ISSN:
1745-4565
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The objective of this investigation was to model the influence of the initial microbial concentration on the Escherichia coli resistance to chlorine. A suspension test was used to evaluate the antibacterial efficacy of chlorine. Chlorine doses ranged from 0.6 to 0.9 mL /L, from 0.3 to 0.7 m L /L, from 0.15 to 0.3 mL/L and from 0.1 to 0.2 mL /L when the initial microbial concentration was 1.2 × 108, 6 × 107, 6 × 106and 6 × 105 CFU/mL, respectively. In order to describe the survival curves of E. coli, a mathematical model based on a biphasic inactivation was used. Initial microbial concentration had a significant influence on the kinetics of inactivation and on the resistance of E. coli to chlorine. In order to obtain a good repeatability and reproducibility of the bacterial suspension test, the initial concentration of bacterial suspensions should be evaluated and standardized.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1745-4565.2005.00566.x
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