ABSTRACT
The results of studies made with the aim of selecting conditions for inducing immune response to P.pseudomallei are presented. The study revealed that the dose of the antigen, the amount of macrophages and the development of the process in stages are the decisive factors for inducing immune response. The proliferation of macrophages till their predominance in the culture was found to depend on the dose of the antigen. Some mitogens increased the antigen-induced proliferation of macrophages. The intensive in vitro synthesis of specific antibodies was observed at minimal doses of the antigen and the moderate content of macrophages. Under the action of mitogens and large doses of the antigen which induced the proliferation macrophages antibody synthesis was absent.