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【medical-news】禽流感再袭柬埔寨
According to officials in Cambodia a second outbreak of bird flu has occurred there this year in southeast Prey Veng, the same province where the H5N1 virus killed a boy in April, about 20 km from the Cambodia-Vietnam border.
Senior Agriculture Ministry official Nou Muth says the virus is back and was confirmed in more than 1,300 ducks that died in Prey Veng province, 70 km southeast of Phnom Penh, but there were no immediate reports of human infections.
Nou Muth says they have announced the outbreak in order to alert villagers not to handle dead poultry.
Virtually all cases of the 130 deaths from the the H5N1 virus, including six in Cambodia, have been contracted through close proximity to infected birds.
Although the virus has not yet demonstrated the ability to mutate into a form that could pass easily between humans, experts fear this could happen, causing a pandemic that might kill millions of people.
This is more feasible in a poor country like Cambodia, which is still recovering from 30 years of civil war and where health systems are basic.
Nou Muth says bird flu is still an issue in the country and they are concerned that villagers in the affected area continue to sell their chickens or ducks to others secretly.
An agriculture official says several hundred domestic ducks, which can carry the H5N1 virus without necessarily showing symptoms, had been culled in within 3 km of the outbreak.
Cambodia's neighbours Thailand and Laos have both recently reported outbreaks of the virus and have also reinvigorated campaigns to control it.
According to the authorities measures have been taken and no outbreaks of the virus have been found in any other areas and no humans have been infected.
To date the H5N1 virus has killed at least 138 people, made many more sick and has been responsible for the deaths of millions of birds and poultry. 禽流感再次肆虐柬埔寨
根据柬埔寨官方消息，今年禽流感在南部Prey Veng省（距柬埔寨和越南边境20km）再次爆发，4月H5N1型病毒致使一名男孩死亡。
农业部部长Nou Muth 声称病毒再次爆发，并证实Prey Veng省内（柬埔寨南部70km处）有超过1300只鸭子死亡，但是暂时还没有人感染报道。
Nou Muth说他们已经宣布这次爆发来提醒村民不要私自处置死家禽。
事实上，所有H5N1型病毒致死的130例中，包括柬埔寨的6例，已经是通过与被感染的鸟类亲密接触传染的。
尽管病毒还没有表现出在人类中易于传播的特点，但是专家担忧这可能会出现，导致大流行使得数以百万的人丧生。
这在像柬埔寨这样正从30年内战中恢复并且医疗系统也很初级的贫穷国家，它们更易发生。
Nou Muth说禽流感是国内面临的一个问题，他们也关注那些疫区的村民是否还在继续私下出售他们的鸡鸭。
一位农业部官员透露几百只国内的鸭子，携带H5N1型病毒没有症状，已经在爆发区3km内被扑杀。
柬埔寨邻国泰国和老挝都报道了病毒的爆发并且已经开始着手控制疫情。
权威数据表明其他地区未见病毒的爆发也没有人员感染。
至今H5N1型病毒已经至少导致138名人员死亡，更多的人生病以及数以百万的鸟类和家禽死亡。 禽流感研究背景知识：
新型禽流感疫苗可应对病毒变异
高致病性禽流感病毒的变异是渐进而非突变过程，中国现有疫苗仍具保护家禽能力，正在筛选的新型疫苗将可应对病毒重大变异。
对于目前流行的所有禽流感毒株，中国现有禽流感疫苗均对家禽有保护能力。科研人员正通过基因序列分析关注禽流感病毒的变异情况 ，并在筛选新的毒株作为疫苗储备。
中国内地实施积极的禽流感免疫政策，免疫手段是世界上最先进和效果最好的。今年初投入使用的禽流感-新城疫重组二联活疫苗，是中国最新自行研制的疫苗，既价格低廉又使用方便，可以用滴鼻、饮水、点眼等多种方式实施，减轻了免疫工作的劳动强度，减少了免疫的风险，更利于免疫工作的开展。
禽流感病毒图解：图片来自SINA
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作者:admin@医学,生命科学 2011-02-18 17:14
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