Nat Commun:微生物所在H7N9禽流感病毒动态重配模式研究方面取得重要进展

2014-01-26 微生物学报 微生物学报

2013年3月,我国上海和安徽地区首先发现了人感染H7N9亚型禽流感病毒,并造成人死亡。之后,病毒快速传播至我国14个省、市、自治区和特别行政区,感染人数超过200人。尤其是在最近数周时间(新的流感季),我国东南部地区又出现了新的发病高峰。因此,理清病毒的演化和流行模式对于禽流感的防控至关重要。 中国科学院微生物研究所和国家CDC,江苏省CDC,杭州市CDC,泰山医学院等单位利用100多株H7N

2013年3月,我国上海和安徽地区首先发现了人感染H7N9亚型禽流感病毒,并造成人死亡。之后,病毒快速传播至我国14个省、市、自治区和特别行政区,感染人数超过200人。尤其是在最近数周时间(新的流感季),我国东南部地区又出现了新的发病高峰。因此,理清病毒的演化和流行模式对于禽流感的防控至关重要。 【原文下载】

中国科学院微生物研究所和国家CDC,江苏省CDC,杭州市CDC,泰山医学院等单位利用100多株H7N9禽流感病毒的基因信息,对于系统发生、溯祖、病毒分型以及遗传谱系进行了分析。绘制了H7N9禽流感病毒的动态重配模式和传播路径。该研究成果于2014年1月24日,在国际著名学术期刊《自然》子刊《自然通讯》(Nature Communications)在线发表。

研究表明,H7N9病毒的重要基因HA和NA没有发生抗原转变,结合流行病学调查,病毒人传人的可能性极小。但是,目前病毒的内部基因重配比较复杂,没有规律性,表明病毒在家禽和人中并没有适应,还处于快速的变异期。尤其是在家禽中,H7N9病毒和H9N2病毒的动态重配(dynamicreassortments)非常普遍,并依此对病毒自身的适应性进行遗传调整(genetictuning)。研究结果还显示,家禽运输对于病毒的传播具有重要作用。

因此,我们认为控制人感染H7N9禽流感病毒最重要的是控制禽到人的传播路径。做好活禽市场的消毒防卫措施,定期进行活禽市场和家禽运输的监控将能够很好的控制病毒的传播与流行,有效降低人感染H7N9禽流感病毒的风险。

该研究工作是在高福研究员领导下完成的,获得了科技部973项目、基金委项目和中科院项目的资助。

图一:目前出现的27种H7N9病毒基因型

图二:H7N9病毒传播路径以及传播中的基因型变化

图三:H7N9病毒动态重配模式图


原文出处:Cui L1, Liu D2, Shi W3, Pan J4, Qi X1, Li X5, Guo X6, Zhou M6, Li W7, Li J8, Haywood J9, Xiao H10, Yu X8, Pu X8, Wu Y9, Yu H6, Zhao K6, Zhu Y6, Wu B6, Jin T11, Shi Z6, Tang F6, Zhu F6, Sun Q7, Wu L7, Yang R12, Yan J9, Lei F13, Zhu B9, Liu W9, Ma J7, Wang H6, Gao GF14.Dynamic reassortments and genetic heterogeneity of the human-infecting influenza A (H7N9) virus.Nat Commun. 2014 Jan 24;5:3142. doi: 10.1038/ncomms4142. 【原文下载】

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    2014-05-12 liuli5079
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    2014-06-06 liye789132251
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中新网1月23日电 据浙江省卫计委网站消息,浙江省卫生计生委23日通报,浙江今日新增5例人感染H7N9禽流感病例:  1、患者陈某某,女,66岁,退休,绍兴越城区人。1月22日确诊为人感染H7N9禽流感病例。现病情危重,在绍兴某医院治疗。  2、患者王某某,女,71岁,退休,杭州江干区人。1月22日确诊为人感染H7N9禽流感病例。现病情危重,在杭州某医院治疗。  3、患者徐某某,男,71岁,农民,

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自2013年3月以来,中国上海、浙江和安徽等地区出现人感染H7N9禽流感病毒疫情,众多的研究单位和学者进行了较为细致的病原学研究,揭示了H7N9禽流感病毒对人的高致病性,对禽类的低致病性以及这个病毒是一个基因重配的新亚型禽流感病毒。但是它究竟是怎么来的?源头是什么?中国科学院动物研究所野生动物疫病研究组何宏轩研究员带领的团队与杭州疾病预防控制中心进行密切合作,收集了杭州市人感染病例密集地区周边的活