The study was undertaken to evaluate the protein levels in rabbits affected by a lysate vaccine developed from Pasteurella multocida grown under iron-restricted conditions and lysed by a bacteriophage. Serum proteins include immunoglobulins and complement which mediate humoral immune response and an assessment of protein levels can be of clinical relevance being an indicator of humoral immune response. Two groups of rabbits were immunized with lysate vaccine (LV) and conventional alum precipitated killed HS vaccine (CV) and blood was collected at various days post – immunization (DPI). | Studies on the effect of bacteriophage Lysate of Pasteurella multocida on serum protein levels in rabbits