The proposed preparation and methods relate to medicinal microbiology and pharmacology, and relate to preparations exhibiting an immunostimulatory effect, which may be used for the prevention and treatment of oncological diseases. The essence of the preparation and methods consists in a primary component of the preparation including a polyvalent corpuscular antigen, prepared on the basis of Treponema pallidum culture strains. The proposed preparation exhibits an immunostimulatory effect, with a primary influence on components of T-cell immunity. The proposed preparation, in a preventative therapeutic application, is effective with regard to tumors of various histogenesis.