Document Type : Research Paper
Authors
1 Tikrit University / College of Education
2 Tikrit University / College of Science
Abstract
The present study has been carried out on (20) samples of Staphylococcus aureus which cause disease for
human being and isolated from wounds that for the inpatients of Tikrit teaching hospital / Orthopedics floor .
The effect of Argon Ion laser of (150) mW , wavelength (515) nm and power density (1326.964) W/cm2
continues (CW) has been studied . The study also includes Helium-Neon He-Ne laser with power of (5) mw and
(632.8 )nm wavelength and power density (113.234) W/cm2 with continues wave (CW) .The present study
shows that the exposure of Staphylococcus aureus bacteria to the Argon ion (Ar+) laser after focusing with a lens
( f = 15 cm ) for periods of time (5,10,15,20,25,30,35)min. The relation between radiated areas of the bacteria
exposured to the argon ion laser and exposure time is directly proportional . Because the Gaussian distribution
of the laser beam , the areas exposed to laser are divided into two areas , the first one was dark ,It lies at center (
the bacteria are totally killed ) . The second is around the first area , It was light ( The bacteria are partially killed
) .The study also shows that the exposure of the similar samples of bacteria to Helium-Neon(He-Ne) Laser
under the same conditions dose not show significant effect .
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