UV-C inactivation of microorganisms in droplets on food contact surfaces using UV-C light-emitting diode devices

The main objective of this study was to investigate the effectiveness ultraviolet light (UV-C) emitting diodes for decontamination stainless steel food contact surfaces. Listeria monocytogenes (ATCC 19115), Escherichia coli 25922), and Salmonella enterica serovar Typhimurium 700720) were chosen as challenge microorganisms. Target microorganisms subjected UV-C dosages 0, 2, 4, 6, 8 mJ cm −2 at an average fluence 0.163 mW/cm 2 using a near-collimated beam operating 279 nm wavelength. showed lower sensitivity compared followed first-order kinetics. reduced by more than 3-log 10 cycles maximum UV dosage 12 . In contrast, Weibull model with apparent shoulder in initial doses. A reduction 4.4-log achieved highest exposure level. This that LED devices represent excellent alternative inactivation foodborne droplets. Results clearly demonstrate can serve additional sanitation method routine cleaning practices, which are commonly utilized industry.