Infectious risk factors in the development of malignant neoplasms

: The influence of microorganisms on the course of tumor processes in laboratory animals was studied. The study revealed that the inoculation of Bordetella pertussis decreased survival time both in mice with implanted mastocytoma cells P-815 and in Syrian golden hamsters with implanted transformed hamster fibroblastomas. The smallpox vaccine virus was found to stimulate the development of virus-induced Rauscher leukosis in mice. The mechanisms of the co-carcinogenic action of microorganisms is discussed.