doi: 10.4315/0362-028x-65.3.459.
Survival and growth of Listeria monocytogenes and Escherichia coli O157:H7 in ready-to-eat iceberg lettuce washed in warm chlorinated water
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- PMID:11899043
- DOI: 10.4315/0362-028x-65.3.459
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Survival and growth of Listeria monocytogenes and Escherichia coli O157:H7 in ready-to-eat iceberg lettuce washed in warm chlorinated water
Scal Delaquis et al. J Food Prot.2002 Mar.
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Abstract
Cut iceberg lettuce inoculated with Escherichia coli O157:H7 and Listeria monocytogenes before and after washing for 3 min in cold (4 degrees C) and warm (47 degrees C) water containing 100 mg/liter total chlorine was stored at I and 10 degrees C in oxygen-permeable film packages (6,000 to 8,000 cc/m2/24 h). Cold chlorinated water was detrimental to the survival of E. coli O157: H7 and L. monocytogenes at both storage temperatures. In contrast, washing in warm chlorinated water favored the growth of both pathogens in lettuce stored at 10 degrees C. There was no evidence of a relationship between the magnitude of spoilage microflora and the fate of either bacterium.
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