Beginning in late July , official reports to the OIE from government authorities indicate that the H5N1 virus has expanded its geographical range. Both Russia and Kazakhstan reported outbreaks of avian influenza in poultry in late July, and confirmed H5N1 as the causative agent in early August. Deaths in migratory birds, infected with the virus, have also been reported. Outbreaks in both countries have been attributed to contact between domestic birds and wild waterfowl via shared water sources.
Influenza Book | Avian Influenza
For a small number of bird watchers, the question is not how many species they can spot but what viruses infect the birds. In recent weeks, these bird-watching virologists have become worried about what they and the World Health Organization say is the ''unprecedented'' simultaneous appearance of an avian influenza virus in a number of countries. The worry is that the avian influenza strain, A H5N1 , could combine with a human influenza virus to create a new strain. That strain, in turn, could cause a large epidemic in people. It might even become the seeds of an influenza pandemic that many experts agree is inevitable and possibly imminent. Five deaths attributed to the A H5N1 influenza virus have been confirmed in Vietnam; all are believed to be from direct contact with infected chickens and not from eating poultry or eggs.
Geographical spread of H5N1 avian influenza in birds - update 28
Influenza 2. Avian Influenza 3. Virology 4. Pathogenesis and Immunology 5. Pandemic Preparedness 6.