Adenoviruses are common infectious agents of poultry. The avian adenoviruses are divided into three groups i.e. group ?, group ? and group III. Group ? is composed of 5 species (A to E) and 12 serotypes (FAdV-1 to FAdV12) of avian adenoviruses of chickens, turkeys, goose and duck [1-3]. The group ? adenoviruses are famous for causing hydropericardium-syndrome in chickens (caused by FAdV-4 strains), Quail Bronchitis in quail (caused by FAdV-1) and inclusion body hepatitis [4-6]. Group ? of avian adenoviruses causes hemorrhagic enteritis in turkeys, marble spleen disease in pheasants and splenomegaly in chickens. Group ? viruses have a common group antigen that differentiates them from group ? [7].