Influenza disease was already there from earlier times. Because disease very easily spread, has occurred several times with the cause of pandemic influenza viruses of different influenza A subtype. Spanish flu which occurred in 1918 in which the cause was influenza A virus subtype H1N1 and make 40-50 million people died. Asian flu caused by influenza A virus subtype H2N2 occurred in 1957 also made a lot of casualties. Then in 1968 arising pandemic caused by H3N2 influenza with a death toll of about 1 million people.
Outbreaks of avian influenza caused by influenza A subtype H5N1 virus began to be known in 1997 in Hong Kong, With source of infection and spread from poultry farms. Furthermore, rapidly spread across the world to become global.
The development of avian flu occurring in Indonesia are also very fast since the virus was found in 2004, namely the birds and then spread rapidly in humans.
With the high number of deaths from avian flu, we need to be vigilant for this disease does not develop into a pandemic. For that preventive measures should be taken individually or in the environment.
Avian influenza is a disease penyalit caused by influenza viruses that are transmitted by birds, in this case chickens, ducks, birds, geese, turkeys and other.
Actually avian influenza disease is in animals (zoonoses). However, in its development, the virus that causes the disease have mutations that cause this virus can be transmitted to humans. Avian influenza can affect the whole nation and cause a pandemic in 2-3 year.
In domestic poultry, infection with avian influenza viruses causes two forms of the disease that is the form of low pathogenicity (low pathogenic) and the highly pathogenic form (high-pathogenic). Form of low pathogenicity and disease does not kill often called Low Pathogenic Avian Influenza Viruses. Causes only mild symptoms and is usually not detected. The disease is transmitted carriers of avian influenza virus to domestic poultry. While the pathogenic form called Highly Pathogenic Avian Influenza Viruses. Cause symptoms are very severe, and contagious diseases of the organ-menyabbakan organtybyh poultry. The death rate of 100% in just 48 hours in poultry. Examples of this virus is H5N1.