Abstract
This study was evaluated the inactivation and photoreactivation of a drug resistant Escherichia coli by irradiation with visible light after irradiation with low-and medium pressure UV lamp. When the 3 log inactivation of the drug resistant Escherichia coli which is resistant to six types of antibiotics (ampicillin, gentamicin, cefdinir, kanamycin, tetracycline, sulfamethoxazole, and trimethoprim) , (Six-antibiotic resistant E.coli), and is not resistant to these antibiotics including imipenem and levofloxacin (Non-antibiotics resistant E.coli) was expected in consideration of maximum photoreactivation, the total relative germicidal effective dose was required more than 15mJ/cm2 by the irradiating of low- and medium pressure UV lamps to Non-antibiotics resistant E.coli. Meanwhile, Six-antibiotic resistant E.coli was required to more than 15mJ/cm2 of the total relative germicidal effective dose by irradiating of low pressure UV lamp and 20mJ/cm2 or more by irradiating of medium pressure UV lamp.
