高海军, 张颋, 许光荣, 叶萍, 秦忠雪, 段勇军. 四川省甘孜藏族自治州新型冠状病毒肺炎病例流行病学特征分析[J]. 疾病监测, 2020, 35(9): 793-797. DOI: 10.3784/j.issn.1003-9961.2020.09.006
引用本文: 高海军, 张颋, 许光荣, 叶萍, 秦忠雪, 段勇军. 四川省甘孜藏族自治州新型冠状病毒肺炎病例流行病学特征分析[J]. 疾病监测, 2020, 35(9): 793-797. DOI: 10.3784/j.issn.1003-9961.2020.09.006
Haijun Gao, Ting Zhang, Guangrong Xu, Ping Ye, Zhongxue Qin, Yongjun Duan. Epidemiological characteristics of coronavirus disease 2019 outbreak in Ganzr Tibetan Autonomous Prefecture, Sichuan[J]. Disease Surveillance, 2020, 35(9): 793-797. DOI: 10.3784/j.issn.1003-9961.2020.09.006
Citation: Haijun Gao, Ting Zhang, Guangrong Xu, Ping Ye, Zhongxue Qin, Yongjun Duan. Epidemiological characteristics of coronavirus disease 2019 outbreak in Ganzr Tibetan Autonomous Prefecture, Sichuan[J]. Disease Surveillance, 2020, 35(9): 793-797. DOI: 10.3784/j.issn.1003-9961.2020.09.006

四川省甘孜藏族自治州新型冠状病毒肺炎病例流行病学特征分析

Epidemiological characteristics of coronavirus disease 2019 outbreak in Ganzr Tibetan Autonomous Prefecture, Sichuan

  • 摘要:
    目的探讨2020年四川省甘孜藏族自治州(甘孜州)暴发的新型冠状病毒肺炎(COVID-19)疫情的病例特征及流行趋势,旨在为遏制本地疫情扩散及外地疫情输入提供科学依据。
    方法参照《新型冠状病毒防控方案》、《新型冠状病毒感染的肺炎可疑暴露者和密切接触者管理方案(第二版)》进行流行病学调查与呼吸道样本采集,通过实时反转录–聚合酶链式反应(RT-PCR)方法对其呼吸道样本进行新型冠状病毒(2019-nCoV)核酸检测,并采用描述性流行病学方法对病例特征、疫情趋势及聚集性影响因素进行分析。
    结果对54例COVID-19病例的682名密切接触者进行筛查,发现确诊病例39例,无症状感染者3例。 截至2020年2月28日,甘孜州累计报告COVID-19病例96例,其中确诊病例78例,无症状感染者18例。 5例有湖北省武汉市旅居史的输入性确诊病例构成本次疫情流行曲线的早期波峰,本地73例确诊病例及18例无症状感染者通过共同聚集性活动使COVID-19疫情进一步扩散。
    结论甘孜州累计报告COVID-19病例96例,家庭及宗教(寺庙法会及丧葬礼念经)聚集性活动为本次疫情发生的高危传播因素,无症状感染者以中青年人居多,早期对密切接触者进行严格隔离医学观察、对无症状感染者进行及时检测、对高龄确诊病例进行及时救治,可有效降低传染率和死亡率。

     

    Abstract:
    ObjectiveTo understand the epidemiological characteristics of coronavirus disease 2019 (COVID-19) outbreak in Ganzr Tibetan Autonomous Prefecture of Sichuan province in 2020 and provide scientific evidence for the control of local epidemic and the prevention of imported epidemic.
    MethodsEpidemiological survey and respiratory tract sample collection were conducted according to “Protocol of prevention and control of novel coronavirus 2019” and “Management protocol of suspected exposure (to) and close contact with COVID-19 cases (2rd edition)”. Real time RT-PCR was used for the nucleic acid detection of 2019-nCoV, and descriptive epidemiological analysis on cases’ characteristics, epidemic trend and influencing factors were conducted.
    ResultsA total of 682 close contacts of 54 COVID-19 cases were investigated, in which 39 confirmed cases and 3 asymptomatic cases were detected. As of February 28, 2020, a total of 96 COVID-19 cases, including 78 confirmed cases and 18 asymptomatic cases, had been reported in Ganzr Tibetan Autonomous Prefecture. The epidemic was caused by 5 imported cases who had sojourn history in Wuhan. Further spread of COVID-19 resulted from the gathering of 73 local confirmed cases and 18 asymptomatic cases.
    ConclusionA total of 96 COVID-19 cases were reported in the outbreak in Ganzr Tibetan Autonomous Prefecture. Household contact and religious ceremony(dharma assembly in temple and traditional funeral rites)were considered as the high-risk infection ways. Most asymptomatic cases were young or middle-aged adults. Strict isolation of close contacts, timely nucleic acid detection of 2019-nCoV for asymptomatic persons in close contacts and high-quality timely treatment for old-aged confirmed cases could effectively reduce the morbidity and mortality of COVID-19.

     

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