[Effects of Co-60 gamma irradiation on sensitivity to UV light and photoreactivity of Escherichia coli Bs-1 bacteria].

The reduction of photoreactivity and the change of UV-sensitivity of E. coli Bs-1 bacteria have been demonstrated after irradiation of cells with 60Co gamma-rays. The effect resulted from interaction of sub-damages induced by processes of ionization and excitation. The similar consequences can take place after irradiation of microorganisms with sparsely ionizing radiation of high energy.