Escherichia coli resistance to chlorine after successive chlorinations

The resistance of Escherichia coli to chlorine in liquid medium was determined after repeated exposures without subculture. The chlorine concentration required to inactivate, in 5 minutes, 50% of a 10 7 bacteria per milliliter population increased from 0.01 mg.l -1 to 0.55 mg.l -1 after 7 exposures....

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Bibliographic Details
Published inEnvironmental technology letters Vol. 5; no. 1-11; pp. 359 - 364
Main Authors Leyval, C., Arz, C., Block, J.C., Rizet, M.
Format Journal Article
LanguageEnglish
Published s.l. Taylor & Francis Group 01.01.1984
Science and Technology Letters
Subjects
Action of physical and chemical agents on bacteria
Bacteriology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Microbiology
Culture medium
Resistance
Chlorination
Chlorine
Escherichia coli
Microorganism culture
Bacteria
Liquid medium
Escherichieae
Enterobacteriaceae
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Summary:The resistance of Escherichia coli to chlorine in liquid medium was determined after repeated exposures without subculture. The chlorine concentration required to inactivate, in 5 minutes, 50% of a 10 7 bacteria per milliliter population increased from 0.01 mg.l -1 to 0.55 mg.l -1 after 7 exposures. Tests performed in parallel showed that after 11 chlorinations the bacteria were slimy and 10 times more resistant to chlorine than the controls.
ISSN:0143-2060
DOI:10.1080/09593338409384286