College of Agricultural Sciences Personnel Profile
Personnel Photo
Ifigenia Geornaras
Associate Professor
Animal Sciences
College of Agricultural Sciences

Animal Sciences Building, Room 221
Phone:
970-491-7128
Education:
  • Ph D, University of the Witwatersrand; Food Microbiology
  • Other, University of the Witwatersrand; Microbiology
  • BS, University of the Witwatersrand; Microbiology and Genetics
Website:
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Yoon, Y., Geornaras, Ifigenia, Mukherjee, A., Belk, Keith E., Scanga, J. A., Smith, G. C., Sofos, John N, Effects of cooking methods and chemical tenderizers on survival of Escherichia coli O157:H7 in ground beef patties Meat Science 95 317-322

Yang, Xiang, Woerner, Dale Ray, Hasty, Joshua Dillon, McCullough, Kathryn Rose, Geornaras, Ifigenia, Sofos, John N, Belk, Keith E., (2016) An evaluation of the effectiveness of FreshCase technology to extend the storage life of whole muscle beef and ground beef Journal of Animal Science 94 11 4911–4920

Yang, Xiang, Woerner, Dale Ray, McCullough, Kathryn Rose, Hasty, Joshua Dillon, Geornaras, Ifigenia, Smith, Gary C, Sofos, John N, Belk, Keith E., (2016) An evaluation of the effectiveness of FreshCase technology to extend the storage life of whole-muscle pork and ground pork sausage. Journal of Animal Science 94 11 4921-4929

Noyes, Noelle Robertson, Yang, Xiang, Linke, Lyndsey M, Magnuson, Roberta J, Cook, Shaun R, Zaheer, Rahat, Yang, Hua, Woerner, Dale Ray, Geornaras, Ifigenia, McArt, Jessica Anne Allerton, Gow, Sheryl P, Ruiz, Jaime, Jones, Kenneth L, Boucher, Christina A, McAllister, Tim A, Belk, Keith E., Morley, Paul S, (2016) Characterization of the resistome in manure, soil and wastewater from dairy and beef production systems Scientific reports 6 24645

Yang, Hua, Carlson, Brandon, Geornaras, Ifigenia, Woerner, Dale Ray, Sofos, John N, Belk, Keith E., (2016) Draft genome sequence of Shiga toxin-negative Escherichia coli O157: H7 strain C1-057, isolated from feedlot cattle Genome announcements 4 2 e00049–16

Luzardo, Santiago, Woerner, Dale Ray, Geornaras, Ifigenia, Hess, Ann Marie, Belk, Keith E., (2016) Effect of packaging during storage time on retail display microbial population of beef strip loins from two different production systems. Journal of Animal Science 94 2614-2623

Noyes, Noelle Robertson, Yang, Xiang, Linke, Lyndsey M, Magnuson, Roberta J, Dettenwanger, Adam, Cook, Shaun, Geornaras, Ifigenia, Woerner, Dale Ray, Gow, Sheryl P, McAllister, Tim A, Yang, Hua, Ruiz, Jaime, Jones, Kenneth L, Boucher, Christina A, Morley, Paul S, Belk, Keith E., (2016) Resistome diversity in cattle and the environment decreases during beef production ELife 5 e13195

Ko, Kyung Yuk, Geornaras, Ifigenia, Byelashov, Oleksandr A, Paik, Hyun-Dong, Kim, Kee-Tae, Sofos, John N, (2016) Thermotolerance of rifampicin-resistant Escherichia coli O157: H7 derivatives and their parental strains in a broth system Journal of Food Safety 36 1 3–10

Noyes, Noelle Robertson, Yang, Xiang, Linke, Lyndsey M, Magnuson, Roberta J, Dettenwanger, A, Cook, S, Geornaras, Ifigenia, Woerner, Dale Ray, Gow, S, McAllister, T, Yang, Hua, Ruiz, Jaime G, Jones, K, Boucher, Christina Anne, Morley, Paul S, Belk, Keith E., (2016) "Use of metagenomic shotgun sequencing technology to detect foodborne pathogens within the microbiome of the beef production chain. " eLife 5 e13195

Luzardo, S, Woerner, Dale Ray, Geornaras, Ifigenia, Engle, Terry E, Delmore, Robert, Hess, Ann Marie, Belk, Keith E., (2016) Effect of packaging during storage time on retail display shelf life of longissimus muscle from two different beef production systems. Journal of animal science 94 6 2624-36

Yang, Xiang, Noyes, Noelle Robertson, Doster, E, Martin, Jennifer, Linke, Lyndsey M, Magnuson, Roberta J, Yang, Hua, Geornaras, Ifigenia, Woerner, Dale Ray, Jones, Kevin, Ruiz, Jaime G, Boucher, Christina Anne, Morley, Paul S, Belk, Keith E., (2016) Use of metagenomic shotgun sequencing technology to detect foodborne pathogens within their microbiome in beef production chain. Applied and environmental microbiology 82 2433-2443

Ko, Kyung Yuk, Geornaras, Ifigenia, Paik, Hyun-Dong, Kim, Kee-Tae, Sofos, John N, (2015) Effects of plant-derived extracts, other antimicrobials, and their combinations against Escherichia coli O157: H7 in beef systems Journal of food protection 78 6 1090–1097

Scott, Brittney Rose, Yang, Xiang, Geornaras, Ifigenia, Delmore, Robert, Woerner, Dale Ray, Adler, J M, Belk, Keith E., (2015) Antimicrobial Efficacy of a Lactic Acid and Citric Acid Blend against Shiga Toxin-Producing Escherichia coli, Salmonella, and Nonpathogenic Escherichia coli Biotype I on Inoculated Prerigor Beef Carcass Surface Tissue. Journal of food protection 78 12 2136-42

Moschonas, G, Geornaras, Ifigenia, Stopforth, J D, Woerner, Dale Ray, Belk, Keith E., Smith, Gary C, Sofos, John N, (2015) Effect of Product Dimensions and Surface Browning Method on Salmonella Contamination in Frozen, Surface-Browned, Breaded Chicken Products Treated with Antimicrobials. Journal of food science 80 12 M2815-21

Scott, Brittney Rose, Yang, Xiang, Geornaras, Ifigenia, Delmore, Robert, Woerner, Dale Ray, Reagan, J O, Morgan, Jeralyn, Belk, Keith E., (2015) Antimicrobial Efficacy of a Sulfuric Acid and Sodium Sulfate Blend, Peroxyacetic Acid, and Cetylpyridinium Chloride against Salmonella on Inoculated Chicken Wings. Journal of food protection 78 11 1967-72

Fouladkhah, Aliyar, Geornaras, Ifigenia, Nychas, George-John, Sofos, John N, (2013) Antilisterial properties of marinades during refrigerated storage and microwave oven reheating against post-cooking inoculated chicken breast meat J. Food Sci. 78 M285-M289

Fouladkhah, Aliyar, Geornaras, Ifigenia, Sofos, John N, (2013) "Biofilm formation by Shiga toxin-producing Escherichia coli and multidrug-resistant and susceptible Salmonella and their inactivation by sanitizers" 100th Annual Meeting of the International Association for Food Protection, July 28-31, Charlotte, NC. Abstract No. P1-171

Fouladkhah, Aliyar, Geornaras, Ifigenia, Sofos, John N, (2013) Biofilm formation of O157 and non-O157 Shiga toxin-producing Escherichia coli and multidrug-resistant and susceptible Salmonella Typhimurium and Newport and their inactivation by sanitizers J. Food Sci. 78 M880-M886

Geornaras, Ifigenia, Toczko, Darren, Sofos, John N, (2013) Effect of age of cook-in-bag delicatessen meats formulated with lactate-diacetate on the behavior of Listeria monocytogenes contamination introduced when opening the packages during storage J. Food Prot 76 1274-1278

Yoon, Yohan, Geornaras, Ifigenia, Mukherjee, Avik, Belk, Keith E., Scanga, John A., Smith, Gary C., Sofos, John N, (2013) Effects of cooking methods and chemical tenderizers on survival of Escherichia coli O157:H7 in ground beef patties Meat Sci. 95 317-322

Fouladkhah, Aliyar, Geornaras, Ifigenia, Yang, Hua, Sofos, John N, (2013) Lactic acid resistance of Shiga toxin-producing Escherichia coli and multidrug-resistant and susceptible Salmonella Typhimurium and Salmonella Newport in meat homogenate Food Microbiol. 36 260-266

Yang, Xiang, Pittman, Curtis I., Perham, Carlie C. , Geornaras, Ifigenia, Sofos, John N, Woerner, Dale Ray, Belk, Keith E., (2013) "Validation of the commercial use of thermal pasteurization combined with a bromine solution as whole carcass antimicrobial intervention when tested at operational parameters" BIFSCO, March 13-15, Dallas, TX.

Skandamis, Panagiotis N, Gounadaki, Antonia S, Geornaras, Ifigenia, Sofos, John N, (2012) Adaptive acid tolerance response of Listeria monocytogenes strains under planktonic and immobilized growth conditions International journal of food microbiology 159 2 160–166

Fouladkhah, Aliyar, Geornaras, Ifigenia, Sofos, John N, (2012) Effects of reheating against Listeria monocytogenes inoculated on cooked chicken breast meat stored aerobically at 7°C Food Protection Trends 32 11 697-704

Simpson Beauchamp, Catherine, Dourou, Dimitra, Geornaras, Ifigenia, Yoon, Yohan, Scanga, John A, Belk, Keith E., Smith, Gary C, Nychas, George-John E, Sofos, John N, (2012) Sanitizer efficacy against Escherichia coli O157: H7 biofilms on inadequately cleaned meat-contact surface materials Food Protection Trends 32 4 173–182

Geornaras, Ifigenia, Yang, Hua, Moschonas, G, Nunnelly, M C, Belk, Keith E., Nightingale, K K, Woerner, Dale Ray, Smith, Gary C, Sofos, John N, (2012) Efficacy of chemical interventions against Escherichia coli O157:H7 and multidrug-resistant and antibiotic-susceptible Salmonella on inoculated beef trimmings. Journal of food protection 75 11 1960-7

Fouladkhah, A, Geornaras, Ifigenia, Yang, Hua, Belk, Keith E., Nightingale, K K, Woerner, Dale Ray, Smith, Gary C, Sofos, John N, (2012) Sensitivity of Shiga toxin-producing Escherichia coli, multidrug-resistant Salmonella, and antibiotic-susceptible Salmonella to lactic acid on inoculated beef trimmings. Journal of food protection 75 10 1751-8

Geornaras, Ifigenia, Yang, Hua, Manios, S, Andritsos, N, Belk, Keith E., Nightingale, K K, Woerner, Dale Ray, Smith, Gary C, Sofos, John N, (2012) Comparison of decontamination efficacy of antimicrobial treatments for beef trimmings against Escherichia coli O157:H7 and 6 non-O157 Shiga toxin-producing E. coli serogroups. Journal of food science 77 9 M539-44

Pittman, C I, Geornaras, Ifigenia, Woerner, Dale Ray, Nightingale, K K, Sofos, John N, Goodridge, Lawrence, Belk, Keith E., (2012) Evaluation of lactic acid as an initial and secondary subprimal intervention for Escherichia coli O157:H7, non-O157 Shiga toxin-producing E. coli, and a nonpathogenic E. coli surrogate for E. coli O157:H7. Journal of food protection 75 9 1701-8

Moschonas, G, Geornaras, Ifigenia, Stopforth, J D, Wach, D, Woerner, Dale Ray, Belk, Keith E., Smith, Gary C, Sofos, John N, (2012) Activity of caprylic acid, carvacrol, ε-polylysine and their combinations against Salmonella in not-ready-to-eat surface-browned, frozen, breaded chicken products. Journal of food science 77 7 M405-11

Moschonas, G, Geornaras, Ifigenia, Stopforth, J D, Wach, D, Woerner, Dale Ray, Belk, Keith E., Smith, Gary C, Sofos, John N, (2012) Antimicrobials for reduction of Salmonella contamination in uncooked, surface-browned breaded chicken products. Journal of food protection 75 6 1023-8

Simpson Beauchamp, C, Dourou, D, Geornaras, Ifigenia, Yoon, Y, Scanga, J A, Belk, Keith E., Smith, Gary C, Nychas, G J, Sofos, John N, (2012) Transfer, attachment, and formation of biofilms by Escherichia coli O157:H7 on meat-contact surface materials. Journal of food science 77 6 M343-7

Adler, J M, Geornaras, Ifigenia, Belk, Keith E., Smith, Gary C, Sofos, John N, (2012) Thermal inactivation of Escherichia coli O157:H7 inoculated at different depths of non-intact blade-tenderized beef steaks. Journal of food science 77 2 M108-14

Geornaras, Ifigenia, Sofos, John N, (2011) "Animal Source Foods (ASFs): Safety of Non-Intact Beef Products" CRC Press/Taylor and Francis 33–36

Shen, Cangliang, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2011) Evaluation of microwave oven heating and salad dressings to control Listeria monocytogenes on diced ham and turkey breast Food Protection Trends 31 3 148-155

Yoon, Yohan, Mukherjee, Avik, Geornaras, Ifigenia, Belk, Keith E., Scanga, John A, Smith, Gary C, Sofos, John N, (2011) Inactivation of Escherichia coli O157: H7 during cooking of non-intact beef treated with tenderization/marination and flavoring ingredients Food Control 22 12 1859–1864

Williams, Shanna K, Roof, Sherry, Boyle, Elizabeth A, Burson, Dennis, Thippareddi, Harshavardhan, Geornaras, Ifigenia, Sofos, John N, Wiedmann, Martin, Nightingale, Kendra, (2011) Molecular ecology of Listeria monocytogenes and other Listeria species in small and very small ready-to-eat meat processing plants Journal of food protection 74 1 63–77

Dourou, D, Beauchamp, C S, Yoon, Y, Geornaras, Ifigenia, Belk, Keith E., Smith, Gary C, Nychas, G J, Sofos, John N, (2011) Attachment and biofilm formation by Escherichia coli O157:H7 at different temperatures, on various food-contact surfaces encountered in beef processing. International journal of food microbiology 149 3 262-8

Adler, J M, Geornaras, Ifigenia, Byelashov, O A, Belk, Keith E., Smith, Gary C, Sofos, John N, (2011) Survival of Escherichia coli O157:H7 in meat product brines containing antimicrobials. Journal of food science 76 7 M478-85

Yoon, Y, Geornaras, Ifigenia, Scanga, J A, Belk, Keith E., Smith, Gary C, Kendall, Patricia A, Sofos, John N, (2011) Probabilistic models for the prediction of target growth interfaces of Listeria monocytogenes on ham and turkey breast products. Journal of food science 76 6 M450-5

Shen, C, Geornaras, Ifigenia, Belk, Keith E., Smith, Gary C, Sofos, John N, (2011) Thermal inactivation of acid, cold, heat, starvation, and desiccation stress-adapted Escherichia coli O157:H7 in moisture-enhanced nonintact beef. Journal of food protection 74 4 531-8

Shen, C, Geornaras, Ifigenia, Belk, Keith E., Smith, Gary C, Sofos, John N, (2011) Inactivation of Escherichia coli O157:H7 in moisture-enhanced nonintact beef by pan-broiling or roasting with various cooking appliances set at different temperatures. Journal of food science 76 1 M64-71

Cosansu, Serap, Geornaras, Ifigenia, Ayhan, Kamuran, Sofos, John N, (2010) Control of Listeria monocytogenes by bacteriocin-producing Pediococcus acidilactici 13 and its antimicrobial substance in a dry fermented sausage sucuk and in turkey breast Journal of Food and Nutrition Research 49 4 206-214

Geornaras, Ifigenia, Sofos, John N, others, , (2010) "Interventions for hazard control during food processing." ASM Press 396–410

Sofos, John N, Geornaras, Ifigenia, (2010) Overview of current meat hygiene and safety risks and summary of recent studies on biofilms, and control of Escherichia coli O157: H7 in nonintact, and Listeria monocytogenes in ready-to-eat, meat products Meat Science 86 1 2–14

Pradhan, Abani K, Ivanek, Renata, Gröhn, Yrjö T, Bukowski, Robert, Geornaras, Ifigenia, Sofos, John N, Wiedmann, Martin, (2010) Quantitative risk assessment of listeriosis-associated deaths due to Listeria monocytogenes contamination of deli meats originating from manufacture and retail Journal of food protection 73 4 620–630

Yang, Hua, Byelashov, O A, Geornaras, Ifigenia, Goodridge, Lawrence, Nightingale, K K, Belk, Keith E., Smith, Gary C, Sofos, John N, (2010) Characterization and transferability of class 1 integrons in commensal bacteria isolated from farm and nonfarm environments. Foodborne pathogens and disease 7 12 1441-51

Yang, Hua, Byelashov, O A, Geornaras, Ifigenia, Goodridge, Lawrence, Nightingale, K K, Belk, Keith E., Smith, Gary C, Sofos, John N, (2010) Presence of antibiotic-resistant commensal bacteria in samples from agricultural, city, and national park environments evaluated by standard culture and real-time PCR methods. Canadian journal of microbiology 56 9 761-70

Byelashov, O A, Daskalov, H, Geornaras, Ifigenia, Kendall, Patricia A, Belk, Keith E., Scanga, J A, Smith, Gary C, Sofos, John N, (2010) Reduction of Listeria monocytogenes on frankfurters treated with lactic acid solutions of various temperatures. Food microbiology 27 6 783-90

Byelashov, O A, Adler, J M, Geornaras, Ifigenia, Ko, K Y, Belk, Keith E., Smith, Gary C, Sofos, John N, (2010) Evaluation of brining ingredients and antimicrobials for effects on thermal destruction of Escherichia coli O157:H7 in a meat model system. Journal of food science 75 4 M209-17

Shen, C, Adler, J M, Geornaras, Ifigenia, Belk, Keith E., Smith, Gary C, Sofos, John N, (2010) Inactivation of Escherichia coli O157:H7 in nonintact beefsteaks of different thicknesses cooked by pan broiling, double pan broiling, or roasting by using five types of cooking appliances. Journal of food protection 73 3 461-9

Simpson Beauchamp, C, Byelashov, O A, Geornaras, Ifigenia, Kendall, Patricia A, Scanga, J A, Belk, Keith E., Smith, Gary C, Sofos, John N, (2010) Fate of Listeria monocytogenes during freezing, thawing and home storage of frankfurters. Food microbiology 27 1 144-9

Shen, Cangliang, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2009) Antilisterial activities of salad dressings, without or with prior microwave oven heating, on frankfurters during simulated home storage International journal of food microbiology 132 1 9–13

Shen, Cangliang, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2009) Control of Listeria monocytogenes on frankfurters by dipping in hops beta acids solutions Journal of food protection 72 4 702–706

Barmpalia-Davis, Ioanna M, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2009) Effect of fat content on survival of Listeria monocytogenes during simulated digestion of inoculated beef frankfurters stored at 7°C Food microbiology 26 5 483–490

Skandamis, Panagiotis N, Stopforth, Jarret D, Ashton, Laura, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2009) Escherichia coli O157: H7 survival, biofilm formation and acid tolerance under simulated slaughter plant moist and dry conditions Food microbiology 26 1 112–119

Byelashov, Oleksandr A, Carlson, Brandon A, Geornaras, Ifigenia, Kendall, Patricia A, Scanga, John A, Sofos, John N, (2009) Fate of post-processing inoculated Listeria monocytogenes on vacuum-packaged pepperoni stored at 4, 12 or 25°C Food microbiology 26 1 77–81

Yoon, Yohan, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2009) Modeling the effect of marination and temperature on Salmonella inactivation during drying of beef jerky Journal of food science 74 4 M165–M171

Pradhan, Abani K, Ivanek, Renata, Gröhn, Yrjö T, Geornaras, Ifigenia, Sofos, John N, Wiedmann, Martin, (2009) Quantitative risk assessment for Listeria monocytogenes in selected categories of deli meats: impact of lactate and diacetate on listeriosis cases and deaths Journal of food protection 72 5 978–989

Rodríguez-Marval, M, Geornaras, Ifigenia, Kendall, Patricia A, Scanga, J A, Belk, Keith E., Sofos, John N, (2009) Microwave oven heating for inactivation of Listeria monocytogenes on frankfurters before consumption. Journal of food science 74 8 M453-60

Mukherjee, A, Yoon, Y, Geornaras, Ifigenia, Belk, Keith E., Scanga, J A, Smith, Gary C, Sofos, John N, (2009) Effect of meat binding formulations on thermal inactivation of Escherichia coli O157:H7 internalized in beef. Journal of food science 74 2 M94-9

Barmpalia-Davis, Ioanna M, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2008) Differences in survival among 13 Listeria monocytogenes strains in a dynamic model of the stomach and small intestine Applied and environmental microbiology 74 17 5563–5567

Simpson, Catherine A, Geornaras, Ifigenia, Yoon, Yohan, Scanga, John A, Kendall, Patricia A, Sofos, John N, (2008) Effect of inoculum preparation procedure and storage time and temperature on the fate of Listeria monocytogenes on inoculated salami Journal of food protection 71 3 494–501

Byelashov, Oleksandr A, Simpson, Catherine A, Geornaras, Ifigenia, Kendall, Patricia A, Scanga, John A, Sofos, John N, (2008) Evaluation of changes in Listeria monocytogenes populations on frankfurters at different stages from manufacturing to consumption Journal of food science 73 9 M430–M437

Barmpalia-Davis, Ioanna M, Geornaras, Ifigenia, Kendall, Patricia A, Sofos, John N, (2008) Survival of Listeria monocytogenes in a simulated dynamic gastrointestinal model during storage of inoculated bologna and salami slices in vacuum packages Journal of food protection 71 10 2014–2023

Carlson, B A, Geornaras, Ifigenia, Yoon, Y, Scanga, J A, Sofos, John N, Smith, Gary C, Belk, Keith E., (2008) Studies to evaluate chemicals and conditions with low-pressure applications for reducing microbial counts on cattle hides. Journal of food protection 71 7 1343-8

Stopforth, Jarret D, Skandamis, Panagiotis N, Geornaras, Ifigenia, Sofos, John N, (2007) Acid tolerance of acid-adapted and nonacid-adapted Escherichia coli O157: H7 strains in beef decontamination runoff fluids or on beef tissue Food microbiology 24 5 530–538

Lianou, Alexandra, Geornaras, Ifigenia, Kendall, Patricia A, Scanga, John A, Sofos, John N, (2007) Behavior of Listeria monocytogenes at 7°C in commercial turkey breast, with or without antimicrobials, after simulated contamination for manufacturing, retail and consumer settings Food microbiology 24 5 433–443

Geornaras, Ifigenia, Yoon, Y, Belk, Keith E., Smith, Gary C, Sofos, John N, (2007) Antimicrobial activity of epsilon-polylysine against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in various food extracts. Journal of food science 72 8 M330-4

Lianou, A, Geornaras, Ifigenia, Kendall, Patricia A, Belk, Keith E., Scanga, J A, Smith, Gary C, Sofos, John N, (2007) Fate of Listeria monocytogenes in commercial ham, formulated with or without antimicrobials, under conditions simulating contamination in the processing or retail environment and during home storage. Journal of food protection 70 2 378-85

Formato, G, Geornaras, Ifigenia, Barmpalia, I M, Skandamis, P N, Belk, Keith E., Scanga, J A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2007) Effect of acid adaptation on growth during storage at 10 degrees C and resistance to simulated gastric fluid of Listeria monocytogenes inoculated onto bologna formulated with or without antimicrobials. Journal of food protection 70 1 65-9

Koutsoumanis, Konstantinos P, Geornaras, Ifigenia, Sofos, John N, (2006) "Microbiology of land muscle foods" CRC Press Taylor & Francis Group 1 52.1-52.43

Geornaras, Ifigenia, Skandamis, P N, Belk, Keith E., Scanga, J A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2006) Post-processing application of chemical solutions for control of Listeria monocytogenes, cultured under different conditions, on commercial smoked sausage formulated with and without potassium lactate-sodium diacetate. Food microbiology 23 8 762-71

Ashton, Laura, Geornaras, Ifigenia, Stopforth, J D, Skandamis, P N, Belk, Keith E., Scanga, J A, Smith, Gary C, Sofos, John N, (2006) Fate of inoculated Escherichia coli O157:H7, cultured under different conditions, on fresh and decontaminated beef transitioned from vacuum to aerobic packaging. Journal of food protection 69 6 1273-9

Stopforth, J D, Skandamis, P N, Ashton, Laura, Geornaras, Ifigenia, Kendall, Patricia A, Belk, Keith E., Scanga, J A, Smith, Gary C, Sofos, John N, (2006) Impact of inoculum preparation and storage conditions on the response of Escherichia coli O157:H7 populations to undercooking and simulated exposure to gastric fluid. Applied and environmental microbiology 72 1 672-9

Geornaras, Ifigenia, Skandamis, P N, Belk, Keith E., Scanga, J A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2006) Post process control of Listeria monocytogenes on commercial frankfurters formulated with and without antimicrobials and stored at 10 degrees C. Journal of food protection 69 1 53-61

Geornaras, Ifigenia, Sofos, John N, (2005) Activity of ε-polylysine against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes Journal of Food Science 70 9 M404–M408

Geornaras, Ifigenia, Sofos, John N, (2005) "Combining physical and chemical decontamination interventions for meat" Woodhead Publishing Ltd. 433–460

Barmpalia, Ioanna M, Koutsoumanis, Kostantinos P, Geornaras, Ifigenia, Belk, Keith E., Scanga, John A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2005) Effect of antimicrobials as ingredients of pork bologna for Listeria monocytogenes control during storage at 4 or 10°C Food Microbiology 22 2 205–211

Geornaras, Ifigenia, Belk, Keith E., Scanga, J A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2005) Postprocessing antimicrobial treatments to control Listeria monocytogenes in commercial vacuum-packaged bologna and ham stored at 10 degrees C. Journal of food protection 68 5 991-8

Geornaras, Ifigenia, Sofos, John N, (2004) "Animal Source Food: Quality and Safety—Meat and Poultry" Marcel Dekker Inc. 33-35

Geornaras, Ifigenia, Sole Codina, Laura, (2004) "Animal Source Food: Quality and Safety—Milk and Eggs" Marcel Dekker Inc. 36-38

Koutsoumanis, K P, Ashton, Laura, Geornaras, Ifigenia, Belk, Keith E., Scanga, J A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2004) Effect of single or sequential hot water and lactic acid decontamination treatments on the survival and growth of listeria monocytogenes and spoilage microflora during aerobic storage of fresh beef at 4, 10, and 25 degrees C. Journal of food protection 67 12 2703-11

Barmpalia, I M, Geornaras, Ifigenia, Belk, Keith E., Scanga, J A, Kendall, Patricia A, Smith, Gary C, Sofos, John N, (2004) Control of Listeria monocytogenes on frankfurters with antimicrobials in the formulation and by dipping in organic acid solutions. Journal of food protection 67 11 2456-64

Geornaras, Ifigenia, von Holy, Alexander, (2001) Antimicrobial susceptibilities of isolates of Staphylococcus aureus, Listeria species and Salmonella serotypes associated with poultry processing International journal of food microbiology 70 1 29–35

Geornaras, Ifigenia, Hastings, John W, von Holy, Alexander, (2001) Genotypic analysis of Escherichia coli strains from poultry carcasses and their susceptibilities to antimicrobial agents Applied and environmental microbiology 67 4 1940–1944

Geornaras, Ifigenia, von Holy, Alexander, (2000) Bacterial counts associated with poultry processing at different sampling times Journal of basic microbiology 40 5-6 343–349

Kunene, Nokuthula F, Geornaras, Ifigenia, von Holy, Alexander, Hastings, John W, (2000) Characterization and determination of origin of lactic acid bacteria from a sorghum-based fermented weaning food by analysis of soluble proteins and amplified fragment length polymorphism fingerprinting Applied and environmental microbiology 66 3 1084–1092

Geornaras, Ifigenia, Kunene, Nokuthula F, von Holy, Alexander, Hastings, John W, (1999) Amplified fragment length polymorphism fingerprinting of Pseudomonas strains from a poultry processing plant Applied and environmental microbiology 65 9 3828–3833

Geornaras, Ifigenia, de Jesus, Amelia E, von Holy, Alexander, (1998) Bacterial populations associated with the dirty area of a South African poultry abattoir Journal of food protection 61 6 700–703

Pattison, Tracey-Lee, Geornaras, Ifigenia, von Holy, Alexander, (1998) Microbial populations associated with commercially produced South African sorghum beer as determined by conventional and Petrifilm™ plating International journal of food microbiology 43 1 115–122

Viljoen, BC, Geornaras, Ifigenia, Lamprecht, A, von Holy, A, (1998) Yeast populations associated with processed poultry Food microbiology 15 1 113–117

Geornaras, Ifigenia, de Jesus, Amelia E, van Zyl, Elsabe, von Holy, Alexander, (1997) Bacterial populations of different sample types from carcasses in the dirty area of a South African poultry abattoir Journal of food protection 60 5 551–554

Geornaras, Ifigenia, de Jesus, Amelia E, van Zyl, Elsabé, von Holy, A, (1996) Bacterial populations associated with poultry processing in a South African abattoir Food microbiology 13 6 457–465

Lindsay, Denise, Geornaras, Ifigenia, von Holy, Alexander, (1996) Biofilms associated with poultry processing equipment Microbios 86 347 105–116

Dykes, Gary A, Geornaras, Ifigenia, von Holy, Alexander, (1995) Advantages of sucrose-dependent extracellular polysaccharide production to lactic acid bacteria in sucrose-rich environments Letters in applied microbiology 21 5 327–329

Geornaras, Ifigenia, Dykes, GA, Holy, A von, , (1995) Biogenic amine formation by poultry-associated spoilage and pathogenic bacteria Letters in applied microbiology 21 3 164–166

Geornaras, Ifigenia, de Jesus, Amelia, van Zyl, Elsabé, von Holy, Alexander, (1995) Microbiological survey of a South African poultry processing plant Journal of basic microbiology 35 2 73–82

Geornaras, Ifigenia, Dykes, Gary A, von Holy, Alexander, (1994) Microbial populations associated with refrigerated poultry South African Journal of Science 90 11 579–582

Dykes, Gary A, Geornaras, Ifigenia, Papathanasopoulos, Maria A, von Holy, Alexander, (1994) Plasmid profiles of Listeria species associated with poultry processing Food microbiology 11 6 519–523