Treatment of C3H mice bearing solid Gardner lymphosarcoma with vaccine prepared from Corynebacterium parvum combined with methotrexate and Alexan.

C3H mice after transplantation of solid Gardner lymphosarcoma were injected with Methotrexate (MTX) or Alexan. The prolonged survival time of mice treated with antimetabolites was in some cases evidently reduced after an additional injection of Corynebacterium parvum (C.p.). This reduction did not depend on the sequence of corynebacterial vaccine or MTX injections. Significantly better effect of combined treatment with MTX injection and C.p. was found only once in mice preimmunized with the tumor irradiated from 60Co gamma source.