Accepted Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as an 'Accepted Article', doi: 10.1111/jam.12522 This article is protected by copyright. All rights reserved. Received Date : 08-Jan-2014 Revised Date : 08-Apr-2014 Accepted Date : 08-Apr-2014 Article type : Original Article Simultaneous enrichment and optical detection of low levels of stressed E. coli O157:H7 in food matrices. Abbreviated running headline: Stressed E.coli O157:H7 detection. L. Mondani (1) , Y. Roupioz (1) , S. Delannoy (2) , P. Fach (2) , T. Livache (1) (1) SPrAM, UMR 5819 CEA / CNRS / UJF-Grenoble 1, Institute for Nanosciences & Cryogeny, CEA- Grenoble F-38054 Grenoble, France (2) French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Food Safety Laboratory, 23 Av du Général De Gaulle, Fr-94706 Maisons-Alfort, France Correspondence Yoann Roupioz and Thierry Livache SPrAM, UMR 5819 CEA / CNRS / UJF-Grenoble 1,