A red alert will mean a 25% or more risk of bacterial food poisoning, while a yellow alert will warn of a 15%-24% possibility.
预警系统分2个级别，红色信号属I级，表示细菌性食物中毒概率大于25%，黄色信号属II级，表示中毒概率为15% - 25%。
Methods Retrospective epidemiological method was used to analyze the prevalence of bacterial food poisoning from 1998 to 2004 in Zhongshan City.
方法用回顾性流行病学方法分析中山市1998 ~ 2004年细菌性食物中毒流行情况。
Staphylococcal food poisoning is the most common bacterial food poisoning .
葡萄球菌性食物中毒是最常见的一种细菌性食物中毒。
Methods: City of Baiyin between 2000-2009, bacterial food poisoning occurred in laboratory-confirmed test samples and results were analyzed retrospectively.
方法：对白银市2000年-2009年间细菌性食物中毒实验室确诊检测样品及结果进行分析。
Methods: City of Baiyin between 2000-2009, bacterial food poisoning occurred in laboratory-confirmed test samples and results were analyzed retrospectively.
方法：对白银市2000年-2009年间细菌性食物中毒实验室确诊检测样品及结果进行分析。
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