Objective To prepare the monoclonal antibody against gB protein of infections bovine rhinotracheitis virus(IBRV) and develop a double antibody sandwich ELISA method.Methods BALB/c mice were immunized with recombinant IBRV gB protein to prepare monoclonal antibody by hybridoma technique,and rabbits were immunized with whole IBRV to prepare polyclonal antibody.The working concentrations of prepared monoclonal and polyclonal antibodies were optimized by block titration,based on which a double antibody sandwich...