Tracing the food sources of isolated strains of Listeria monocytogenes through fatty acid profiles analysis

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• 作者：Ailing Guo ; Ting Liu ; Ji Xie ; Hongjiang Wang ; Hong Yang ; Huaying Zheng ; Ting Chen ; Min Zhang ; Meihu Ma
• 关键词：Trace ; Listeria monocytogenes ; Fatty acid profiles ; Isolated strains ; Food source
• 刊名：Food Control
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：21
• 期：8
• 页码：1092-1098
• 全文大小：259 K

文摘

Listeria monocytogenes widely exists in different kinds of food. L. monocytogenes infection could induce to a highly fatality ratio up to 30–50 % . The objection of this study is to provide a new way to trace the food sources of isolated strains of L. monocytogenes when a foodborne poisoning of L. monocytogenes breaking up. In this paper, the whole-cell fatty acid profiles for the 22 strains were detected by the microorganism identification system (MIS). Results showed that the major fatty acid components of L. monocytogenes were branched acids: anteiso C_15:0, anteiso C_17:0, iso C_15:0, iso C_17:0, iso C_16:0, iso C_14:0, saturated chain C_16:0 and C_14:0 and hydroxy acid C_8:0 3OH. Based on the fatty acid profiles, 22 L. monocytogenes strains were statistically clustered into three major subgroups, which were highly relative to their food sources. Strains in the same cluster were isolated from the same food source, while strains in different clusters were isolated from different food sources.