Observation of antibacterial effects obtained at atmospheric and reduced pressures in afterglow conditions

¹ LAPLACE, CNRS, Université de Toulouse-UPS, INPT, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
² Laboratoire Parodontites et Maladies Générales, Faculté de Chirurgie Dentaire, 3 chemin des Maraîchers, 31062 Toulouse Cedex, France
³ INSERM U858, IFR-151, Avenue Jean Poulhés, 31432 Toulouse Cedex 4, France
⁴ LEGP, Université de Pau et des Pays de l'Adour, 2 avenue du Président Angot, 64000 Pau, France

Corresponding author: jean-philippe.sarrette@laplace.univ-tlse.fr

Received: 30 June 2009
Revised: 9 September 2009
Accepted: 14 September 2009
Published online: 26 November 2009

Abstract

Bactericidal activities of three different afterglows operating at reduced and atmospheric pressures and ambient temperature are established and compared through the use of a unique protocol for bacteria (E. coli, CIP 54.8 T) exposition, recovery and numeration. The influence of three important parameters is shown. An original scenario for bacterial inactivation at reduced pressure is proposed, compatible with previously published results and with the observation of conformational changes appearing on the treated bacteria.