天津宝坻区58例新型冠状病毒肺炎聚集发病流行病学调查

Epidemiological characteristics of 58 cluster cases of novel coronavirus disease in Baodi district of Tianjin city

目的分析新型冠状病毒肺炎确诊病例的首发症状和流行病学特征,为早期诊断新型冠状病毒肺炎,制定疫情防控措施提供科学依据。方法2020年2月21日至2月26日,依据《新型冠状病毒肺炎诊疗方案(试行第六版)》和《新型冠状病毒肺炎防控方案(第五版)》,对"宝坻百货大楼"聚集性疫情爆发以来宝坻区确诊的58例新型冠状病毒肺炎患者的首发症状和流行病学特征进行调查。结果确诊病例中男女比例为0.66:1;48例(82.76%)为30~74岁;首发症状中发热31例(53.45%),咳嗽、咽痛、流涕、鼻塞等呼吸道症状15例(25.86%),乏力、肌肉酸痛7例(12.07%);58例(100%)为聚集性发病,百货大楼员工、顾客、密切接触者先后发病;58例(100%)潜伏期≤14天,平均潜伏期为8.17天,平均潜伏期百货大楼员工<顾客<密切接触者;30例(51.72%)为城区居民,28例(48.28%)为乡村居民。结论宝坻区确诊病例中女性多于男性,30~74岁为高发人群;临床以发热、咳嗽、咽痛、流涕、鼻塞、乏力、肌肉酸痛为主要首发症状;潜伏期均≤14天,其长短与病毒进入感染者体内数量有关;乡村和城区发病无明显差异。

Objective To examine initial symptoms and epidemiological characteristics of confirmed cases of novel coronavirus disease 2019(COVID-19)in Baodi district of Tianjin city for providing evidences to early diagnosis and prevention/control of COVID-19.Methods With case interviews,we conducted a retrospective survey among 58 laboratory confirmed COVID-19 cases in Baodi district of Tianjin city and diagnosed during January 31-February 26,2020 after the epidemic outbreak related to showing up in a department store building in the district.Results Of the 58 cases,6(10.34%)were stuff working in the department store;19(32.76%)were consumers ever showing up in the store;and 33(56.90%)were close contacts of the stuff and consumers;30(51.72%)and 28(48.28%)were urban and rural residents.The male to female ratio of the cases were 0.66:1 and 82.76%(48)of the cases were aged 30-74 years.The initial symptoms of the cases included fever(in 53.45%[31]of the cases),respiratory symptoms such as cough,sore throat,runny nose,and nasal congestion(in 25.86%[15]of the cases),and fatigue and muscle soreness(12.07%[7]).All the cases had an incubation period of≤14 days,with a an average incubation period of 8.17 days.Conclusion For the public place-related COVID-19 cluster outbreak,the majority of the confirmed cases are females and aged 30-74 years;main initial symptoms of the cases are fever,respiratory symptoms,and fatigue and muscle soreness;the incubation period of the cases is less than or equal to14 days.