Impact of cleaning and disinfection agents on biofilm structure and on microbial transfer to a solid model food

Journal of Applied Microbiology
Graziella Midelet, B Carpentier

Abstract

To determine how single cells and microcolonies transfer to food from open surfaces in the meat industry. Biofilms of four bacterial strains isolated from food processing surfaces were established on stainless steel substrates conditioned with meat exudate in the presence or absence of CaCl(2). Image analysis of the biofilms showed that the addition of calcium resulted in an increase of the number and size of microcolonies with two strains: Staphylococcus sciuri and Pseudomonas fluorescens. Image analysis of the biofilms of those two strains grown in the presence of calcium was performed before and after contacts with tryptone soya agar as a solid model food. For the biofilms treated or not with a chlorinated alkaline agent, where a decrease in surface coverage occurred, it was accompanied by a decrease in the percentage of the coverage accounted for by microcolonies (P(m)). Attachment strength was greater for P. fluorescens than for S. sciuri. When the P. fluorescens biofilms were treated with a solution containing glutaraldehyde, the contacts did not modify their structure. By contrast, their treatment with chlorinated alkaline resulted, after contacts, in the smallest coverage and P(m). With S. sciuri, a decrease in coverage...Continue Reading

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Citations

Aug 21, 2008·Journal of Materials Science. Materials in Medicine·Polina Prokopovich, Stefano Perni
May 12, 2010·Antimicrobial Agents and Chemotherapy·William M DavisonPhilip S Stewart
Jun 19, 2012·International Journal of Food Microbiology·Karin HoelzerSherri Dennis
Dec 29, 2013·Microbial Ecology·Lizziane Kretli WinkelströterElaine Cristina Pereira De Martinis
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Jul 9, 2009·Journal of Applied Microbiology·W De MuynckW Verstraete
Apr 22, 2008·FEMS Microbiology Letters·Sofia AnderssonGunnel Dalhammar
Oct 22, 2016·International Journal of Food Microbiology·Anaïs OverneyOlivier Firmesse
May 4, 2017·International Journal of Food Microbiology·Jiaqi LiXiaonan Lu
Sep 30, 2016·Microorganisms·Angelo ColagiorgiAdriana Ianieri
Nov 28, 2018·Journal of Food Protection·Cristina Rodríguez-MelcónCarlos Alonso-Calleja
Jul 13, 2019·Frontiers in Microbiology·Alon FriedlanderMoshe Shemesh

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