Ultraviolet C light with wavelength of 222 nm inactivates a wide spectrum of microbial pathogens

Suspensions of S. aureus, P. aeruginosa, E. coli, S. enterica subsp. enterica serovar Typhimurium, C. jejuni, vegetative B. cereus and vegetative C. sporogenes were irradiated with 222- or 254-nm UVC at various irradiation doses, and the numbers of viable bacteria were counted by colony formation. In the case of S. aureus, irradiation with 6 mJ/cm2 reduced the bacterial number 104-fold, and the bacterial number was reduced to an undetectable level when irradiated with 12 mJ/ cm2 of both UVC wavelengths.

1-s2.0-S0195670120301298-main.pdf

Download PDF • 1.19MB