The lethal effects of Argon (Ar+) LASER upon Pseudomonas aeruginosa isolated from infected wounds in Tikrit teaching hospital

Abstract

The effect of continuous Argon (Ark) LASER with energy of 150 mW and wave length 515 nm and density of energy (CW) 1326.964W/cm2 upon Pseudomonas aeruginosa bacteria after focusing the LASER with a lens of focal length 15 cm for periods ranged between 5 — 25 minutes was studied. This study revealed that the diameters of killing areas exposed to the LASER beam were related directly to the periods of Ar+ LASER beam application and because gausses property of LASER beam the intensity of killing was more in the center and the areas exposed to the LASER beam were distinguished into two areas; the central area was dark in color and the killing in this area was highest, almost all bacteria were killed and killing in this area was incomplete.