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Reduction of E. coli O157:H7 (a), S. Typhimurium (b), and L. monocytogenes (c) cells on each selective medium (E. coli O157:H7; sorbitol MacConkey agar, S. Typhimurium; xylose lysine desoxycholate, L. monocytogenes; Oxford agar base with antimicrobial supplement) treated with a 254-nm UV-lamp and 266-nm UV-LED PCBs at 0.1, 0.2, 0.5, and 0.7 mJ/cm2.
