The bactericidal effect of simultaneous titanium oxide on common hospital bacteria.

Bacteria prevalence has increased in health centers and hospitals. Infection control can decrease the number of bacteria. Bacteria cause 90% of nosocomial infections and fungi, viruses, or protozoa are less involved. Bacteria control can decrease the number of diseases. The Simultaneous titanium oxide (SMTiO) is a new method of disinfection. This process degrades bacteria by producing hydroxyl radical. The present study was conducted with the aim of analyzing the bactericidal effect of simultaneous titanium oxide on common hospital bacteria. In this study, SMTiO system was placed under a laminar hood. Escherichia coli, Klebsiella pneumonia, Staphylococcus aureus, Pseudomonas aeruginosa, and Citrobacter freundii were selected as common hospital bacteria. Treatment operations were conducted at the bacteria concentration 106 cells/mL and the exposure times of 1 to 48 h. Then, the bacteria colonies were counted and removal rate calculated separately each of the bacteria. Finally, data analysis was conducted by using one-way ANOVA. Results showed that E. coli and C. freundii had the highest removal rate (40%) and the lowest removal (14%), respectively. Results confirmed that SMTiO can degrade Gram-positive and Gram-negative bacteria, but its effects were lower on Gram-positive bacteria. Results showed that removal efficiency increased gradually during exposure periods. We recommend that future studies should analyze the structure of bacteria after the treatment with SMTiO.