Time Salmonella Typhimurium Escherichia coli O157:H7 Listeria monocytogenes Day 0 1.0 ± 0.15a 0.6 ± 0.1a 5.6 ± 0.1a Day 1 3.5 ± 0.3a 6.2 ± 0.1b 5.5 ± 0.01a Day 2 6.3 ± 0.1c 6.1 ± 0.01b 5.5 ± 0.1a

conditions after exposure to the sanitizing agent. Carpet coupons inoculated with 3 different pathogenic bacteria were treated with titanium dioxide and incubated in the presence of light. Viability analyses were conducted over 2-days.

Table 2: Log reduction of pathogenic bacteria on carpet coupons incubated in light.