[An immunochemical study of the antigenic profile of cultured strains of Treponema pallidum].

Antigenic profile of T. pallidum culture strains was under study. To prove the presence of 'active' antigenic substances with antibodies in the blood sera of syphilitics, the authors have employed immunization with antigen preparation and reimmunization with antigen precipitate from syphilitics' blood sera. Crossed immunoelectrophoresis has detected up to 25 antigenic components in US-treated culture strains. Five of these contributed to the formation of the specific precipitate from syphilitics' blood sera pool.