary amendments, manure additives, and waste management systems, as well as other intervention strategies that may be suggested by information gathered in experiments. Approaches that are both effective at reducing foodborne pathogens and environmentally safe under animal production practices will be identified. Expected outcomes are scientific information and procedures that will be used to reduce or eliminate zoonotic foodborne pathogens both in livestock and their manure, thus contributing to a safer food and water supply and a lower risk of human foodborne illness.
Investigation of bacterial diversity in the feces of cattle fed different diets
Kim MS, Kim J, Kuehn LA, Bono JL, Berry ED, Kalchayanand N, Freetly HC, Benson AK, Wells J
J Animal Sci. 2014 Feb;92(2):683-94.
Development and model testing of antemortem screening methodology to predict required drug withholds in heifers
Jones SA, Salter RS, Goldsmith T, Quintana J, Rapnicki P, Shuck K, Wells JE, Schneider MJ, Griffin D.
J Food Prot. 2014 Feb;77(2):292-8.
Fate of naturally occurring Escherichia coli O157:H7 and other zoonotic pathogens during minimally managed bovine feedlot manure composting processes
Berry ED, Millner PD, Wells JE, Kalchayanand N, Guerini MN.
J Food Prot. 2013 Aug;76(8):1308-21.
A framework for developing research protocols for evaluation of microbial hazards and controls during production that pertain to the application of untreated soil amendments of animal origin on land used to grow produce that may be consumed raw
Harris LJ, Berry ED, Blessington T, Erickson M, Jay-Russell M, Jiang X, Killinger K, Michel FC, Millner PD, Schneider K, Sharma M, Suslow TV, Wang L, Worobo RW
J Food Prot. 2013 Jun;76(6):1062-84.
Effects of antimicrobials fed as dietary growth promoters on faecal shedding of Campylobacter, Salmonella and shiga-toxin producing Escherichia coli in swine
Wells JE, Kalchayanand N, Berry ED, Oliver WT.
J Appl Microbiol. 2013 Feb;114(2):318-28.
Effects of different fresh-cut forages and their hays on feed intake, digestibility, heat production, and ruminal methane emission by Boer x Spanish goats
Puchala R, Animut G, Patra AK, Detweiler GD, Wells JE, Varel VH, Sahlu T, Goetsch AL.
J Anim Sci. 2012 Aug;90(8):2754-62.
Methane emissions by goats consuming Sericea lespedeza at different feeding frequencies
Puchala R, Animut G, Patra AK, Detweilera GD, Wells JE, Varel VH, Sahlu T, Goetsch AL.
Anim Feed Sci Tech. 2012 Jul 20;175(1):76-84.
Soil solarization reduces Escherichia coli O157:H7 and total Escherichia coli on cattle feedlot pen surfaces
Berry ED, Wells JE.
J Food Prot. 2012 Jan;75(1):7-13.
Impact of reducing the level of wet distillers grains fed to cattle prior to harvest on prevalence and levels of Escherichia coli O157:H7 in feces and on hides
Effect of proximity to a cattle feedlot on Escherichia coli O157:H7 contamination of leafy greens and evaluation of the potential for bioaerosol and pest fly transmission - (Abstract Only)
Berry, E.D., Wells, J., Durso, L.M., Bono, J.L., Friesen, K.M., Woodbury, B.L., Kalchayanand, N., Norman, K.N., Suslow, T.V., Lopez-Velasco, G., Millner, P.D. 2014. Effect of proximity to a cattle feedlot on Escherichia coli O157:H7 contamination of leafy greens and evaluation of the potential for bioaerosol and pest fly transmission. [Abstract]. Western Food Safety Summit, May 8-9, 2014, Salinas, CA. poster session.
Escherichia coli O157:H7, diet, and fecal microbiome in beef cattle - (Proceedings)
Diet, fecal microbiome and Escherichia coli O157:H7 shedding in beef Cattle - (Abstract Only)
Wells, J., Kim, M.S., Kuehn, L.A., Benson, A.K. 2013. Diet, fecal microbiome and Escherichia coli O157:H7 shedding in beef Cattle.[abstract] Journal of Animal Science Supplement. 96 (E-Supplement 2):631.
Investigation of microbial diversity in the feces of cattle fed different diets - (Abstract Only)
Kim, M.S., Kim, J., Kuehn, L.A., Bono, J.L., Berry, E.D., Kalchayanand, N., Freetly, H.C., Benson, A.K., Wells, J. 2013. Investigation of microbial diversity in the feces of cattle fed different diets.[abstract] Journal of Animal Science Supplement. 91 (E-Supplement 2): 235.
Results of anti-mortem screening methodology to predict prescribed drug withholding periods for flunixin and ceftiofur in heifers - (Proceedings)
Salter, R., Jones, S., Wells, J., Griffin, D., Shuck, K., Goldsmith, T., Rapnicki, P. 2012. Results of anti-mortem screening methodology to predict prescribed drug withholding periods for flunixin and ceftiofur in heifers. American Association of Bovine Practitioners Proceedings. September 20-22, 2012. Montreal, Canada. Research Summary No. 225.
Development and model testing of anti-mortem screening methodology to predict prescribed drug withholds in heifers - (Abstract Only)
Salter, R., Jones, S., Goldsmith, T., Quintana, J., Rapnicki, P., Shuck, K., Wells, J., Griffin, D. 2012. Development and model testing of anti-mortem screening methodology to predict prescribed drug withholds in heifers. In: Proceedings of International Association for Food Protection, July 22-25, 2012, Providence, Rhode Island. Poster P3-13.