This preliminary study focused on the effect of exposure to 0.5 T static magnetic fields on Escherichia coli adhesion and orientation. We investigated the difference in bacterial adhesion on the surface of glass and indium tin oxide-coated glass when exposed to a magnetic field either perpendicular or parallel to the adhesion surface (vectors of magnetic induction are perpendicular or parallel to the adhesion surface, respectively). Control cultures were simultaneously grown under identical conditions but without exposure to the magnetic field. We observed a decrease in cell adhesion after exposure to the magnetic field. Orientation of bacteria cells was affected after exposure to a parallel magnetic field. On the other hand, no effect on the orientation of bacteria cells was observed after exposure to a perpendicular magnetic field.

b Ecole polytechnique de Montréal Montréal QC Canada

c INAT Tunis Tunisie

e Laboratoire Ampère Université Lyon 1 69622 Villeurbanne CEDEX Lyon France

f Institute of Photonics and Electronics Academy of Sciences of Czech Republic Chaberska 57 18251 Prague 8 Czech Republic

g Laboratoire des Polymères Biopolymères et Membranes UMR CNRS 6522 Rouen France

Institut de Biotechnologie de Monastir B P 74 Avenue Tahar Haddad 5000 Monastir Tunisie

Unité de Microbiologie et Génétique UMR CNRS 5122 Villeurbanne France

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