Changes in microbial flora of Pacific oysters (Crassostrea gigas) during refrigerated storage and its shelf-life extension by chitosan

文献类型： 外文期刊

第一作者： Xue, Chang-hu

作者： Xue, Chang-hu;Liu, Qi

作者机构：

关键词： Pacific oyster;Microbial flora;Chitosan;Shelf-life

期刊名称：INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY （ 影响因子：5.277； 五年影响因子：5.388 ）

ISSN： 0168-1605

年卷期： 2009 年 131 卷 2-3 期

页码：

收录情况： SCI

摘要： Changes in microbial flora of Pacific oysters (Crassostrea gigas) during storage at 5 +/- 1 degrees C were analyzed and the antimicrobial activity of chitosan was studied to identify its potential in shelf-life extension. The dominant microorganisms were found to be Pseudomonas (22%) and Vibrionaceae (20%) in raw oysters. During storage, proportion of Pseudomonas increased significantly and reached 73% at the end of storage, while Vibrionaceae preserved a level of approximate 20%. Wide-spectrum antibacterial property of chitosan against the bacteria isolated from oysters was discovered, and chitosan concentration of 5.0 g/L was eventually determined for application in oyster preservation. Based on microbiological analysis, biochemical indices determination and sensory evaluation, shelf-life of oysters stored at 5 +/- 1 degrees C was determined. Data showed that chitosan treatment extended the shelf-life of oysters from 8-9 days to 14-15 days. (C) 2009 Elsevier B.V. All rights reserved.

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