humoral immune response of vaccine-i (supermatent from sonicated sporulated oocyst), vaccine –ii (sediment from sonicated sporulated oocyst) and vaccine –iii (un-sonicated sporulated oocyst) against conccidiosis in chickens was determined by indirect haemagglutination (iha) test. iha antibody titre was significantly higher (p

an inactivated trivalent fowl cholera vaccine consisted of serotypes 1, 3 and 4 pasteurella multocida strains was prepared. the vaccine provided 70-100% protection against challenge with homologous starins. elisa assay showed a considerable increase in antibody titer after towice vaccination of 8 weeks chickens. it was found that the trivalent vaccine can induce immunogenic response in vaccinat...