Tamas Mato

1. IntroductionAmong viral diseases affecting poultry production Newcastle disease (ND) is one of the most common and serious one [1]. It is caused by viruses of genus Orthoavulavirus, Avian orthoavulavirus 1 species [2] formerly designated as Avian avulavirus 1, that are commonly known as Avian paramyxovirus 1 (APMV 1) or Newcastle disease viruses (NDV). The virulent forms of NDV cause a devastat ...