2004 - present Associate Professor & Extension Specialist, Virginia Tech; Blacksburg, VA
1998 - 2004 Assistant Professor & Extension Specialist, Virginia Tech; Blacksburg, VA
1996 - 1997 Manager of Microbiology, Nestlé USA, Dublin, OH
1989 - 1994 Graduate Teaching Assistant, Virginia Tech, Blacksburg, VA
1983 - 1989 Chemist, U.S. Food and Drug Administration, Los Angeles, CA
Current Teaching Responsibilities
Global Food Laws and Regulations (graduate), biannually, 2000-present
Applied Food Microbiology and Sanitation, (graduate) biannually, 2007-present
Recently Completed Theses and Dissertations Directed:
Wu, J. (2014) Inhibiting Listeria monocytogenes, Vibrio parahaemolyticus and Morganella morganii with aqueous methanol extracts of Punica granatum and Galla chinensis (co-advised with M. Jahncke)
Al-Shuniaber, M. (2014) Risk analysis based on performance criteria: a food safety control system and decision-making tool to control Salmonella from whole broilers.
Concha-Meyer, A. (2013) Survival of Listeria monocytogenes on blueberries (Vaccinium corymbosum) and shelf life determination under controlled atmosphere storage.
Saucedo Alderete, R. (2013) Post-harvest spray treatments to reduce Salmonella contamination on cantaloupe surfaces.
Masri, H. (2013) Optimizing sample plans to improve microbiological safety in a food processing plant.
Waldron, C. (2013) Efficacy of delmopinol in preventing the attachment of Campylobacter jejuni to chicken, stainless steel and high-density polyethylene.
Schroeder, M. (2012) Association of Campylobacter spp. levels between chicken grow-out environmental samples and processed carcasses
Johnson, A. (2010) Airborne Campylobacter spp. in a poultry processing plant.
O'Connor, S. (2009) Development and evaluation of food safety signs.
Kuntz, T. (2009) Campylobacter jejuni and Salmonella spp. detection in chicken grow-out houses by environmental sampling methods.
Baker, R. (2008) Fluorescent microspheres as surrogates for Salmonella enterica serotype Typhimurium in recovery studies from stainless steel.
Recent Peer-Reviewed Publications
Dev Kumar, G., Williams, R., Sumner, S., Eifert, J. 2014. Effect of Ozone and Ultraviolet Light on Listeria monocytogenes Populations in RTE Chill Brines. Food Control. Under review.
Concha-Meyer, A., Eifert, J., Williams, R., Marcy, J., Welbaum, G. 2014. Shelf life determination of fresh blueberries (Vaccinium corymbosum) stored under controlled atmosphere and ozone. International Journal of Food Science. In press.
Concha-Meyer, A., Eifert, J., Williams, R., Marcy, J., and Welbaum, G. 2014. Survival of Listeria monocytogenes on fresh blueberries (Vaccinium corymbosum) stored under controlled atmosphere and ozone. J. Food Prot. 77(5): 832-836.
Schroeder, M., Eifert, J., Ponder M. and Schmale, III, D. 2014. Association of Campylobacter spp. levels between chicken grow-out environmental samples and processed carcasses. Poul. Sci. 93: 734-741.
Maitland, J., Boyer, R., Gallagher, D., Duncan, S., Bauer, N., Kause, J., and Eifert, J. 2013. Tracking cross contamination transfer dynamics at a mock retail deli market using GloGermTM. J. Food Prot. 76(2): 272-282.
Aviles, B., Klotz, C., Eifert, J., Williams, R. and Ponder, M. 2013. Biofilms promote survival and virulence of Salmonella enterica sv. Tennessee during prolonged dry storage and after passage through an in vitro digestion system. Int. J. Food Microbiol. 162(3): 252-259.
Robertson, L., Boyer, R., Chapman, B., Eifert, J., Villalba, A. and Franz, N. 2013. Educational needs assessment and practices of grocery store food handlers through survey and observational data collection. Food Cont. 34(2):707-713.
Parikh, P., Williams, R., Mallikarjunan, P., Eifert, J. and Marcy, J. 2012. Control of Listeria monocytogenes in recycled chill brine using ultraviolet light and antimicrobial agents. J. Food Saf. 32(2): 169-175.
Parikh, P., Williams, R., Mallikarjunan, P., Eifert, J. and Marcy, J. 2011. Concurrent use of ultraviolet light and citric acid, dimethyl dicarbonate, or hydrogen peroxide to inactivate Listeria monocytogenes in chill brine. J. Food Saf. 31(4): 530-537.
Maitland, J., Boyer, J., Eifert, J. and Williams, R. 2011. High pressure processing reduces Salmonella enterica in whole and diced tomatoes. Int. J. Food Microbiol. 149(2):113-117.