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2011年3月8日,杭州市下城区一实验小学二(2)班多名学生发生不明原因呕吐、腹泻、腹痛、头晕等症状,采用现场流行病学调查方法,搜索病例进行个案调查,采集患者粪便和饮用水进行病原菌、腹泻病毒核酸检测。结果 7份患者粪便中6份为GⅡ型诺如病毒阳性;6份饮用水样中4份为GⅡ型诺如病毒阳性,6份饮用水样菌落总数均超标,5份大肠菌群超标,13份标本均未检出致病菌。确定此次学校感染性腹泻暴发疫情是由诺如病毒污染桶装饮用水引起。
On March 8, 2011, more than two students from two primary (2) classes in Xia Experimental Primary School, Xiacheng District, Hangzhou City, developed symptoms of unknown causes of vomiting, diarrhea, abdominal pain and dizziness. Cases were investigated by field epidemiological investigation and collection Patient excrement and drinking water were tested for pathogen and diarrhea virus nucleic acid. Results Six of the seven patients were positive for Gnoviruses. Four of six drinking water samples were positive for Gnoviruses. The total number of colonies of six drinking water samples exceeded the standard, five were coliform excess, 13 No specimens were detected pathogenic bacteria. To determine the school outbreak of infectious diarrhea is caused by Norovirus contamination of bottled drinking water.