文章摘要
吴双胜,任振勇,孙瑛,张姣姣,赵海,窦相峰,马春娜,贾蕾,杨鹏,庞星火.北京市一起冷链相关新型冠状病毒Delta变异株聚集性疫情的溯源调查[J].中华流行病学杂志,2022,43(8):1230-1236
北京市一起冷链相关新型冠状病毒Delta变异株聚集性疫情的溯源调查
Survey on infection source of a cold-chain product associated COVID-19 epidemic caused by 2019-nCoV Delta variant in Beijing
收稿日期:2022-02-28  出版日期:2022-08-13
DOI:10.3760/cma.j.cn112338-20220228-00157
中文关键词: 新型冠状病毒肺炎  新型冠状病毒  Delta变异株  冷链  感染来源
英文关键词: COVID-19  2019-nCoV  Delta variant  Cold-chain  Source of infection
基金项目:北京市科技计划(Z211100002521019,Z211100000221019);北京市优秀人才培养资助(2018000021469G297)
作者单位E-mail
吴双胜 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
任振勇 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
孙瑛 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
张姣姣 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
赵海 北京市疾病预防控制中心学校卫生所, 北京 100013  
窦相峰 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
马春娜 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
贾蕾 北京市疾病预防控制中心传染病地方病控制所, 北京 100013  
杨鹏 北京市疾病预防控制中心办公室, 北京 100013 yangpengcdc@163.com 
庞星火 北京市疾病预防控制中心办公室, 北京 100013  
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中文摘要:
      目的 对北京市一起冷链相关新型冠状病毒(新冠病毒)Delta变异株聚集性疫情进行溯源调查,分析其感染来源和传播链。方法 应用流行病学调查方法核查病例的活动轨迹,对活动轨迹涉及的风险点位进行密切接触者追踪、人员和环境采样核酸检测,对核酸阳性标本进行基因测序分析。结果 2022年1月18日至2月6日,共报告112例新冠病毒感染者,除1例待查外,其余111例存在明确的流行病学关联。感染来源为进口冷冻货品外包装,2021年1月进口冷冻货品捕捞后储存于东南亚地区某国冷库,2021年6月包装后发送到我国北京市A区A冷库存储,随后分批次于2022年1月起在B区B冷库贴标销售,首发病例在搬运阳性冷冻货品期间发生感染,继而造成共同工作、就餐和居住在B冷库及其毗邻的C冷库和D餐厅(两库一店)所在区域的人员感染,涉及77例两库一店直接相关病例。在两库一店区域外还造成16个传播支链,涉及35例病例。结论 本起疫情提示进口冷链货品外包装污染输入疫情的风险,应继续加强冷链行业管理。
英文摘要:
      Objective To investigate the source and the transmission chain of a cold-chain product associated COVID-19 epidemic caused by 2019-nCoV Delta variant in Beijing. Methods Epidemiological investigation were used to verify the exposure points of the cases. Close contacts were traced from the exposure points, and human and environmental samples were collected for nucleic acid tests. Positive samples were analyzed by gene sequencing. Results A total of 112 cases of COVID-19 were reported in the epidemic from January 18 to February 6, 2022 in Beijing. Except for 1 case was uncertain, there were epidemiological links among 111 cases. The source of infection was the packages of imported cold-chain products from Southeast Asia, which were harvested and stored in a local cold-storage in January 2021, and packaged and sent to the cold-storage A in A district in June 2021, and then sold in batches in cold-storage B in B district from January 2022. The first case was infected in the handling of positive frozen products, and then 77 cases occurred due to working, eating and living together with the index case in the cold-storage B, cold-storage C and restaurant D. Besides the cold-storage B, C and the restaurant D, there were 16 sub-transmission chains, resulting in additional 35 cases. Conclusion The epidemic indicated that the risk of 2019-nCoV infection from imported cold-chain products contaminated by package and highlighted the importance to strengthen the management of cold-chain industry in future.
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