摘要
选取截至2020年2月24日中国疾病预防控制信息系统中上报的所有陕西省新型冠状病毒肺炎病例为研究对象,共245例,将其分为输入型(116例,47.3%)和本地型(129例,52.7%)病例,分析其基本特征、时间分布、传播方式、代际间隔及潜伏期传播等。本地型病例的年龄(51.74±15.67)岁,以及女性(69例,53.5%)、家务待业及离退人员(40例,31.0%)、发病时隔离患者(50例,38.8%)比例均高于输入型病例[分别为(40.66±15.41)岁、(45例,38.8%)、(21例,18.1%)、(17例,14.6%)](P值均<0.05);密切接触者感染率0.8%(31/3666)低于输入型病例2.0%(69/3435)(P<0.001);本地型病例感染的主要来源为亲属(70例,54.3%),感染的主要方式为生活和聚会/聚餐(90例,69.8%);潜伏期传播所占比例为15.5%(20例),二代病例与传染源接触至发病的间隔天数约为4 d,代际间隔天数约为6 d。综上,陕西省本地型病例感染的主要途径为与传染源共同生活和聚会/聚餐,目前存在一定比例的潜伏期传播病例,建议密切接触者的排查应从病例发病前4 d或更早时间开始。
A total of 245 cases of COVID-19 in Shaanxi Province reported in the China information system for disease control and prevention as of February 24,2020 were selected as the research objects,the cases are divided into imported cases(116 cases,47.3%)and local cases(129 cases,52.7%),their basic characteristics,time distribution,transmission mode,intergenerational interval and latent period transmission are analyzed.The age of local cases[(51.74±15.67)years old],female patients(69 cases,53.5%),housework and retired staff(40 cases,31.0%),and patients isolated at the time of onset(50 cases,38.8%)were higher than imported cases,respectively[(40.66±15.41)years old,(45 cases,38.8%),(21 cases,18.1%),(17 cases,14.6%)](P values were<0.05);The infection rate was 0.8%(31/3666)in close contacts with local cases,which was lower than imported cases 2.0%(69/3435)(P<0.001);The main source of infection in local cases was relatives(70 cases,54.3%),and the main way of infection was living together and party(90 cases,69.8%);the proportion of latent period transmission in our province was 15.5%(20 cases),and the interval between the second-generation case and the source of infection was about 4 days,and the interval between generations was about 6 days.In summary,the main way of infection of local cases in Shaanxi Province was living together and party,there were a certain proportion of latent period transmission cases at present,it's suggested that the investigation of close contacts should be started 4 days or earlier before the onset of the case.
作者
宁少奇
张义
曹磊
陈飒
王维华
年云鹏
朱妮
杨国婧
李欣欣
张少白
Ning Shaoqi;Zhang Yi;Cao Lei;Chen Sa;Wang Weihua;Nian Yunpeng;Zhu Ni;Yang Guojing;Li Xinxin;Zhang Shaobai(Shaanxi Provincial Centre for Disease Control and Prevention,Institute for Communicable Disease Control and Prevention/Public Health Emergency Center,Xi'an 710054,China;Shaanxi Provincial Centre for Disease Control and Prevention,Institute for Non-communicable Disease Control and Prevention,Xi'an 710054,China)
出处
《中华预防医学杂志》
CAS
CSCD
北大核心
2020年第5期493-497,共5页
Chinese Journal of Preventive Medicine
关键词
新型冠状病毒肺炎
传播特点
潜伏期传播
COVID-19
Communication characteristics
Latent period transmission
