禽流感卷土重来

伤我心太深

以万计的鸭子正在从西伯利亚向南迁徙，而其中有一部分就携带着H5N1的病毒，这也许会又一次引起欧亚大陆上家禽和人之间的禽流感的再一次流行。

"We're issuing an alert because we expect in the coming weeks to see the virus pop up in unexpected places across a wide area," says Jan Slingenbergh, head of the UN Food and Agriculture Organization's early warning system for animal diseases.

“我们正在发布一项警告，因为我们认为在未来的几周时间内在一片很广大的范围内将会可能出现疫情的泛滥。”Jan Slingenbergh说道，他是UN Food and Agriculture组织中负责动物疫情报告的领导人。

H5N1 has cost poultry farmers an estimated $20 billion so far. It has also infected 565 people, of whom 331 died. Virologists are trying to discover the mutations that could enable H5N1 to spread between people and go pandemic.

H5N1至少已经给农场主们带来了$20 billion（200亿）的损失。它还感染了565人，其中有331人死亡。病毒学家们正在努力寻找使得它突变，并能够在人群中传播流行的原因。

The FAO is concerned about a strain of H5N1, called 2.3.2.1, which has been circulating for several years but is now emerging as dominant in birds in Asia.

FAO（联合国粮食及农业组织）十分担忧H5NA所出现的变异种，称为2.3.2.1。它已经出现了很多年了，但是现在在亚洲的鸟类上大规模地出现。

It is no more virulent than previous strains but it is well adapted to many wild migratory species, so the virus has been carried to countries where H5N1 had been eliminated from poultry, including Bulgaria, Romania and Israel.

这个变种并不先前的更可怕，但是他已经被很多野外迁徙种群中所适应，所以，这种病毒被带到了那些早就不存在H5N1侵害的国度，例如：保加利亚，罗马尼亚和以色列。

H5N1 outbreaks in poultry peaked in 2006, with 4000 across Eurasia and Africa. Extensive culling and vaccination quelled the virus, and by 2008 there were just 302 outbreaks. With the spread of 2.3.2.1, outbreaks are back on the rise. Some samples of the strain in China and Vietnam show its continuing evolution.

H5N1在2006年时大规模爆发，约有4000例病患出现在了欧亚大陆以及非洲。大规模的扑杀和接种疫苗遏制了疫情，到了2008年的时候就只有302例了。但随着2.3.2.1的扩散，疫情又有再度发生的可能。一些从中国和越南取到的样本显示，它还在不断进化。

"The more cases you get in birds, the more it might spill over into humans," says Slingenbergh.

Slingenbergh说道：“在鸟类身上做更多的实验，也许更多的病状就会发生到人类头上。”