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Fate of Listeria monocytogenes in shredded cabbage stored at 5 and 25°C under a modified atmosphere
Shredded cabbage was inoculated with Listeria monocytogenes Scott A cells and stored in normal air or a modified (70% carbon dioxide and 30% nitrogen) atmosphere at 5 and 25°C. Under the normal atmosphere at 25°C, colony counts increased by 2 logs within 2 d of storage but then decreased to undetect...
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Published in: | Journal of food protection 1991-04, Vol.54 (4), p.302-304 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that cite this one |
Online Access: | Get full text |
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Summary: | Shredded cabbage was inoculated with Listeria monocytogenes Scott A cells and stored in normal air or a modified (70% carbon dioxide and 30% nitrogen) atmosphere at 5 and 25°C. Under the normal atmosphere at 25°C, colony counts increased by 2 logs within 2 d of storage but then decreased to undetectable levels within 6 d of storage. In the modified atmosphere at 25°C, numbers also decreased to undetectable levels within 6 d, but with a less marked initial increase and a decline that was more rapid than in the unmodified atmosphere. In the cold (5°C), the counts increased gradually, but only by about 1 log, in both atmospheres. In the normal atmosphere at 5°C, however, colony counts decreased sharply after 13 d of storage. Reductions in colony counts coincided with decreases in cabbage pH and development of spoilage. The increased level of carbon dioxide was ineffective in controlling L. monocytogenes at 5°C. At 25°C cabbage spoilage was rapid and colony counts declined under both atmospheres of storage. |
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ISSN: | 0362-028X 1944-9097 |
DOI: | 10.4315/0362-028X-54.4.302 |