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Abstract
Sodium dichloroisocyanurate (NaDCC) is a chemical agent that acts against microorganisms in a manner similar to that of sodium hypochlorite by releasing free available chlorine. NaDCC has been approved by the WHO for the emergency treatment of water and by the US EPA for routine treatment of water. Previous studies assessing the effectiveness of NaDCC for the treatment of water implied that NaDCC should have a wide array of disinfecting effects beyond the treatment of planktonic cells in potable water. In this study the biocidal effects of NaDCC against Pseudomonas aeruginosa cells in different growth modes including planktonic cells and biofilms were explored. The data showed that a 60% dilution of the standard NaDCC solution was effective in the treatment of both P. aeruginosa planktonic cells and biofilms.
Acknowledgements
The work was funded by an NSERC Discovery Grant (RGPIN 3556 06-08) awarded to MH and a Ryerson Research Assistant award to AM. Special thanks are extended to Duy Nguyen for his help with the flow cell experiments. The authors also thank Neda Habibnia and Nikoo Habibnia, supported by the OVPRI Undergraduate Research Opportunities (URO) Scholars Program, and Laura Berthiaume and Patrick Ronan (supported by NSERC) for performing the planktonic cell inhibition assays and free chlorine measurements.