The comparative immunological efficacy of vaccines strains H-120 and MA5+Clon30 used in immunisaition against avian infectious bronchitis

Abstract

This article includes the results of experiments conducted on a flock of chickens. Experiments have been conducted in order to assess the comparative immunological efficacy of different vaccines strains used in immunization against infectious avian bronchitis. There are several approaches when using the different methods of chicken immunization against infectious avian bronchitis, such as monovalent and associated strains vaccines. In this study the immunological efficacy was investigated after the administration of the vaccination with H-120 and Ma5+Clon30 vaccine strains, which were administrated with drenching water and spray method. The better immunological effect was obtained on the group of chickens which were vaccinated with strains Ma5+Clon30.