Blue light destroys MRSA
Posted on: Friday, 30 January 2009, 15:25 CST
Two common strains of methicillin-resistant Staphylococcus aureus were virtually eradicated by exposing them to a wavelength of blue light, researchers said.
In a process called photo-irradiation, Chukuka S. Enwemeka, Deborah Williams, Sombiri K. Enwemeka, Steve Hollosi and David Yens of the New York Institute of Technology, in Old Westbury, N.Y., exposed bacterial colonies of MRSA to various doses of 470-nm light, which emits no UV radiation.
The two MRSA populations studied -- the US-300 strain of CA-MRSA and the IS-853 strain of HA-MRSA -- represent prominent community-acquired and hospital-acquired strains of MRSA, respectively.
The study authors report that the higher the dose of 470-nm blue light, the more bacteria were killed. High-dose photo-irradiation was able to destroy 90.4 percent of the US-300 colonies and the IS-853 colonies.
The effectiveness of blue light in vitro suggests that it should also be effective in human cases of MRSA infection, and particularly in cutaneous and subcutaneous infections, the researchers said.
The findings are published online ahead of print in Photomedicine and Laser Surgery.
Source: United Press International
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