Abstract
The occurrence of cop-like copper resistance determinants homologous to the cop genes of Pseudomonas syringae among bacteria isolated from a water distribution system experiencing copper corrosion was investigated in this study. It was found that at least 49% of the copper-resistant bacteria and less than 15% of the copper-sensitive isolates possessed a cop homolog. The occurrence of this determinant in the copper-resistant population correlated with the degree of copper tolerance exhibited by the bacteria. The effect of organic substances present in the culture media on the empirical degree of bacterial copper tolerance is also discussed.Key words: copper resistance genes, water distribution system, cop.
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