[Effect of He-Ne laser radiation on the bacteriophage T4-Escherichia coli system].

Exposure of T4 bacteriophage, having no red light chromophores, to He-Ne laser (lambda = 632.8 nm) of 10(3)-6 X 10(4) J/m2 does not influence its lytic properties. Irradiation of E. coli WP2 bacteria with doses of 4-6 X 10(3) J/m2 causes a 1.25-1.35-fold increase in their ability to keep on the development of nonirradiated bacteriophage T4.