Education

• Assistant Professor of Swine Medicine
• B.S., 1985, Iowa State University
• D.V.M., 1986, Iowa State University
• Ph.D., 1994, University of Minnesota

Research

Epidemiology of food-borne disease; control of Salmonella in swine; ecology of antimicrobial resistance in food-borne bacteria; biological and financial consequences of infectious disease; sustainability of farm production; development of integrated systems to enhance food production and food safety. The research program in our laboratory bridges gaps between basic sciences and clinical sciences, with the goal to provide cutting edge solutions that are biologically sound and economically achievable. Our mission is to provide pork producers and others in the pork production chain with sustainable solutions to critical health related problems in swine production. We work toward this goal through the application of bacteriologic, immunologic and epidemiologic tools, including a strong focus on analytic epidemiology, both observational and experimental. The current primary pathogen of interest in the lab is Salmonella enterica, ranked as the most important foodborne pathogen of swine in the Unites States. Through field-based and experimental studies of the pathogen and its swine host we are developing methods to reduce the potential for spread to humans via the food chain.

Responsibilities

Swine production medicine training for DVM students, support for the Wisconsin pork industry

Clinical Interests

Epidemiology and control of infectious diseases in growing pigs Economic and biological consequences of disease Integration of health and production Capturing added value of high health production

Recent Publications

Bahnson, P.B., Fedorka-Cray, P.J., Ladely, S.R., Mateus-Pinilla, N.E. Herd-level risk factors for Salmonella enterica subsp. enterica culture prevalence in U.S. market pigs. In press, Prev. Vet. Med.

Gebreyes, W.A., Morrow, W.E.M. Bahnson, P.B., Funk, J.A., and Thakur, S. Campylobacter prevalence and antimicrobial resistance in swine reared in antimicrobial-free and conventional production systems. In: Proc., 6th International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork, September 6-9, 2005, Rohnert Park, California.

Bahnson, P.B., Snyder, C. and Omran, L.M. Salmonella enterica in superficial cervical (prescapular) and ileocecal lymph nodes of slaughtered pigs. J. Food Protect., 2006, 69:925-927.

Bahnson, P.B., Gebreyes, W.A., Funk, J.A., and Morrow, W.E.M. Salmonella prevalence in pigs reared on farms with and without antimicrobials. In: Proc., 6th International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork, September 6-9, 2005, Rohnert Park, California.

Bahnson P.B., Damman D.J., Isaacson R.E., Miller G.Y., Weigel, R.M., and Troutt H.F. Prevalence and serovars of Salmonella enterica isolated from ileocecal lymph nodes of market pigs reared in selected Midwest US swine herds. J. Swine Health and Production. 2006, 14:182-188.

Bahnson P.B., Kim J.Y., Weigel R.M., Miller G.Y., and Troutt H.F. Associations between on-farm and slaughter plant detection of Salmonella in market-weight pigs. Journal of Food Protection. 2005, 68:246-251.

USA-2003-Swine-Veterinary-Educator-Team. Educating the next generation of swine veterinarians: Needs and Strategies. J. Am. Vet. Med. Assoc. 2004, 224:1422-1425.1

Patchanee, P., Bahnson P.B., Crenshaw, T.D. 2005. Chlorate and disinfectant modify Salmonella enterica shedding in weaned pigs. In: Proc., 6th International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork, September 6-9, 2005, Rohnert Park, California.

Moreau I.A., Miller GY, and Bahnson P.B. Effects of Mycoplasma hyopneumoniae vaccine on pigs naturally infected with M. hyopneumoniae and Porcine Reproductive and Respiratory Syndrome virus. Vaccine. 2004;22:2329-2333. §

Gebreyes, W.A., Bahnson, P.B., Funk, J.A., Morrow, W.E.M., Thakur, S. Prevalence and antibiotic resistance in Campylobacter from antimicrobial free and conventional swine herds. In: Proceedings of the National Pork Boar Pork Quality and Safety Summit, August 17-18, 2004, West Des Moines, Iowa.

Funk, J.A., Bahnson, P.B., Gebreyes, W.A., Morrow, W.E.M. Yersinia prevalence in antibiotic free and conventionally reared swine. In: Proceedings of the National Pork Boar Pork Quality and Safety Summit, August 17-18, 2004, West Des Moines, Iowa.

Bahnson, P.B., Gebreyes, W.A., Funk, J.A., Morrow, W.E.M. Salmonella detected in pigs reared with and without antimicrobials. In: proceedings of the National Pork Boar Pork Quality and Safety Summit, August 17-18, 2004, West Des Moines, Iowa.

Bahnson, P.B., Omran L.M., Fedorka-Cray, P.J, Ladely S.R. and Troutt, H.F. Repeated observations on the Salmonella culture status of Midwest U.S. herds, in: Proceedings of the 5th International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork, October 1-4, 2003, Hersonissos, Heraklion, Crete-Greece, p 248-250.

Bahnson, P.B., Teferedegne, B. and White, BA. Tetracycline resistance genes in Salmonella from growing pigs and their relationship to antimicrobial use and resistance to other antimicrobials. In: Proceedings of the 5th International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork, October 1-4, 2003, Hersonissos, Heraklion, Crete-Greece, p. 188-191.

Barber, D.A., Bahnson, P.B., Miller, G.Y. and Michalak, M.M. Ideas and practices related to preharvest food safety for large Illinois swine producers. Dairy, Food and Environmental Sanitation. 2002, 22:970-975.

Barber, D.A., Bahnson, P.B., Isaacson, R., Jones, C.J., and Weigel, R.M. Distribution of Salmonella in swine production ecosystems. Journal of Food Protection. 2002, 65:1861–1868.

Miller, G.Y., Song, Y. and Bahnson, P.B. An economic model for estimating batch finishing system profitability with an application in estimating the impact of preventive measures for porcine respiratory disease complex. Journal of Swine Health and Production 2001, 9:169-177.

Michalak, M.M., Bahnson, P.B. and Miller, G.Y. On farm food safety: Attitudes and beliefs of swine practitioners. Journal of Swine Health and Production. 2001, 9:6;275-279.

Bahnson, P.B., Michalak, M.M. and Miller, G.Y. Pork producers attitudes, knowledge and production practices that relate to on-farm food safety. J. Food Protect. 2001, 64:1967–1972.