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United States Department of Agriculture

Agricultural Research Service

Related Topics

Kathleen T Rajkowski
Food Safety and Intervention Technologies Research
Microbiologist

Phone: (215) 233-6440
Fax: (215) 233-6406
Room 0123

600 E MERMAID LN
ERRC
WYNDMOOR , PA 190388598


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Inactivation of shiga toxin-producing Escherichia coli in lean ground beef by gamma irradiation -
Sommers, C.H., Rajkowski, K.T., Scullen, O.J., Cassidy, J.M., Fratamico, P.M., Sheen, S. 2015. Inactivation of shiga toxin-producing Escherichia coli in lean ground beef by gamma irradiation. Food Microbiology. DOI: 10.1016/j.fm.2015.02/013.
Evaluating natural antimicrobials for food application, in natural antimicrobials for food safety and quality -
Ukuku, D.O., Mukhopadhyay, S., Juneja, V.K., Rajkowski, K.T. 2014. Evaluating natural antimicrobials for food application, in natural antimicrobials for food safety and quality. Book Chapter. Oxford, UK: Woodhead Publishing. p. 185-202.
Survival of Campylobacter species after cryogenic freezing in ground turkey patties treated with polyphosphates -
Alternative food safety intervention technologies: flash pasteurization of finfish -
Sommers, C.H., Rajkowski, K.T., Geveke, D.J., Bigley Jr, A.B., Scullen, B.J. 2013. Alternative food safety intervention technologies: flash pasteurization of finfish. Meeting Proceedings. 1:1.
Inactivation of natural microflora and Listeria innocua on raw whole shrimp by ozonated water, antimicrobial coatings, and cryogenic freezing Reprint Icon -
Guo, M., Yang, R., Antenucci, R., Mills, B., Cassidy, J.M., Scullen, O.J., Sites, J.E., Rajkowski, K.T., Sommers, C.H., Jin, Z.T. 2013. Inactivation of natural microflora and Listeria innocua on raw whole shrimp by ozonated water, antimicrobial coatings, and cryogenic freezing. Food Control. 34:24-30.
Microbial quality of catfish nuggets -
Prevalence and enumeration of microorganisms on catfish nuggets -
Rajkowski, K.T., Sommers, C.H. 2012. Prevalence and enumeration of microorganisms on catfish nuggets [abstract]. International Association of Food Protection, July 22-25, 2012, Providence, Rhode Island. 1:1.
Incidence and inactivation of Listeria spp. on frozen shrimp -
Rajkowski, K.T., Sommers, C.H., Antenucci, R., Mills, B., Scullen, O.J., Cassidy, J.M., Sites, J.E. 2012. Incidence and inactivation of Listeria spp. on frozen shrimp [abstract]. IAFP Meeting. July 22-25, 2012, Providence, RI. 1:1.
Inactivation of foodborne pathogens on crawfish tail meat using cryogenic freezing and gamma radiation -
Rajkowski, K.T., Sommers, C.H., Antenucci, R., Scullen, O.J., Cassidy, J.M., Bender, E. 2012. Inactivation of foodborne pathogens on crawfish tail meat using cryogenic freezing and gamma radiation [abstract]. IAFP Meeting. July 22-25, 2012, Providence, Rhode Island. 1:1.
Update: intervention strategies for producing safe sprouts -
Rajkowski, K.T. 2012. Update: intervention strategies for producing safe sprouts. Meeting Abstract.Capital Area Food Protection Assn. Meeting., Washington, DC., May 17, 2012., Volume 1, Page 1.
Irradiation of seeds and sprouts -
Prevalence and enumeration of microorganisms on catfish nuggets -
Rajkowski, K.T., Hughes, S.G. 2012. Prevalence and enumeration of microorganisms on catfish nuggets. Meeting Abstract. Catfish Farmers of America Meeting. Savannah, Georgia. February 17-18, 2012.1:1.
Thermal inactivation of Escherichia coli O157:H7 and Salmonella on catfish and tilapia -
Rajkowski, K.T. 2012. Thermal inactivation of Escherichia coli O157:H7 and Salmonella on catfish and tilapia. Food Microbiology. 30(2)427-431.
Effect of anolyte on background microflora, Salmonella and Listeria monocytogenes on catfish fillets -
Rajkowski, K.T., Sommers, C.H. 2012. Effect of anolyte on background microflora, Salmonella and Listeria monocytogenes on catfish fillets. Journal of Food Protection. 75(4):765-770. DOI: 10.4315/0362-028X.JFP-11-426.
The effect of cryogenic freezing and gamma irradiation on the survival of Salmonella on frozen shrimp -
Sommers, C.H., Rajkowski, K.T., Sheen, S., Samer, C., Bender, E. 2011. The effect of cryogenic freezing and gamma irradiation on the survival of Salmonella on frozen shrimp. Journal of Food Processing and Technology. DOI: 10.4172/2157-7110 S8-001.
Effect of trisodium phosphate or water dip on the survival of Salmonella and Listeria monocytogenes inoculated catfish before and after freezing -
Rajkowski, K.T., Sommers, C.H. 2012. Effect of trisodium phosphate or water dip on the survival of Salmonella and Listeria monocytogenes inoculated catfish before and after freezing. Journal of Aquatic Food Product Technology. 21(1):39-47.
Effect of cryogenic freezing on salmonella and listeria recovery from inoculated shrimp -
Rajkowski, K.T., Bender, E. 2011. Effect of cryogenic freezing on salmonella and listeria recovery from inoculated shrimp. International Association for Food Protection.,Milwaukee, Wisconsin., 7-31 to 8-3-2011., Poster #: P3-76.
Radiation inactivation of foodborne pathogens on frozen seafood products -
Sommers, C.H., Rajkowski, K.T. 2011. Radiation inactivation of foodborne pathogens on frozen seafood products. Journal of Food Protection. 74(4):641-644.
Heat Inactivation of Human Pathogens on Catfish -
Rajkowski, K.T. 2010. Heat Inactivation of Human Pathogens on Catfish. Federal Catfish Research Conference., Washington, D.C., August 10-11, 2010., Oral Presentation, P.9.
Microbial Background on Retail Catfish -
Hughes, S.G., Rajkowski, K.T. 2010. Microbial Background on Retail Catfish. Federal Catfish Research Conference, August 10-11,2010.,Washington, DC. Volume 1, P.5.
Fat content and D-Value, A tale of two finfish -
Rajkowski, K.T. 2010. Fat content and D-Value, A tale of two finfish. International Association for Food Protection., August 1-4, 2010., Anaheim, CA., Poster#, P.1-62.
Inactivation of Listeria monocytogenes on catfish -
Sommers, C., Rajkowski, K., Mackay, W., 2010. Inactivation of Listeria monocytogenes on catfish [abstract].Federal Catfish Research Conference. Washington, DC. p.1.
Effect of individual quick freezing (IQF) on Salmonella recovery and texture of shrimp -
Rajkowski, K.T. 2010. Effect of individual quick freezing (IQF) on Salmonella recovery and texture of shrimp. 2nd International Congress on Seafood Technology (ICST 2010)May 10 – 13, 2010 Anchorage, AK.,Volume #36, P.1.
Antilisterial efficacy and lack of genotoxic potential of Listeria monocytogenes specific bacteriophages -
Mackay, W., Sommers, C., Rajkowski, K.,Barton, D., 2010 Antilisterial efficacy and lack of genotoxic potential of Listeria monocytogenes specific bacteriophages [abstract].Annual Meeting of the Society of Toxicology. Salt Lake City, UT. p.1.
Thermal inactivation of four human pathogens on catfish -
Rajkowski, K.T. 2009. Thermal inactivation of four human pathogens on catfish. 33rd Annual Seafood Science and Technology Conference., 10/26 to 10/28, 2009., New Orleans, LA., Volume 1, P.1.
Use of 1 % peroxyacetic acid sanitizer in an air-mixing wash basin to remove bacterial pathogen from seeds -
Rajkowski, K.T., Ashurst, K. 2009. Use of 1 % peroxyacetic acid sanitizer in an air-mixing wash basin to remove bacterial pathogen from seeds. Foodborne Pathogens and Disease. 6(9):1041-1046.
Antilisterial activity and lack of genotoxic potential of L. monocytogenes specific bacteriophages -
Sommers, C., Rajkowski, K.,Mackay, W. 2009. Antilisterial activity and lack of genotoxic potential of L. monocytogenes specific baceteriophages. [abstract] International Association of Food Protection. Grapevine, TX. p.1.
Radiation D10-Values on Thawed and Frozen Catfish and Tilapia for Finfish Isolates of Listeria Monocytogenes -
Rajkowski, K.T. 2008. Radiation D10-Values on Thawed and Frozen Catfish and Tilapia for Finfish Isolates of Listeria Monocytogenes. Journal of Food Protection. 71(11):2278-2282.
Percent Moisture and Seed Coat Characteristics of Alfalfa Seeds After Artificial Inoculation -
Rajkowski, K.T. 2009. Percent Moisture and Seed Coat Characteristics of Alfalfa Seeds After Artificial Inoculation. Journal of Food Safety. 224-235.
Letter to the Editor. Radiation Sensitivity of Escherichia Coli JM109 and DH5 Alpha -
Sommers, C.H., Rajkowski, K.T. 2008. Letter to the Editor. Radiation Sensitivity of Escherichia Coli JM109 and DH5 Alpha. Journal of Food Science. 73(1):vii.
Inactivation of Escherichia Coli JM109, DH5 ALPHA and O157:H7 Suspended in Butterfields Phosphate Buffer by Gamma Irradiation -
Sommers, C.H., Rajkowski, K.T. 2008. Inactivation of Escherichia Coli JM109, DH5 ALPHA and O157:H7 Suspended in Butterfields Phosphate Buffer by Gamma Irradiation. Journal of Food Science. 73(2):M87-M90.
MICROBIAL QUALITY OF FRESH-CUT ICEBERG LETTUCE WASHED IN WARM OR COLD WATER AND IRRADIATED IN A MODIFIED ATMOSPHERE PACKAGE -
Rajkowski, K.T., Fan, X. 2008. Microbial quality of fresh-cut iceberg lettuce washed in warm or cold water and irradiated in a modified atmosphere package. Journal of Food Safety. 28:248-260.
The survival of Shigella sonnei in frozen media and after ultraviolet treatment of ice and inoculated fish samples -
Rajkowski, K.T. 2007. The survival of Shigella sonnei in frozen media and after ultraviolet treatment of ice and inoculated fish samples. Ice World Journal. 9:14-23.
INHIBITION OF SHIGELLA SONNEI BY ULTRAVIOLET ENERGY ON AGAR, LIQUID MEDIA AND FRESH PRODUCE -
Rajkowski, K.T. 2007. INHIBITION OF SHIGELLA SONNEI BY ULTRAVIOLET ENERGY ON AGAR, LIQUID MEDIA AND FRESH PRODUCE. Journal of Food Safety. 233-240.
MOISTURE, SEED COAT CHARACTERISTICS, AND DISINFECTION OF ARTIFICIALLY INOCULATED ALFALFA SEEDS -
Rajkowski, K.T. 2006. Moisture, seed coat characteristics, and disinfection of artificially inoculated alfalfa seeds. IAFP. Calgary, Alberta, Canada. August 15, 2006. Pathogens and Produce Session. Poster No. P-05.
EFFECT OF GAMMA OR BETA RADIATION ON SALMONELLA DT 104 STRAINS IN GROUND PORK -
Rajkowski, K.T., Niebuhr, S.E., Dickson, J. 2006. EFFECT OF GAMMA OR BETA RADIATION ON SALMONELLA DT 104 STRAINS IN GROUND PORK. Journal of Food Protection. 69(6):1430-1433.
STUDIES OF POST-IRRADIATION SURVIVAL OF LISTERIA MONOCYTOGENES AND L. INNOCUA ON ENDIVE, REGROWTH UNDER MODIFIED ATMOSPHERE PACKAGING AND PRODUCT SENSORY QUALITIES -
Niemira, B.A., Fan, X., Sokorai, K.J., Sommers, C.H., Rajkowski, K.T. 2006. STUDIES OF POST-IRRADIATION SURVIVAL OF LISTERIA MONOCYTOGENES AND L. INNOCUA ON ENDIVE, REGROWTH UNDER MODIFIED ATMOSPHERE PACKAGING AND PRODUCT SENSORY QUALITIES. Meeting Abstract. 301-316.
RADIATION SENSITIVITY AND QUALITY OF FRESH-CUT VEGETABLES EXPOSED TO GAMMA RADIATION -
Fan, X., Niemira, B.A., Rajkowski, K.T., Sokorai, K.J. 2006. Radiation sensitivity and quality of fresh-cut vegetables exposed to gamma radiation. IAEA, July 22-30, 2005, Islamabad, Pakistan. p. 286-293.
IRRADIATION DESTRUCT VALUES OF SHIGELLA SONNIE, SALMONELLA OR ESCHERICHIA COLI O157:H7 AND POST IRRADIATION SURVIVAL AN REGROWTH OF INDIGENOUS MICROFLORA ON VEGETABLE SPROUTS AND ON WARM OR COLD WATER-WASHED CUT ICEBERG LETTU -
Rajkowski, K.T. 2005. Irradiation destruct values of shigella sonnie, salmonella or escherichia coli o157:h7 and post irradiation survival an regrowth of indigenous microflora on vegetable sprouts and on warm or cold water-washed cut iceberg lettu. IAEA Research Co-Ordination Meeting. Islambad, Pakistan. July 25-29, 2005. U.S.A. Report.
IRRADIATION DESTRUCT VALUES OF SHIGELLA SONNIE, SALMONELLA OR ESCHERICHIA COLI O157:H7 AND POST IRRADIATION SURVIVAL AND REGROWTH OF INDIGENOUS MICROFLORA ON VEGETABLE SPROUTS AND ON WARM/COLD WATER-WASHED CUT ICEBERG LETTUCE -
Rajkowski, K.T., Fan, X., Sommers, C.H., Niemira, B.A. 2006. Irradiation destruct values of shigella sonnie, salmonella or escherichia coli o157:h7 and post irradiation survival and regrowth of indigenous microflora on vegetable sprouts and on warm/cold water-washed cut iceberg lettuce. IAEA, July 25-29, 2005, Vienna, Austria. p. 317-324.
SENSORY EVALUATION OF IRRADIATED GROUND BEEF PATTIES FOR THE NATIONAL SCHOOL LUNCH PROGRAM -
Fan, X., Niemira, B.A., Rajkowski, K.T., Phillips, J.G., Sommers, C.H. 2004. Sensory evaluation of irradiated ground beef patties for the national school lunch program. Journal of Food Science. 69:S394-S387.
IRRADIATION OF READY-TO-EAT FOODS AT USDA'S EASTERN REGIONAL RESEARCH CENTER - 2003 UPDATE -
Sommers, C.H., Fan, X., Niemira, B.A., Rajkowski, K.T. 2004. Irradiation of ready-to-eat foods at usda's eastern regional research center - 2003 update. Journal of Radiation Physics and Chemistry. 71:511-514.
EFFECT OF ALFALFA SEED WASHING ON THE ORGANIC CARBON CONCENTRATION IN CHLORINATED AND OZONATED WATER -
Rajkowski, K.T., Rice, E.W. 2004. EFFECT OF ALFALFA SEED WASHING ON THE ORGANIC CARBON CONCENTRATION IN CHLORINATED AND OZONATED WATER. Journal of Food Protection. 67(4):813-817.
SIMPLIFIED QUALITATIVE METHOD FOR CANAVANINE IN SEEDS AND SPROUTS -
Rajkowski, K.T. 2004. SIMPLIFIED QUALITATIVE METHOD FOR CANAVANINE IN SEEDS AND SPROUTS. Journal of Food Protection. 67(1):212-214.
WARM WATER TREATMENT IN COMBINATION WITH MODIFIED ATMOSPHERE PACKAGING REDUCED UNDESIRABLE EFFECTS OF IRRADIATION ON THE QUALITY OF FRESH-CUT ICEBERG LETTUCE -
FAN, X., TOIVONEN, P.M., RAJKOWSKI, K.T., BAXENDALE, K.J. WARM WATER TREATMENT IN COMBINATION WITH MODIFIED ATMOSPHERE PACKAGING REDUCED UNDESIRABLE EFFECTS OF IRRADIATION ON THE QUALITY OF FRESH-CUT ICEBERG LETTUCE.. JOURNAL OF FOOD SCIENCE. 2002. V. 51. P. 1231-1236.
IRRADIATION D-VALUE FOR ESCHERICHIA COLI O157:H7 SP AND SALMONELLA SP. ON INOCULATED BROCCOLI SEEDS AND EFFECT OF IRRADIATON ON BROCCOLI SPROUT KEEPING QUALITY AND SEED VIABILITY -
VOL. 66, NO. 5, 2003, PAGES 760-766
INACTIVATION OF ESCHERICHIA COLI O157:H7 AND SALMONELLA BY GAMMA IRRADIATON OF ALFALFA SEED INTENDED FOR PRODUCTION OF FOOD SPROUTS -
QUALITY OF ALFALFA SPROUTS GROWN FROM IRRADIATED SEEDS -
Fan, X., Rajkowski, K.T., Thayer, D.W. 2003. Quality of alfalfa sprouts grown from irradiated seeds. Journal of Food Quality. 26:165-176.
RESEARCH PLANS: MICROBIOLOGICAL AND SENSORIAL RESPONSE OF LISTERIA MONOCYTOGENES INOCULATED LEAFY SALAD VEGETABLES FOLLOWING IRRADIATION AND REFRIGERATED STORAGE UNDER MODIFIED ATMOSPHERE -
Niemira, B.A., Fan, X., Rajkowski, K.T., Thayer, D.W. 2001. Research plans: microbiological and sensorial response of listeria monocytogenes inoculated leafy salad vegetables following irradiation and refrigerated storage under modified atmosphere. Report of First FAO/IAEA Research Co-Ordination Meeting, November 5-9, 2001, Rio de Janeiro, Brasil. p. 19.
CHEMICAL, PHYSICAL AND BIOLOGICAL METHODS FOR CONTROLLING HUMAN PATHOGENS ON SPROUTS -
Fett, W.F., Rajkowski, K.T., Thayer, D.W. 1999. Chemical, physical and biological methods for controlling human pathogens on sprouts. United States Japan Natural Resources Protein Panel. Proceedings, 28th Annual Meeting in Tsukuba, Ibaraki, November 7-12, p.84-89.
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Last Modified: 5/2/2016
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