Immunological efficiency of vaccine strains used in imunization against avian infectious bronchitis

Abstract

The article includes the serological investigation about maternal and post vaccination level of specific antibodies titers against bronchitis diseases virus. For vaccination were used “H-120” strains and “Ma5+Clon30” strains, administrated by spray method separate and in combination with the the hydroalcohlic solution of propolis. The level of antibody titers was established with ELISA test. On result was established that the chickens which was vaccinated with vaccine strain “H-120” had lower level of antibody titers which were between 1: 815.727 and 1: 1189.27 comparative with of antibody level of chicken which was vaccinated with vaccine strain “Ma5+Clon30” (1: 1603.02 and 1: 2011.86).