[Action of ultraviolet laser radiation on extracellular and phagocytic Mycobacteria tuberculosis in vitro].

Ultraviolet laser radiation (a wavelength of 248 nm) was examined in vitro for its bacteriostatic and bactericidal actions on M. tuberculosis H37Rv. Sterilization was achieved when a dose of 10 m/J/cm2 was applied. This indicates that this type of radiation suppresses both the formation of colonies upon exposure of free Mycobacteria in the suspension and the incorporation of 3H-uracil by the mycobacteria phagocytized with peritoneal macrophages.