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Bactericidal effect of ultraviolet-C treatments applied to honey

Short wave ultraviolet light (UV-C) was studied in honey to inactivate vegetative cells of Escherichia coli (CECT 405) and spores of Bacillus subtilis (CECT 12) and Clostridium sporogenes (CECT 553) inoculated at a level of 104–105 CFU/g. UV-C doses ranging from 1.5 to 21.6 J/mL were used passing inoculated honey samples through an UV-C reactor up to 4 times. Lethal effect increased with both the final dose applied and number of passes through the UV-C reactor.  

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