Journal
FOOD CONTROL
Volume 34, Issue 1, Pages 61-68Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2013.03.047
Keywords
Antimicrobial films; Chitosan; Shelf-life; Refrigerated fish
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Funding
- Spanish MEC [MAT2009-14533-C02-01, EUI2008-00182]
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The effect of chitosan films for shelf-life extension of fresh fillets of hake (Merluccius merluccius) and sole (Solea solea) was evaluated over a 15-day storage at 4 +/- 1 degrees C. Fish fillets wrapped in a chitosan matrix were individually packaged in air (AP) and under vacuum (VP). Microbiological analyses (total aerobic mesophilic bacteria, Pseudomonas, H2S-producing bacteria, lactic acid bacteria, Enterobacteriaceae and Listeria monocytogenes were carried out during the shelf-life. The microbial species were inhibited (p < 0.05) by the presence of chitosan films, especially under VP conditions. A significant (p < 0.05) increase of the lag phase and a reduction of the final microbial population were detected mainly for total aerobic mesophilic bacteria, H2S-producing bacteria and Pseudomonas. The present work demonstrates the biocide effectiveness of chitosan as an internal layer of the packaging material, offering a promising alternative which would enhance the quality of fish during refrigerated storage. (C) 2013 Elsevier Ltd. All rights reserved.
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