Vs. Brozel et al., RESISTANCE OF BACTERIAL CULTURES TO NONOXIDIZING WATER-TREATMENT BACTERICIDES BY ADAPTATION, Water science and technology, 31(5-6), 1995, pp. 169-175
Citations number
19
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Bacterial communities in water cooling systems treated with bactericid
es often become resistant to these bactericides. This has been ascribe
d to selection for resistant cells. Certain bacteria, having a high in
herent susceptibility to water treatment bactericides become dominant
in systems after bactericide treatment. We investigated the idea that
bacterial isolates adapt to grow in the presence of bactericides. Pure
cultures of Pseudomonas aeruginosa, P stutzeri and Bacillus cereus we
re cultured repeatedly in the presence of subinhibitory concentrations
of 2,2'-methylenebis(4-chlorophenol), Na dimethyldithiocarbamate, iso
thiazolone and alkyl dimethyl ammonium chloride. All isolates adapted
to grow in the presence of increasing concentrations of the bactericid
es. The phenomenon of development of bacterial resistance to water tre
atment bactericides was ascribed to adaptation and not to selection.