不同保存条件下菲律宾蛤仔的细菌学检测分析

Analysis of the bacteriological detection of Ruditapes philippinarum stored in different conditions

对比分析了菲律宾蛤仔在15℃、4℃、-18℃三种不同保存条件下,其存活率、菌落总数、大肠埃希氏菌数和弧菌总数随时间的变化及其之间的相关性。实验结果发现,4℃保存条件下菲律宾蛤仔的存活率最高,至96 h其存活率仍为100%。细菌学检测方面,随着存放时间的延长,-18℃条件下菲律宾蛤仔的菌落总数、大肠埃希氏菌数、弧菌总数基本维持恒定,均低于初始检测值;而15℃和4℃条件下菲律宾蛤仔的菌落总数和弧菌总数均呈不同程度的上升趋势,并且两者之间的相关性显著,相关系数分别为0.884、0.927,而大肠埃希氏菌数变化幅度不大。

In the paper, the survival rate of Ruditapes philippinarum, the colony count, the number of Esch- erichia coli and the number of vibrio in Ruditapes philppinarum were detected, with time changing, when stored at 15℃, 4℃ and - 18℃, and the correlations between them were analyzed. The results showed that the survival rate of Ruditapes philippinarum at 4℃ still maintain the 100% saruivel rate of the time of 96 h. The colony count, the number of Escherichia coli and the number of vibrio of Ruditapes philippinarum at - 18℃ showed no significant change, with the increase of storage time, and were lower than those at 0 h re- spectively. In contrast, the colony count and the number of vibrio of Ruditapes philippinarum at 15℃ and 4℃ showed a rising trend at different levels. Meanwhile, the correlation coefficients between them at 15℃ and 4℃ were significant, respectively 0. 884, 0. 927. However, the number of Escherichia coli showed no significant change at 15℃ and 4℃.