Abstract
Pseudomonas aeruginosa is a Gram-negative bacterium and is clinically significant for opportunistic infections propagated within the hospital environment. In particular, these bacteria are easy to isolate from water-supply environments (e.g. tap, sink). Bactericidal conditions using hot water against three P. aeruginosa clinical isolates, including MDRP and biofilm-forming strain, were assessed. Furthermore, the efficacy of eradication, using hot water, was investigated for P. aeruginosa on the surfaces of water supply environments in hot-spring facilities, a hospital, and a nursing home. All three strains became extinct in contact with hot water at more than 70°C for 5 seconds or more. P. aeruginosa on the water supply environmental surfaces was eradicated by this condition except for two taps in hot-spring facilities. These two taps were of complicated shape, which was thought to be the major cause of eradication failure. The results suggest that hot water eradication should be considered as an option for P. aeruginosa eradication on environmental surfaces in hospitals or nursing homes.
