> Initial results show significant differences > between these viruses and strains obtained during > outbreaks of H5N1 avian influenza in Hong Kong, in
> Research has shown that the risk of direct > transmission of H5N1 infection from birds to humans > is greatest in persons having close contact with live > infected poultry.
> in the present situation, the problem of controlling > all human exposures is compounded by the large number > of “back yard” farms where chickens are kept in > rural areas.
しかし糞は要注意。生水も絶対駄目だ。ウイルスは冷凍状態でも
> Studies have shown that infected birds can shed large > amounts of the virus in their faeces. The virus can > survive for long periods in the tissues and faeces of > diseased birds and in water, especially when > temperatures are low. In water, the virus can survive
> 0oC. The virus survives in frozen material > indefinitely.
>They also increase opportunities for human and >avian influenza viruses to exchange genes This can >occur when humans are simultaneously infected by >human and avian influenza viruses. The frequency of >such co-infections increases the likelihood that a >completely new influenza virus subtype might emerge, >carrying sufficient human genes to allow efficient and >sustainable person-to-person transmission.