|
|
Investigation on a cluster of coronavirus disease 2019 in Pingyang County |
WANG Keshun, YE Zhihao, ZHANG Ding
|
Department of Infectious Disease Prevention and Control,Center for Disease Control and Prevention Pingyang,Zhejiang 325401,China |
|
|
Abstract Objective To investigate a cluster of coronavirus disease 2019 (COVID-19) in Pingyang County,and to put forward targeted prevention and control suggestions. Methods According to the Prevention and Control Plan of COVID-19 (Third Edition),we carried out epidemiological investigation to collect the information of demographic features,diagnosis and treatment,clinical manifestations,laboratory examination,exposure history and close contact. We analyzed the mode and frequency of exposure,so as to figure out the route of transmission. Results This epidemic resulted in 6 confirmed cases of COVID-19 and 3 asymptomatic cases,with an attack rate of 6.52% (9/138). The median age of the cases was 48 years old. The confirmed cases mainly had imaging features of pneumonia, fever and cough. Their incubation period ranged from 4 to 9 days,and the median was 6 days. The first case,Wang,returned for the funeral of her grandmother from Wuhan with his husband and son on January 18 and lived with her mother. She had cough on January 19,and went to see her grandmother during January 19 to 23. She had contact with 6 cases,and the other 2 cases were Wang's mother and husband,who lived with Wang. All the cases except Wang had no COVID-19 related symptoms before the funeral,no contact history of COVID-19 cases or no other common exposure history except during the funeral. Therefore,Wang was determined as the source of the epidemic,staying in the same room and eating at the same table with her were risk factors for the infection of COVID-19 in this epidemic (P<0.05). Conclusions This was a local clustering epidemic caused by COVID-19 imported cases from Wuhan. It spread mainly by close contacts like staying in the same room and eating at the same table.
|
Received: 18 February 2020
Published: 19 March 2020
|
|
|
|
|
[1] 中华人民共和国国家卫生健康委员会. 国家卫生健康委关于修订新型冠状病毒肺炎英文命名事宜的通知[EB/OL].(2020-02-22)[2020-02-26]. http://www.nhc.gov.cn/xcs/zhengcwj/202002/6ed7614bc35244cab117d5a03c2b4861.shtml. [2] 中华预防医学会新型冠状病毒肺炎防控专家组.新型冠状病毒肺炎流行病学特征的最新认识[J].中华流行病学杂志,2020,41(2):139-144. [3] 中华人民共和国国家卫生健康委员会. 国家卫生健康委办公厅关于印发新型冠状病毒感染的肺炎防控方案(第三版)的通知[EB/OL].(2020-01-28)[2020-02-26].http://www.nhc.gov.cn/xcs/zhengcwj/202001/470b128513fe46f086d79667db9f76a5.shtml. [4] 中华人民共和国国家卫生健康委员会,中华人民共和国国家中医药管理局.关于印发新型冠状病毒感染的肺炎诊疗方案(试行第四版)的通知[EB/OL].(2020-01-27)[2020-02-26].http://www.nhc.gov.cn/yzygj/s7653p/202001/4294563ed35b43209b31739bd0785e67.shtml. [5] HUANG C, WANG Y,LI X,et al.Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China[J]. Lancet,2020,395(10223):497-506. [6] 唐安,仝振东,李科峰,等.舟山市新型冠状病毒肺炎病例流行病学特征分析[J].预防医学,2020,32(2):113-116. [7] 中国疾病预防控制中心新型冠状病毒肺炎应急响应机制流行病学组. 新型冠状病毒肺炎流行病学特征分析[J].中华流行病学杂志,2020,41(2):145-151. [8] 中华人民共和国国家卫生健康委员会中华人民共和国国家中医药管理局,. 关于印发新型冠状病毒肺炎诊疗方案(试行第六版)的通知[EB/OL].(2020-02-19)[2020-02-26].http://www.nhc.gov.cn/xcs/zhengcwj/202002/8334a8326dd94d329df351d7da8aefc2.shtml. [9] 凌锋,刘社兰,倪朝荣,等.浙江省首例新型冠状病毒肺炎报告病例流行病学调查[J].预防医学,32(2):109-112. |
|
|
|