天津市B区一起家庭聚集性新型冠状病毒肺炎疫情调查分析

目的 分析天津市B区一起新型冠状病毒肺炎(coronavirus disease 2019, COVID-19)家庭聚集性疫情流行病学特征,为聚集性疫情的防控提供科学依据。 方法 应用现场流行病学方法调查病例及其密切接触者,采用实时荧光定量 RT-PCR 法对采集的呼吸道标本进行新型冠状病毒核酸检测。 结果 本起聚集性疫情共发现10名确诊病例和1名无症状感染者,主要以共同居住和同桌进餐等近距离接触方式传播,部分病例发病前已具备传染性,存在需多次采样检测核酸方能确诊的现象。结论 新冠肺炎家庭内传染性较强,要强化家庭成员之间防护意识,加强对无症状感染者的追踪、管理等防控措施,防止家庭聚集性疫情发生和传播。

Epidemic status of a family cluster of coronavirus disease 2019 in district B of Tianjin municipality

Objective To analyze the epidemiological characteristics of a family aggregation of coronavirus disease 2019 (COVID-19) in district B of Tianjin municipality so as to provide a scientific basis for prevention and control of aggregation epidemics. Methods Field epidemiological methods were used to investigate cases and their close contacts, and real-timefluorescent quantitative RT-PCR was used for SARS-CoV-2 nucleic acid detection of the respiratory specimens collected. Results A total of 10 confirmed patients and 1 asymptomatic patient were found in this cluster epidemic, and they were mainly transmitted by close contact such as co-living and dining at the same table. Some of the cases appeared to be contagious before the onset, and there existed a phenomenon that multiple sampling and testing of nucleic acids were needed to confirm the case. Conclusions COVID-19 is a highly contagious condition that can spread within the family; and hence, it is necessary to strengthen the awareness of protection among family members and enhance the tracking and management of asymptomatic patients and prevention and control measures so as to avoid the occurrence and spread of family cluster epidemic.