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1·The cloned genes of Shiga toxin protective antigens provided essential material for the immunological re-search of Shiga toxin.

志贺毒素保护性抗原基因的获得为志贺毒素的免疫学研究准备了必要的材料。

2·E. coli O157: H7 and other Shiga toxin-producing E. coli (STEC) are important human pathogens that are mainly transmitted through the food chain.

肠出血性大肠埃希菌o 157： H7和其它产志贺样毒素大肠埃希菌是引起人类疾病的重要食源性致病菌，它们主要通过食物链传播。

3·BACKGROUND a large outbreak of the hemolytic-uremic syndrome caused by Shiga-toxin-producing Escherichia coli O104: H4 occurred in Germany in May 2011.

背景2011年5月在德国发生了一次由产志贺毒素大肠杆菌o 104： H4引起的溶血性尿毒症综合征的大暴发流行。