Inactivation of Vibrio parahaemolyticus Unattached and Attached to a Solid Surface in pH-Controlled Sodium Hypochlorite Solutions
| Autor: | Kazuhiro Takahashi, Reiji Tanaka, Satoshi Fukuzaki |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
biology Solid surface Vibrio parahaemolyticus 030106 microbiology Public Health Environmental and Occupational Health chemistry.chemical_element Calorimetry biology.organism_classification Applied Microbiology and Biotechnology 03 medical and health sciences chemistry.chemical_compound Reaction rate constant Biochemistry chemistry Sodium hypochlorite Desorption Chlorine Polyethylene terephthalate Nuclear chemistry |
| Zdroj: | Biocontrol Science. 21:265-268 |
| ISSN: | 1884-0205 1342-4815 |
| Popis: | The inactivation of Vibrio parahaemolyticus cells that were unattached or attached to a polyethylene terephthalate (PET) disc in pH-controlled sodium hypochlorite (NaOCl) solutions was studied under turbulent conditions. No significant desorption of attached cells occurred at the free available chlorine (FAC) concentrations from 0.1 to 1.0 mg/l. The number of viable cells was estimated by microbial calorimetry. The logarithmic relative reduction of viable cells was proportional to the product of the FAC concentration and time. In the pH range of 5.6 to 9.3, the first-order inactivation rate constants for unattached and attached cells increased with decreasing solution pH. It was found that the rate constants for unattached cells were approximately 6 to 7 times higher than those for attached cells at all pH values examined. It was confirmed that attached cells were more resistant to NaOCl solutions than unattached cells even when accessibility of attached cells to HOCl/OCl- was enhanced under turbulent conditions. |
| Databáze: | OpenAIRE |
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