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Survival of Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in and on Vacuum Packaged Lebanon Bologna Stored at 3.6 and 13.0°C

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Escherichia coli O157:H7, Salmonella Typhimurium, or Listeria monocytogenes was spread onto the surface of Lebanon bologna luncheon slices using sterile glass rods. The inoculated slices were stacked and vacuum packaged. The packages were stored at 3.6 or 13°C. The foodborne pathogens, E. coli O157:H7, Salmonella Typhimurium, or L. monocytogenes were reduced in Lebanon bologna during storage at 3.6 or 13°C. The higher storage temperature (13.0°C) resulted in significantly faster destruction of E. coli O157:H7 and L. monocytogenes, compared to storage at refrigeration temperature (3.6°C) (P < 0.005). E. coli O157:H7 was the most resistant to destruction among the three foodborne pathogens. A linear destruction of E. coli O157:H7 occurred only after an initial lag period. Storage temperature did not have a significant effect on the rate of destruction of Salmonella Typhimurium. Foodborne pathogens inoculated prior to fermentation did not show any enhanced survival compared to control cells (inoculated after fermentation) during storage of the Lebanon bologna at 3.6°C.


Document Type: Research Article

Affiliations: Department of Food Science, The Pennsylvania State University, University Park, Pennsylvania 16802, USA

Publication date: July 1, 2001

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    First published in 1937, the Journal of Food Protection®, is a refereed monthly publication. Each issue contains scientific research and authoritative review articles reporting on a variety of topics in food science pertaining to food safety and quality. The Journal is internationally recognized as the leading publication in the field of food microbiology with a readership exceeding 11,000 scientists from 70 countries. The Journal of Food Protection® is indexed in Index Medicus, Current Contents, BIOSIS, PubMed, Medline, and many others.

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