* Domestic Ducks and H5N1 Influenza Epidemic, Thailand

In addition to causing 12 human deaths and 17 cases of human infection, the 2004 outbreak of H5N1 influenza virus in Thailand resulted in the death or slaughter of 60 million domestic fowl and the disruption of poultry production and trade. After domestic ducks were recognized as silent carriers of H5N1 influenza virus, government teams went into every village to cull flocks in which virus was detected; these team efforts markedly reduced H5N1 infection.

Here we examine the pathobiology and epidemiology of H5N1 influenza virus in the 4 systems of duck raising used in Thailand in 2004. No influenza viruses were detected in ducks raised in “closed” houses with high biosecurity. However, H5N1 influenza virus was prevalent among ducks raised in “open” houses, free-ranging (grazing) ducks, and backyard ducks.
Thaweesak Songserm et al


* Avian influenza ("bird flu") and the significance of its transmission to humans

The disease in birds: impact and control measures Avian influenza is an infectious disease of birds caused by type A strains of the influenza virus. The disease, which was first identified in Italy more than 100 years ago, occurs worldwide.


* Key Facts About Avian Influenza (Bird Flu) and Avian Influenza A (H5N1) Virus

Bird flu is an infection caused by avian (bird) influenza (flu) viruses. These flu viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, bird flu is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them.
avian flu facts


* Influenza summary page

Avian Influenza (AI) or "Bird Flu" is a highly contagious viral infection which can affect all species of birds and can manifest itself in different ways depending mainly on the pathogenicity of the virus involved and on the species affected.