摘要
目的分析青岛地区新型冠状病毒肺炎(COVID-19)的流行病学特征。方法纳入青岛市自2020年1月21日至3月3日所有COVID-19确诊病例(n=60),收集患者基本信息和流行病学资料,分析易感人群、传播模式、基本繁殖数、疫情进展及其与防控措施的相关性。结果60例确诊患者包括27例输入性病例和33例本地感染病例。本地感染者以女性为主,占69.7%,显著高于输入性病例(37.0%)(χ^2=6.400,P=0.011)。本地共发生三代传播,发病例数逐代减少。青岛地区总病例R0值为1.49。本地一代、二代和三代的R0值分别为1.38、1.53、1.56。传播模式由家庭聚集性向密切接触转换。结论青岛地区本地传播病例女性易感,日新增病例总体呈波浪式下降趋势,目前疫情已基本得到控制,应进一步做好分区分级精准防控,加强对外来人员的隔离观察,防止出现疫情反弹。
Objective To analyze the epidemiological characteristics of coronavirus disease 2019(COVID-19)in Qingdao.Methods All the patients diagnosed as COVID-19 in Qingdao from January 21,2020 to March 3,2020 were included.The demographic and epidemiological data were collected.The susceptible population,transmission model,basic reproduction number(R0),progress of epidemic situation,and preventive measures were analyzed.Results A total of 60 cases of COVID-19 were enrolled,including 27 imported cases and 33 locally transmitted cases.The proportion of females in locally transmitted cases was 69.7%,which was significantly higher than that of imported cases(χ^2=6.400,P=0.011).Three infected generations were found in locally transmitted cases.The quantity of infected cases had a decreasing trend with generation sequentially increased.The R0 value of all cases in Qingdao was 1.49.The R0 s of first,second and third generations were 1.38,1.53 and 1.56,respectively.The model of transmission converted from family aggregation to close contacts.Conclusion Females are susceptible to COVID-19 in Qingdao.The trend of new daily cases is wavily declining and the epidemic has been basically controlled.It is necessary to do a good job in zoning,grading and precise prevention and control,strengthen the isolation and observation of foreign population to prevent the rebound of COVID-19.
作者
徐晓娜
孙昕
贾盛佼
于婷
于新娟
董全江
王莉莉
XU Xiaona;SUN Xin;JIA Shengjiao;YU Ting;YU Xinjuan;DONG Quanjiang;WANG Lili(Central Laboratory,Qingdao Municipal Hospital,Qingdao,Shandong 266000,China)
出处
《中国微生态学杂志》
CAS
CSCD
2020年第5期586-590,共5页
Chinese Journal of Microecology
基金
国家自然科学基金青年项目(81602144)。
