H7N9 viruses into a "superbug"? | disease control | _ H7N9| virus news
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Beijing News Alerts (reporter Li Dandan) last winter to this spring, H7N9 avian flu outbreak occurs in China. The outbreak of the virus in a number of new features, then H7N9 already or will in the future become a "superbug"? In this regard, the Chinese Center for disease control and prevention, said today that the answer is no.
H7N9 avian flu since the outbreak of viruses from the spring of 2013, through a total of 5 peak, compared with the previous 4, 5th wave of the epidemic in the number of cases increased significantly greater and broader scope, distribution. In addition, in some cases, live poultry markets and environmental samples were found in poultry of highly pathogenic H7N9 avian influenza virus mutants; individual strains reduced susceptibility to drugs such as Tamiflu, peramivir.
So, H7N9 already or will in the future become a "superbug"? Disease control in this, the answer is no.
CDC explained, similar to the other subtype of avian influenza virus, H7N9 virus through direct contact with live birds or people of infection after exposure to live poultry-related environment. Direct contact with live birds, including in the absence of effective protection cases, hands touching live poultry fresh killed poultry or poultry or their blood, internal organs, eggs, secretions, excretions, such as biomass. Exposure to live poultry-related environment usually has to have live birds or live birds related to contaminated sites, such as live bird markets or selling live poultry stalls, and so on. H7N9 currently does not have a seasonal flu virus that sustained person-to-person transmission capacity, will not cause a pandemic.
Therefore, at present, despite individual H7N9 strain of neuraminidase drugs (such as Tamiflu, peramivir) resistance, but the vast majority of H7N9 avian flu virus is sensitive to these drugs, the drug is still effective drugs to treat H7N9. In addition, the who global influenza vaccine recommended in the end of February will be updated H7N9 strain, for H7N9 early to prepare.
Worth noting is that infected H7N9 avian flu outbreaks since the beginning of winter last year compared with the previous year has increased significantly, in order to reduce populations live or its related environmental exposure and several provinces in China for live poultry markets, operation of live birds and poultry transportation had taken strict measures and epidemic prevention and control effect in relevant area.
But, in the disease control reminded, crowd on H7N9 virus no immunity, and H7N9 virus infection Hou led to of high proportion heavy syndrome cases and high mortality serious against people life health security, so must has been on its keep alert, only continued advance modern farming, and improve biological security management level, and close live poultry market and change sales mode,, party has may from source Shang prevent people infection avian influenza virus.
> Editors: Dong Zhang
Article keywords:CDC H7N9 virus
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H7N9
病毒会变成“超级
病毒”？|疾控|H7N9|
病毒_新闻资讯
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新京报快讯（记者 李丹丹）去年冬季到今年春季，H7N9禽流感疫情在中国多地出现。此次疫情中该病毒出现了一些新的特点，那么H7N9是否已经或者将来会成为一个“超级病毒”？对此，中国疾病预防控制中心今日表示，答案是否定的。
H7N9禽流感病毒从2013年春季暴发以来，共经历了5个发病高峰，与前4波相比，第5波疫情中病例数显著增加、波及范围更广、散发程度更高。此外，在部分地区的病例、活禽市场以及环境样本中发现了对禽高致病性的H7N9禽流感病毒变异株；个别毒株对达菲、帕拉米韦等药物的敏感性降低。
那么，H7N9是否已经或者将来会成为一个“超级病毒”？中疾控对此表示，答案是否定的。
中疾控解释称，与其它亚型禽流感病毒类似，H7N9病毒主要通过直接接触活禽或暴露于活禽相关环境后感染人。直接接触活禽包括在未采取有效防护的情况下，用手触碰活禽或鲜杀禽的禽体或其血液、内脏、禽蛋、分泌物、排泄物等生物物质。暴露于活禽相关环境通常指曾到过有活禽活动或存在活禽相关污染的场所，例如活禽交易市场或活禽售卖摊点等。H7N9病毒目前并不具备季节性流感病毒那种持续的人际传播能力，尚不会造成流感大流行。
因此，目前虽然出现个别H7N9毒株对神经氨酸酶类药物（如达菲，帕拉米韦等）耐药，但绝大多数H7N9禽流感病毒对此类药物是敏感的，此类药物仍是临床治疗H7N9的有效药物。此外，世卫组织在2月底结束的全球流感疫苗推荐会上更新了H7N9疫苗株，为应对H7N9提早进行准备。
值得注意的是，去年入冬以来人感染H7N9禽流感疫情较往年大幅度上升，为了有效降低人群的活禽或其相关环境暴露风险，中国多个省份针对活禽市场、活禽经营和禽类调运采取了严格措施，相关地区疫情防控效果明显。
不过，中疾控提醒，人群对H7N9病毒没有免疫力，而H7N9病毒感染后导致的高比例重症病例和高死亡率严重危害人民生命健康安全，因此必须一直对其保持警惕，只有持续推进现代化养殖、提高生物安全管理水平、关闭活禽市场以及改变销售模式等，方有可能从源头上防止人感染禽流感病毒。
>责任编辑：张冬
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