Effect of different laser irradiation on the dysentery bacilli

Lin Ou; Rong Chen; Yanjiao Chen; Depin Li; Caixia Wen

doi:10.1117/12.317877

7 August 1998 Effect of different laser irradiation on the dysentery bacilli

Lin Ou, Rong Chen, Yanjiao Chen, Depin Li, Caixia Wen

Proceedings Volume 3548, Biomedical Optics and Lasers: Diagnostics and Treatment; (1998) https://doi.org/10.1117/12.317877
Event: Photonics China '98, 1998, Beijing, China

Abstract

The S. flexnesi, which have high drug-resistance especially in Cm, Sm, Tc, SD, were irradiated by Ar⁺ laser at 488 nm and semiconductor laser at 808 nm. The experiment results have shown that both Ar⁺ laser and semiconductor laser with power density of 1.7 w/cm² and irradiation dose of 2000 J/cm² can conduce to the bacterial lethality and increase the mutation rates of the bacterial drug-sensitivity, and 'Colony Count' method have the superiority over the 'Inhibacteria Ring' method. At the mean time it further indicate that the high power semiconductor laser would play an important role in the sciences of laser biological medicine. But the effect of the near infrared semiconductor laser is far lower than that of Ar⁺ laser of shorter wavelength at the same irradiation dose. It is clear that the output and irradiation dose of near infrared semiconductor laser shall be increased in order to get the same rates of the bacterial lethality and the drug-sensitivity mutation as Ar⁺ laser's.

Citation Download Citation

Lin Ou, Rong Chen, Yanjiao Chen, Depin Li, and Caixia Wen "Effect of different laser irradiation on the dysentery bacilli", Proc. SPIE 3548, Biomedical Optics and Lasers: Diagnostics and Treatment, (7 August 1998); https://doi.org/10.1117/12.317877

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