陕西省一起新型冠状病毒肺炎聚集性疫情调查分析

白尧; 孙亚辉; 刘继锋; 陈志军; 陈保忠

doi:10.19428/j.cnki.sjpm.2020.20291

陕西省一起新型冠状病毒肺炎聚集性疫情调查分析

Investigation of a cluster outbreak of coronavirus disease 2019 in Shaanxi Province

摘要

摘要:
目的调查分析陕西省W市一起参加葬礼引起的新型冠状病毒肺炎聚集性疫情传播特征，为制定防控策略提供科学依据。
方法对确诊病例及无症状感染者及其密切接触者进行流行病学调查，分析疫情的传播链，采集病例及相关人员的鼻咽拭子标本进行新型冠状病毒(SARS-CoV-2)核酸检测。
结果本次疫情累计发现5例普通型、1例重症型确诊病例和1例无症状感染者，罹患率为5.88%(6/102)。首例病例A于2020年1月25日发病，其他病例发病日期为首例病例发病后3~13 d，病例B、C、D，病例E、F分别为二至三代病例。疫情由同一时段人员参加葬礼聚会时密切接触而传播，潜伏期中位数为11.5 d。
结论2019-nCoV传播能力强，应及早发现传染源，做好个人防护，尽量减少人群聚会，控制聚集性疫情的发生。

Abstract:
ObjectiveTo investigate and analyze the transmission characteristics of a cluster outbreak of coronavirus disease 2019 (COVID-19) in a funeral in W city, Shaanxi province, in order to inform prevention and intervention strategies for COVID-19.
MethodsWe carried out epidemiological investigation on confirmed cases and their close contacts, analyzed the transmission chain, and then collected nasopharyngeal swabs of the cases and related persons for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleic acid testing.
ResultsA total of 5 mild and 1 severe confirmed cases, and 1 asymptomatic case were identified, with the attack rate of 5.88% (6/102).The first case, case A, had the onset on January 25, 2020, and other cases occurred 3 to 13 days later.case B, C, D and case E, F were determined to be second and third generation cases, respectively.The outbreak occurred through close contact in the funeral.The average incubation period was estimated to be 11.5 days.
ConclusionSARS-CoV-2 has been identified to be highly transmissible.It is necessary to recognize the source of infection as early as possible, to prepare personal protection, and to avoid mass gathering so as to control potential cluster outbreaks.

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