Type of Document Master's Thesis Author Goode, Jennifer Ann URN etd-10222001-111731 Title Inhibition of Listeria monocytogenes on frankfurters by modified atmosphere packaging and antimicrobials Degree Master of Science Department Food Science and Technology Advisory Committee
Advisor Name Title Pierson, Merle D. Committee Chair Marcy, Joseph E. Committee Member Sumner, Susan S. Committee Member Keywords
- Listeria monocytogenes
- sodium lactate
- sodium acetate
- sodium diacetate
- carbon dioxide
Date of Defense 2001-10-18 Availability unrestricted AbstractINHIBITION OF LISTERIA MONOCYTOGENES ON FRANKFURTERS BY MODIFIED ATMOSPHERE PACKAGING AND ANTIMICROBIALS
Jennifer A. Goode
Merle D. Pierson, Ph.D., Committee Chairman
Food Science and Technology
The objective of this study was to determine the effect of vacuum packaging and 100% CO2 with and without sodium lactate (0%, 2.4%, 4.8%), sodium acetate (0%, 0.25%, 0.50%), and sodium diacetate (0%, 0.25%, 0.50%) on the inhibition of L. monocytogenes on turkey frankfurters. After 4 weeks at 4°C, the counts of L. monocytogenes did not increase in any treatment, including the control. The use of sodium lactate (4.8%), sodium acetate (0.5%), and sodium diacetate (0.5%) provided approximately a 0.5 log10 CFU/g decrease when compared to the control; however, there was not a significant (P > 0.05) difference between the control and the samples using sodium acetate (0.25%), sodium diacetate (0.25%), or sodium lactate (2.4%). There was also no significant difference between the samples packaged in 100% CO2 or under vacuum (P > 0.05). After 4 weeks at 10°C, growth of L. monocytogenes was approximately 1-1.5 log lower on the frankfurters packaged in 100% CO2 than those packaged in a vacuum atmosphere (P £ 0.001). Sodium acetate (0.5%) and sodium lactate (2.4%) in combination with a high CO2 atmosphere prevented any increase in L. monocytogenes numbers for up to 4 weeks at 10°C. The use of sodium lactate (4.8%) and sodium diacetate (0.5%) in combination with a high CO2 atmosphere resulted in a decrease in numbers of L. monocytogenes on the frankfurters by ~0.5 log (P £ 0.001). Strict temperature control is needed to prevent the growth of L. monocytogenes. A high CO2 atmosphere in combination with antimicrobials may assist in keeping the numbers of the organism in the food low in the case of product contamination and temperature abuse.
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28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access coverpage.PDF 23.66 Kb 00:00:06 00:00:03 00:00:02 00:00:01 < 00:00:01 fig7.PDF 37.83 Kb 00:00:10 00:00:05 00:00:04 00:00:02 < 00:00:01 figures.PDF 35.19 Kb 00:00:09 00:00:05 00:00:04 00:00:02 < 00:00:01 Methods.pdf 44.46 Kb 00:00:12 00:00:06 00:00:05 00:00:02 < 00:00:01 Review.pdf 89.68 Kb 00:00:24 00:00:12 00:00:11 00:00:05 < 00:00:01 tableref.PDF 37.38 Kb 00:00:10 00:00:05 00:00:04 00:00:02 < 00:00:01
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