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Role of the cell-wall structure in the retention of bacteria by microfiltration membranes

Lebleu, Nathalie and Roques, Christine and Aimar, Pierre and Causserand, Christel Role of the cell-wall structure in the retention of bacteria by microfiltration membranes. (2009) Journal of Membrane Science, 326 (1). 178-185. ISSN 0376-7388

(Document in English)

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Official URL: http://dx.doi.org/10.1016/J.MEMSCI.2008.09.049


This experimental study investigates the retention of bacteria by porous membranes. The transfer of bacteria larger than the nominal pore size of microfiltration track-etched membranes has been studied for several kinds of bacterial strains. This unexpected transfer does not correlate to the hydrophobicity,neither to the surface charge of the microorganism, as suggested in previous reports. We conclude that,in our conditions, the kind of bacteria (Gram-positive or Gram-negative) is finally the most important parameter. As the distinction between those two types of bacteria is related to the cell-wall structure, we provide an experimental evidence, via the action of an antibiotic, that the cell-wall flexibility triggers the transfer of the bacteria through artificial membranes, when the pores are smaller in size than the cell.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at : http://www.sciencedirect.com/science/article/pii/S0376738808008806
HAL Id:hal-03563398
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:11 Jun 2012 13:03

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