Spread of avian influenza culprit: famous birds or poultryWelcome to comment 02012 at 08:26 on January 7
"Things are not so terrible." When "China Science News" correspondent on 6 January by researchers with the Institute of Microbiology, Shenzhen about drivers who report a case of bird flu, researchers say it is dull.In their eyes, every year people were killed in bird flu, no fuss, not to mention large-scale outbreaks.However, as Shenzhen drivers are actually infected poultry or infected by migratory birds, may be a never shrouded in mystery.
Transmission of avian influenza is very strange. According to the associate researcher Liu Di Jieshao, outbreaks of avian flu since 2005, the Institute of Microbiology Chinese Academy of Sciences of the high-Fu group and the Northwest Plateau Institute of Biology Li Hing group, has begun to track migratory birds traces of bird flu has not stopped. 2012, at the beginning of the cold Qinghai-Tibet Plateau, migratory birds has not yet arrived, they temporarily can not obtain data fashion.
Task Force in 2005, an outbreak of avian flu, do migratory birds in Qinghai Lake to find a highly pathogenic virus H5N1, 2006 年 also isolated a lot. By 2007, the migratory birds at Qinghai Lake, the bird flu virus is relatively small, almost disappeared in 2008. However, in 2009 and 2010, another group of fish in the lake gulls, brown-headed gulls and cormorants and other H5N1 viruses isolated from migratory birds at a new branch Clade2.3.2. Vietnam reported the virus and the avian flu virus is very similar.
Task Force co-operation with the Russian researchers found that this virus has been spread to migratory birds in Mongolia and parts of Russia."Clade2.3.2 and Clade2.3.4 branch of poultry in Asia in recent years, the distribution is relatively common in the inland provinces of Hunan, China, Hong Kong and Japan, Vietnam and others have the virus isolates, including poultry in Qinghai is also a performance. So in the end who is the bird flu virus to the birds? "group asked.
If the poultry is infected migratory birds in Qinghai, the Qinghai virus in poultry come from?If it is not spread through the poultry, then what kind of birds brought the virus to Qinghai?Through analysis, research group that birds directly to the interior of the virus with China is unlikely to Qinghai. Speculated that most likely is that the Mainland carrying the virus in poultry in Qinghai, Qinghai infected poultry, poultry and migratory birds in Qinghai were infected. Of course not rule out migratory birds infected with the virus from abroad, which led to the possibility of an outbreak in Qinghai Lake area. But there are a lack of direct evidence. It is understood that the migratory birds carrying avian flu found in Qinghai, the Chinese Academy of Sciences, Wuhan virus researchers, has on the Dongting Lake, Poyang Lake and other waters sampled, there are also isolated from the waters of the avian influenza virus subtype H10N8.Liu Zhai said: "This indicates that migratory birds and poultry carrying the virus may cause environmental pollution, and the existence of the environment as the media led to the spread of avian influenza virus may be."Many people have seen, the current number of waters in the South, poultry and migratory birds fighting for food scene, no one knows the original sin of avian flu.Despite the complexity of transmission of avian influenza, but Chinese scientists did not give up track.In 2010, the national "973 Plan" project the use of genetic models to predict the geographical space the spread of H5N1 avian influenza virus and control strategy.The study hopes to build a massive database analysis, the use of public resources for the database of nucleic acid and protein sequence comparison of the search for potential point mutations meaningful; and build the H5N1 reverse genetics experiment platform, get to deal with H5N1 virus; the same time, save the virus by the cellular industry zoology experimental validation, analysis of the spread of the virus in animals force and virulence.Currently, high-welfare group has the structure of the avian flu virus has been successfully resolved."China Science News" (2012-01-07 http://tech.hexun.com/2012-01-07/137034216.html
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