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预防医学  2020, Vol. 32 Issue (7): 678-681    DOI: 10.19485/j.cnki.issn2096-5087.2020.07.007
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青田县一起境外输入新型冠状病毒肺炎聚集性疫情分析
倪晓媚, 柯珍, 季小微, 洪久洋, 卢远建, 朱周威, 曾永, 朱海博
青田县疾病预防控制中心,浙江 青田 323900
Investigation on a cluster of overseas imported COVID-19 in Qingtian County
NI Xiaomei, KE Zhen, JI Xiaowei, HONG Jiuyang, LU Yuanjian, ZHU Zhouwei, ZENG Yong, ZHU Haibo
Qingtian Center for Disease Control and Prevention,Qingtian,Zhejiang 323900,China
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摘要 目的 对丽水市青田县一起境外输入新型冠状病毒肺炎(COVID-19)聚集性疫情开展流行病学调查,为防控境外输入COVID-19疫情提供依据。方法 按照国家卫生健康委员会发布的《新型冠状病毒肺炎防控方案(第五版)》开展现场流行病学调查,排查密切接触者,采集咽拭子痰液标本检测严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)核酸。分析该起聚集性疫情的病例特征、传染来源、传播过程和处置情况。结果 2020年3月1日—6日共报告8例COVID-19确诊病例和1例无症状感染者,年龄中位数为33岁。9例病例入院时均无发热症状,白细胞和淋巴细胞计数均未见降低,7例无明显临床症状;1例无症状感染者先后6次检测SARS-CoV-2核酸均为阴性,但SARS-CoV-2 IgM抗体弱阳性和IgG抗体强阳性。9例病例为意大利贝加莫省同一餐厅员工,分住于3个独立别墅内,平时在工作餐厅共进午餐和晚餐。贝加莫地区COVID-19疫情严重,餐厅正常营业期间工作人员未采取佩戴口罩、环境消毒等有效防护措施,8例病例自述2月中旬前后在意大利期间均出现过类似感冒症状。青田县卫生健康系统通过落实现症病例隔离治疗、密切接触者筛查隔离和加强居民健康教育等一系列措施,实行“全员、全方位、全链条”闭环管理,共追溯密切接触者372人,未发现密切接触者出现发热和呼吸道症状。结论 这是一起境外输入COVID-19聚集性疫情,病例临床症状不明显。青田县及时采取全链条闭环管控,有效遏制了疫情传播扩散,未发现二代病例。
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倪晓媚
柯珍
季小微
洪久洋
卢远建
朱周威
曾永
朱海博
关键词 新型冠状病毒肺炎境外输入聚集性疫情无症状感染者    
AbstractObjective To conduct an epidemiological investigation on a cluster of overseas imported cases of coronavirus disease 2019(COVID-19)in Qingtian County, Lishui,so as to provide reference for the prevention and control of COVID-19 imported from abroad. Methods According to the COVID-19 Prevention and Control Program (FiFth Edition) issued by National Health Commission of China,a field investigation was employed and the close contacts of the case were tracked down ;the real-time reverse transcription polymerase chain reaction (RT-PCR) assay was performed to detect the nucleic acid of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) from the sputum specimens or throat swabs of cases;the epidemiological characteristics,source of infection,route of transmission and disposal of the cluster were analyzed. Results From March 1 to March 6,2020,eight confirmed cases and one asymptomatic case of COVID-19 were reported. Their median age was 33 years old. The nine cases all had no fever,no decrease in leukocyte and lymphocyte levels,and the clinical symptoms of seven cases were not obvious. The asymptomatic case had been tested negative for SARS-CoV-2 for six times,but had been weakly positive for IgM antibody and strongly positive for IgG antibody. Nine cases were all the employees of the same restaurant in Begamo,Italy. They lived in three independent villas and usually had lunch and dinner in the restaurant where they worked. Begamo had COVID-19 epidemic,but the staff of the restaurant did not take any protective measures such as wearing masks and environmental disinfection. Eight cases reported to have cold symptoms in Italy during mid February. Through a closed-loop management of“all people,all sites,all chains ”,such as treatment of current cases,screening and isolation of close contacts and health education,totally 372 close contacts were traced back,yet no fever or respiratory symptoms have been found. Conclusions It was a cluster of COVID-19 cases imported from abroad. The clinical symptoms of the cases were not obvious. Qingtian County adopted the closed-loop management in time,and effectively controlled the spread of the epidemic. No second-generation cases have been found.
Key wordscoronavirus disease 2019    overseas imported case    cluster    asymptomatic case
收稿日期: 2020-03-21      出版日期: 2020-07-21
ZTFLH:  R181.3  
基金资助:青田县科技计划疫情防控应急项目(2005yj)
通信作者: 倪晓媚,E-mail:nxm1978@126.com   
作者简介: 倪晓媚,本科,副主任技师,主要从事微生物检测工作
引用本文:   
倪晓媚, 柯珍, 季小微, 洪久洋, 卢远建, 朱周威, 曾永, 朱海博. 青田县一起境外输入新型冠状病毒肺炎聚集性疫情分析[J]. 预防医学, 2020, 32(7): 678-681.
NI Xiaomei, KE Zhen, JI Xiaowei, HONG Jiuyang, LU Yuanjian, ZHU Zhouwei, ZENG Yong, ZHU Haibo. Investigation on a cluster of overseas imported COVID-19 in Qingtian County. Preventive Medicine, 2020, 32(7): 678-681.
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http://www.zjyfyxzz.com/CN/10.19485/j.cnki.issn2096-5087.2020.07.007      或      http://www.zjyfyxzz.com/CN/Y2020/V32/I7/678
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