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目的分析集体单位发生诺如病毒感染性腹泻的流行特征,为预防、控制此类疫情提供科学依据。方法收集2017年3月1日至3月15日,某校医院接诊的所有腹泻病例信息,采用现场和回顾性流行病学调查方法,结合生物和环境样本实验室检测。结果此次疫情历时15 d,累计发病110例,罹患率1.06%。经对病例及食堂从业人员的180份生物样本检测,诺如病毒核酸检测阳性29份,其中学生病例粪检阳性8份,阳性率42.11%(8/19),食堂从业人员粪检阳性21份,阳性率13.04%(21/161)。结论食堂从业人员诺如病毒隐性感染是导致此次疫情爆发的主要原因。
Objective To analyze the epidemiological characteristics of norovirus infectious diarrhea in collective units and provide a scientific basis for prevention and control of such epidemic. Methods We collected all cases of diarrhea admitted to a school hospital from March 1, 2017 to March 15, 2017, and adopted on-site and retrospective epidemiological investigation methods in combination with biological and environmental samples laboratory tests. Results The outbreak lasted 15 days, with a cumulative incidence of 110 cases and an attack rate of 1.06%. A total of 29 samples of norovirus positive samples were detected in 180 biological samples of patients and canteens. Among them, 8 were positive in fecal samples, the positive rate was 42.11% (8/19), 21 were fecal positive in canteens , The positive rate was 13.04% (21/161). Conclusion Recessive infection of Norovirus in canteens was the main reason leading to the outbreak.