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Volume 64, Issue 3


The impact of biofilm-forming potential and tafi production on transport of environmental Salmonella through unsaturated porous media

Anthony Salvucci / Wei Zhang / Veronica Morales / M. Cakmak / Anthony Hay / Tammo Steenhuis
Published Online: 2009-05-09 | DOI: https://doi.org/10.2478/s11756-009-0102-y


Understanding the factors influencing the transport of microbial pathogens, such as Salmonella and Escherichia coli, through porous media is critical to protecting drinking water supplies. The production of biofilms, along with individual biofilm-associated components, such as tafi, is believed to hinder transport of microorganisms through soil. This study investigated the relationship between biofilm formation and tafi production and the transport of environmental Salmonella through porous media. Thirty-two Salmonella isolates were initially assayed for their ability to form biofilms, from which a subset of these was selected to represent a range of high and low biofilm-formation potential and tafi formation capabilities. These were subsequently examined in unsaturated sand columns for transport characteristics. No obvious correlation was observed between Salmonella phenotypes and column retention. The results indicated that while transport of well-characterized laboratory E. coli strains can often be hindered by the presence of tafi and the potential to form biofilms, the presence of tafi did not retard the transport of the Salmonella strains.

Keywords: E. coli; bacterial transport; curli; cellulose; fimbriae

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About the article

Published Online: 2009-05-09

Published in Print: 2009-06-01

Citation Information: Biologia, Volume 64, Issue 3, Pages 460–464, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: https://doi.org/10.2478/s11756-009-0102-y.

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© 2009 Slovak Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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