THE H9N2 INFLUENZA VIRUSES FROM THE ISRAELI POULTRY: A FIVE YEAR OUTBREAK

Since 2000, hundreds of H9N2 viruses have been isolated from all types of domestic birds. Although the H9N2 is a low-pathogenicity virus, disease has been observed in all types of poultry in the field. Clinical signs ranged from very mild disease to high morbidity and mortality when the virus was associated with a secondary pathogen. Because of the wide spread of the virus and the great losses it caused, a local vaccination program was...