Fate of Listeria monocytogenes on Packaged, Refrigerated, and Frozen Seafood

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Abstract
The fate of Listeria monocytogenes on packaged, refrigerated, and frozen seafood was determined. Fish and shrimp were inoculated with L. monocytogenes, packaged by one of three treatments (film overwrap or 2 vacuum packaging treatments), and stored either on ice for 21 d or at −20°C for 3 months. No increase in the L. monocytogenes population on iced products was noted regardless of the type of packaging. Populations on frozen products decreased by less than 1 log after 3 months. Vacuum packaging of chilled fish and seafood in the material evaluated may be an alternative packaging treatment.

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