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从化地区儿童人冠状病毒流行病学与临床特点的观察

来源期刊: 广州医药 | 120-125 发布时间:2021-11-28 收稿时间:2025/11/13 17:50:53 阅读量:15
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关键词:
呼吸道感染冠状病毒临床特点基因
DOI:
10.3969/j.issn.1000-8535.2020.03.026
收稿时间:
2020-02-01 
修订日期:
 
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引用总数:
0  
目的 了解从化地区儿童人冠状病毒((human coronavirus,HCoV)流行情况和临床特点,观察人冠状病毒分型OC43(HCoV-OC43)基因分布特点,探讨从化地区小儿呼吸道感染HCoV-OC43分离株与国内的HCoV-OC43分离株的同源性与基因分型,探讨HCoV-OC43与小儿呼吸道感染疾病的关系,为预防和控制呼吸道疾病提供依据。方法 本研究从化地区2017年1月—2019年6月门诊就诊的6个月~14岁的儿童610例,采集鼻咽拭子标本,病毒检测阳性的患者,这些标本取自患有急性上呼吸道感染或下呼吸道感染疾病的患者,表现出呼吸道感染的症状,例如发热(体温> 37.5℃)、咽痛、流涕、鼻塞、咳嗽和咳痰等。采用荧光定量PCR方法,对HCoV-OC43病毒核酸进行分析和测序。采用直接免疫荧光法检测其他7种常见呼吸道病毒;包括:流感病毒 A、B型(influenza virus,IVA、B)、副流感病毒Ⅰ、Ⅱ、Ⅲ 型 (parainfluenza virus, PIVⅠ、Ⅱ和Ⅲ)、呼吸道合胞病毒(respiratory syncytial virus, RSV)、腺病毒(ad enovirus, ADV)共七种常见呼吸道病毒进行检测,通过HCoV-OC43和常见呼吸道病毒的病毒监测,找出从化地区呼吸道感染患儿HCoV-OC43的N蛋白编码基因的特征。结果 从化地区6月~14岁的呼吸道感染儿童610例,采集鼻咽拭子标本,病毒检测阳性的患者,分析了8种呼吸道病毒,重点分析HCoV-OC43的临床特点。从发病时间月份分布可以看出,人HCoV-OC43主要是在春季流行, HCoV-OC43全年均可检出,春季4月份和5月份检出率较高,冬季较低,但不同月份的检出率无差异。各种常见病毒的发病率,流感病毒A(IVA)111例(18.20%)、流感病毒B(IVB)61例(10.00%)、副流感病毒Ⅰ(PIVⅠ)42例(6.89%)、副流感病毒Ⅱ(PIVⅡ)34例(5.57%)、副流感病毒Ⅲ(PIVⅢ)77例(12.62%)、呼吸道合胞病毒(RSV)135例(22.14%)、腺病毒(ADV) 82例(13.45%),冠状病毒(HCoV-OC43)68例(11.14%)。呼吸道感染多为流感病毒(A+B)和副流感病毒(Ⅰ,Ⅱ,Ⅲ)共325例(53.28%),其次是合胞病毒感染135例(22.14%),腺病毒(ADV) 82例(13.45%),冠状病毒感染最低68例(11.14%)。建立荧光定量PCR方法检测HCoV-OC43 病毒分离及基因分型测序,阳性PCR 产物测序,与HCoV-OC43中N 蛋白基因序列进行比较分析,该地区冠状病毒具有临床多样性,与国内已发表的菌株HCoV-OC43相比具有很高的同源性。结论 人冠状病毒OC43的检出率与以前的报道相符,未发现新的传染性冠状病毒,冠状病毒HCoV-OC43的流行趋势稳定,所有呼吸道感染者均表现出正常的呼吸道感染症状。常见呼吸道病毒检测, 对临床早期诊断和合理用药具有重要意义。
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