北京某小学一起诺如病毒急性胃肠炎暴发疫情调查

Epidemiological investigation on an outbreak of acute gastroenteritis caused by Norovirus in Beijing

目的分析北京市某小学一起诺如病毒胃肠炎暴发疫情的流行特点,探讨急性胃肠炎暴发疫情调查处理的经验。方法采取人员访谈的形式收集暴发疫情基本情况,采用统一的调查表对患者进行流行病学调查,并采集粪便标本,用RT-PCR方法检测诺如病毒核酸。结果此次疫情流行历时4 d,共发现患儿24例,涉及5个班级,主要集中在一年级,罹患率为13.95%。男性16例,女性8例,年龄均数为6.63岁。患者以呕吐症状为主,未出现腹泻病例。8件患儿便标本中检出GⅡ组诺如病毒核酸6件,阳性率为75.00%。结论此次疫情为一起由GⅡ组诺如病毒感染引起的急性胃肠炎暴发疫情。

Objective To investigate and to analyze the epidemiological characteristics of an outbreak of norovirus gastroenteritis in a primary school in Beijing,so as to explore the investigation experience of acute gastroenteritis outbreaks.Methods Personnal interview was used to collect the basic situation, and the unified questionnaire was applied for the epidemiological investigation on the patients. Fecal samples were collected and were detected for norovirus nucleic acids by RTPCR. Results The outbreak lasted for 4 days and 24 cases were found in 5 classes with an attack rate of 13. 95 %. There were 16 male and 8 female cases. The mean age was 6. 63 years old. The primary symptom was vomiting,and no diarrhea cases were observed. Six out of the eight fecal samples were positive for norovirus nucleic acid and the positive rate was 75. 00 %.Conclusion The pathogen of the gastroenteritis outbreak was norovirus type GⅡ.