Document Type : Original Article
live viral vaccines for poultry diseases, CLEVB,Abbasia Cairo
virology veterinary medicine Benha university
Department of Virology, Faculty of Veterinary Medicine, Benha University
poultry diseases and Techniqual manager, CLEVB, Abbasia, Cairo
Even massive vaccination programs, the incidence of Newcastle Disease virus (NDV) outbreaks in Egypt is still frequent with appearing new isolates that need production of new vaccines. In this study, NDV vaccine was prepared by using a new local isolate (NDV/Ch/Giza2014) inactivated by two different chemicals binary ethylenimine (BEI) and formaldehyde. The formaldehyde inactivated NDV (NDVF), BEI inactivated NDV (NDVEI) and imported inactivated Newcastle Disease virus (NDVI) vaccines were examined for generating humoral immune response in different groups of specific pathogen free (SPF) chicks. Vaccinated Chicks by NDVEI vaccine gave higher serum antibody titers than NDVF and NDVI Vaccines using Haemagglutination Inhibition (HI) test. The prepared and imported vaccines gave near percentage of protection against the local and the classical strain in chicks. It could be concluded that the locally prepared inactivated NDV vaccines can protect chicken against either homologous or heterologous challenging viruses and the NDVEI Vaccine gave higher protection percentage than NDVF and NDVI Vaccines.