World Journal of Microbiology and Biotechnology

, Volume 29, Issue 7, pp 1197–1206

Chemical modification of polyvinyl chloride and silicone elastomer in inhibiting adhesion of Aeromonas hydrophila

Authors

    • Institute of Fermentation Technology and MicrobiologyTechnical University of Lodz
  • Joanna Berlowska
    • Institute of Fermentation Technology and MicrobiologyTechnical University of Lodz
  • Urszula Mizerska
    • Center of Molecular and Macromolecular StudiesPolish Academy of Sciences
  • Witold Fortuniak
    • Center of Molecular and Macromolecular StudiesPolish Academy of Sciences
  • Julian Chojnowski
    • Center of Molecular and Macromolecular StudiesPolish Academy of Sciences
  • Wojciech Ambroziak
    • Institute of Fermentation Technology and MicrobiologyTechnical University of Lodz
Original Paper

DOI: 10.1007/s11274-013-1282-8

Cite this article as:
Kregiel, D., Berlowska, J., Mizerska, U. et al. World J Microbiol Biotechnol (2013) 29: 1197. doi:10.1007/s11274-013-1282-8

Abstract

Disease-causing bacteria of the genus Aeromonas are able to adhere to pipe materials, colonizing the surfaces and forming biofilms in water distribution systems. The aim of our research was to study how the modification of materials used commonly in the water industry can reduce bacterial cell attachment. Polyvinyl chloride and silicone elastomer surfaces were activated and modified with reactive organo-silanes by coupling or co-crosslinking silanes with the native material. Both the native and modified surfaces were tested using the bacterial strain Aeromonas hydrophila, which was isolated from the Polish water distribution system. The surface tension of both the native and modified surfaces was measured. To determine cell viability and bacterial adhesion two methods were used, namely plate count and luminometry. Results were expressed in colony-forming units (c.f.u.) and in relative light units (RLU) per cm2. Almost all the chemically modified surfaces exhibited higher anti-adhesive and anti-microbial properties in comparison to the native surfaces. Among the modifying agents examined, poly[dimethylsiloxane-co-(N,N-dimethyl-N-n-octylammoniopropyl chloride) methylsiloxane)] terminated with hydroxydimethylsilyl groups (20 %) in silicone elastomer gave the most desirable results. The surface tension of this modifier, was comparable to the non-polar native surface. However, almost half of this value was due to the result of polar forces. In this case, in an adhesion analysis, only 1 RLU cm−2 and less than 1 c.f.u. cm−2 were noted. For the native gumosil, the results were 9,375 RLU cm−2 and 2.5 × 108 c.f.u. cm−2, respectively. The antibacterial activity of active organo-silanes was associated only with the carrier surface because no antibacterial compounds were detected in liquid culture media, in concentrations that were able to inhibit cell growth.

Keywords

Aeromonas hydrophila Biofilm Polyvinyl chloride Silicone elastomer Organo-silanes

Copyright information

© The Author(s) 2013

Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.