伊犁州新型冠状病毒肺炎聚集性疫情调查

Investigation on family aggregation of COVID-19 cases in Ili prefecture

目的描述性分析发病日期截止2020年2月17日涉及新疆伊犁哈萨克自治州(简称伊犁州)新型冠状病毒肺炎聚集性病例流行病学特征,为防控聚集性疫情提供参考依据。方法应用现场流行病学方法调查伊犁州新型冠状病毒肺炎聚集性病例及密切接触者,开展病例描述流行病学分析。结果伊犁州报告聚集性疫情7起,其中家庭(族)聚集性6起、其他感染1起;7起聚集性疫情阳性感染者共23例,涉及伊犁州、新疆生产建设兵团第四师和乌鲁木齐市,其中伊犁州本地确诊病例15例、占辖区确诊病例的83.3%(15/18),伊犁州本地无症状感染者3例,其他地区确诊病例5例(乌鲁木齐市2例、兵团第四师3例),平均续发率5.66%;发病主要分布在60岁以上(34.8%),以农民为主(21.7%);临床表现主要为发热(100.0%),其次为咳嗽(45.0%),存在胃肠道症状(10.0%);重型及危重型比例为15.0%。结论此次伊犁州新型冠状病毒肺炎聚集性疫情主要以家庭聚集性为主;建议加强社区防控、强化宣传、增强个人防护意识,谨防家庭聚集性疫情发生。

Objective To descriptively analyze the epidemiological characteristics of the clustering cases of COVID-19 in Ili Kazak autonomous prefecture(Ili prefecture)of Xinjiang by February 17,2020,and provide basis for prevention and control of clustering epidemic.Methods The COVID-19 clustering cases and their close contacts were investigated with field epidemiological methods,and analyzed with descriptive epidemiology in Ili prefecture.Results There were 7 clustering epidemics reported in Ili prefecture,with 6 family aggregation epidemics and 1 other infection.Out of the 23 cases of the 7 clustering epidemics involved in Ili prefecture,the fourth division of Xinjiang Production and Construction Corps,and Urumqi city,there were 15 confirmed cases,accounting for 83.3%(15/18)of the confirmed cases and 3 asymptomatic cases in Ili prefecture.Other 5 cases were confirmed in other areas(2 cases in Urumqi,3 cases in the fourth division).The average secondary attack rate was 5.66%.The patients mainly distributed in the age group over 60 years(34.8%),with farmers of the dominant(21.7%).The main clinical manifestations were fever(100.0%),cough(45.0%)and digestive tract symptom(10.0%).The severe and critical cases accounted for 15.0%.Conclusions The cases of COVID-19 in Ili prefecture show family aggregation.It is suggested to strengthen the community prevention and enhance the personal protection awareness for preventing family aggregation.