论文部分内容阅读
目的调查深圳市某社会福利中心胃肠炎暴发的感染来源、传播途径及危险因素。方法采用现场流行病学调查分析和实验室检测方法。结果本次胃肠炎暴发共27例病例,老人罹患率为7.95%(21/264),医护人员罹患率为5%(6/120)。患病老人肛拭子诺如病毒检出率为18.18%(2/11),5份患病护工肛拭子中3份阳性,无症状护工肛拭子诺如病毒检出率为18.37%(9/49)。无症状携带者从检出病毒至无法检出的时间,最长为8 d,平均5 d。3份样本经基因序列测定,显示100%同源,为目前全球流行的Sydney2012变异株。结论本次疫情为一起诺如病毒胃肠炎暴发,护理人员在传播可能起到桥梁作用。首次对暴发疫情中无症状病毒携带人员病毒携带时间和发病老人、发病护理人员的病毒携带时间进行监测,为今后诺如病毒胃肠炎暴发疫情控制中隔离措施的制定提供了依据。
Objective To investigate the source, route of transmission and risk factors of gastroenteritis outbreak in a social welfare center in Shenzhen City. Methods Epidemiological investigation and laboratory testing methods were used. Results A total of 27 cases of gastroenteritis outbreaks were reported. The attack rate was 7.95% (21/264) for the elderly and 5% (6/120) for the medical staff. The detection rate of norovirus in the elderly rectal swab was 18.18% (2/11), 3 positive in 5 swine anus swabs and 18.37% in asymptomatic bezoar swab 9/49). Asymptomatic carriers from detection of the virus to the time can not be detected, up to 8 d, an average of 5 d. The 3 samples were sequenced and showed 100% homology. This is the Sydney2012 variant currently prevailing in the world. Conclusion The outbreak is a Norovirus gastroenteritis outbreak, nursing staff may play a role in the spread of the bridge. It is the first time to monitor the virus carrying time of asymptomatic virus carriers in outbreaks and the carrying time of viruses for the elderly and morbidity nurses, which provides a basis for future isolation measures in the control of outbreaks of norovirus gastroenteritis.