title: Inactivation of bacteria in freshwater by momentary decompression following high pressurization.
abstract: Rapid and continuous pressure treatment was realized using a hydraulic pump and the momentary decompression following high pressurization was used to inactivate bacteria. The number of colony-forming E. coli decreased to 1/1000 in response to 10 cycles of pressure treatment. In groundwater samples, repeated pressure treatment led to a two-log decrease in the number of colony-forming bacteria. These findings suggest that repeated cycles of momentary decompression following high pressurization enabled a marked decrease in bacterial growth activity. The results presented herein may contribute to microbiological quality control and the safety of freshwater.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Baba
authors.forename: Nobuyasu
authors.initials: N
authors.lastname: Yamaguchi
authors.forename: Katsuji
authors.initials: K
authors.lastname: Tani
authors.forename: Masao
authors.initials: M
authors.lastname: Nasu
mesh_terms: D004203:Disinfection / Q000295:instrumentation / Q000379:methods*; D004926:Escherichia coli / Q000737:chemistry / Q000254:growth & development*; D005618:Fresh Water / Q000382:microbiology*; D050296:Microbial Viability; D011312:Pressure