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University of Minnesota
Department of Food Science and NutritionCollege of Food, Agricultural and Natural Resource Sciences
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  Francisco Diez-Gonzalez, Ph.D Photo of Francisco Diez-Gonzales
 

Associate Professor
Department of Food Science and Nutrition
Address: 258 ABLMS
Phone: (612) 624-9756
Fax: (612) 625-5272
fdiez@umn.edu



  Research Expertise:
 
  • Food safety microbiology
  • Foodborne pathogens
  • Safety of fresh fruits and vegetables
  • Pre-harvest control of pathogenic E. coli
  • Bioterroism agents
  • Safety of organic foods
  Resident and Outreach Teaching:
 
  • FScN 1102 Food: Safety, Risks and Technology
  • FScN 4121 Food Microbiology & Fermentations
  • FScN 4122 Lab Methods in Food Microbiology & Fermenations
  • FScN 8318 Current Issues in Food Science
  • PubH 7100-103 Applications of Microbiology to Food Safety Monitoring
  Selected Scholarship:
 

Cho, S., F. Diez-Gonzalez, C. P. Fossler, S. J. Wells, C. W. Hedberg, J. B. Kaneene, P. L. Ruegg, L. D. Warnick, and J. B. Bender.  2007. Antimicrobial susceptibility of shiga-toxin producing Escherichia coli isolated from organic and conventional dairy cattle farms, and county fairs in Minnesota. Food. Path. Dis. 4:178-186.

Diez-Gonzalez, F. 2007. Effects of organic, low input and conventional livestock husbandry methods on the microbiological safety of ruminant (dairy, beef, sheep) production systems. In: C. Leifert (ed.), Handbook of Organic Food Safety and Quality, Woodhead Publishing Ltd. 

Diez-Gonzalez, F. 2007. Use of probiotics for livestock. Curr. Issues. Int. Microbiol. 8:15-24.

Diez-Gonzalez, F., D. Belina, T. P. Labuza, and A. Pal. 2007. Modeling the growth of Listeria monocytogenes based on time-to-detect model in culture media and frankfurters. Intl. J. Food Microbiol. 113:277-283.

Hilgren. J., K. M. J. Swanson, F. Diez-Gonzalez, and B. Cords. 2007. Inactivation of Bacillus anthracis spores by liquid biocides in the presence of food residue. Appl. Environ. Microbiol. 73: 6370-6377.

Mukherjee, A., D. Speh, and F. Diez-Gonzalez. 2007. Variation in prevalence and persistence of Escherichia coli in pre-harvest fruits and vegetables collected during the harvest months from Minnesota and Wisconsin farms. Int. J. Food Microbiol. doi:10.1016/j.ijfoodmicro.2007.09.007.

Pal, A. 2007. Shelf life evaluation of ready-to-eat meat and poultry products based on Listeria monocytogenes growth. Ph. D. Dissertation, University of Minnesota, p. 271.

Cho, S., J. B. Bender, F. Diez-Gonzalez, C. P. Fossler, C. W. Hedberg, J. B. Kaneene, P. L. Ruegg, L. D. Warnick, and S. J. Wells.  2006.  Prevalence and characterization of Escherichia coli O157 isolates from Minnesota dairy farms and county fairs. J. Food Prot. 69:252-259.

Cho, S., F. Diez-Gonzalez, C. P. Fossler, S. J. Wells, C. W. Hedberg, J. B. Kaneene, P. L. Ruegg, L. D. Warnick, and J. B. Bender.  2006. Prevalence of shiga toxin-encoding bacteria and shiga toxin-producing Escherichia coli isolates from dairy farms and county fairs. Vet. Microbiol. 118:289-298.

DiLorenzo, N., F. Diez-Gonzalez, A. DiCostanzo. 2006. Effects of feeding polyclonal antibody preparations on rumen bacteria populations and pH of steers fed high-grain diets. J. Animal. Sci. 84:2178-2185.

Mukherjee, A., S. Cho, J. Scheftel, S. Jawahir, K. Smith, and F. Diez-Gonzalez. 2006. Soil Survival of Escherichia coli O157:H7 Acquired by a child from garden soil recently fertilized with cattle manure. J. Appl. Microbiol. 101:429-436.

Mukherjee, A., D. Speh, A. T. Jones, K. M.Buesing, L. T. L. Xiong, and F. Diez-Gonzalez. 2006. Longitudinal microbiological survey of fresh produce grown by farmers in the Upper Midwest. J. Food Prot. 69:1928-1936.

Xu, Sa., T. P. Labuza, and F. Diez-Gonzalez. 2006. Thermal inactivation of Bacillus anthracis spores in milk. Appl. Environ. Microbiol. 72:4479-4483.

Diez-Gonzalez, F., 2005. The use of diet to control pathogens in animals. In: J. Sofos (ed.), Raw Material Safety: Meat, Woodhead Publishing Ltd.

Diez-Gonzalez, F., and Y. Karaibrahimoglu. 2005. Rapid analysis techniques in food microbiology. In: S. Otles (ed.), Methods of Analysis of Food Components and Additives, CRC Press.

Diez-Gonzalez, F., and G. P. Schamberger. 2005. Use of probiotics in pre-harvest food safety applications. In: I. Goktepe and V. Juneja (eds.), Probiotics in Food Safety and Human Health, Marcel Dekker.

Jacobs, J. L., F. Diez-Gonzalez, M. D. Stern, and R. L. Phillips. 2005. Detection of transgenic maize Cry1Ab protein subjected to ruminal digestion. J. Ani. Feed Sci. 14:655-664.

Labuza, T. P., F. Diez-Gonzalez, and D. Belina, 2005. Alternatives to safety-based shelf life dating. Food Prot. Trends 25:53-56.

Schamberger, G. P., and F. Diez-Gonzalez. 2005. Assessment of Resistance to Colicinogenic Escherichia coli by E. coli O157:H7 Strains. J. Appl. Microbiol. 98:245-252.

Diez-Gonzalez, F. and Karaibrahimoglu, Y. 2004. Comparison of the glutamate-, arginine- and lysine-dependent acid resistance systems in Escherichia coli O157:H7. J. Appl. Microbiol. 96:1237-1244.

Mukherjee, A., Speh, D., Dyck, E. A., and Diez-Gonzalez, F. 2004. Pre-harvest evaluation of coliforms, Escherichia coli, Salmonella and E. coli O157:H7 in organic and conventional produce grown by Minnesota farmers. J. Food Prot. 67:894-900.

Nandiwada, L. S., Schamberger, G. P., Schafer, H. W. and Diez-Gonzalez, F. 2004. Characterization of a novel E2-Type Colicin and its application to treat alfalfa seeds to reduce Escherichia coli O157:H7. Intl. J. Food Microbiol. 93:267-279.

Park, G. W., and Diez-Gonzalez, F. 2004. A novel glutamate-dependent acid resistance among strains belonging to the Proteeae tribe of Enterobacteriaceae. FEMS Microbiol. Lett. 237:303-309.

Schamberger, G. P., and Diez-Gonzalez, F. 2004. Characterization of colicinogenic Escherichia coli strains inhibitory to enterohemorrhagic E. coli. J. Food Prot. 67:486-492.

Schamberger, G. P., Phillips, R. L., Jacobs, J. L. and Diez-Gonzalez, F. 2004. Reduction of Escherichia coli O157:H7 in cattle by feeding colicin E7-producing E. coli. Appl. Environ. Microbiol. 70:6053-6060.

Park, G. W., and F. Diez-Gonzalez. 2003 Utilization of carbonate and ammonia-based treatments to eliminate Escherichia coli O157:H7 and Salmonella Typhimurium DT104 from cattle manure. J. Appl. Microbiol. 94:675-685.

Schamberger, G. P., and F. Diez-Gonzalez. 2002. Selection of recently isolated colicinogenic Escherichia coli strains inhibitory against E. coli O157:H7. J. Food Prot. 9:1381–1387.

  Leadership and Service:
 
  • 2005-08 University Faculty Senator
  • 2006-08 Institutional Biosafety Committee member
  • 2002-04 CHE Honors and Awards Committee chair
  • 2001-08 FScN Faculty Secretary
  • 2000-08 FScN Food Science Club Advisor 
  Awards:
 
  • New Career Excellence Award, College of Human Ecology, University of Minnesota, 2004.
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