Effect of several decontamination procedures on Listeria monocytogenes growing in biofilms

Listeria monocytogenes is a pathogenic bacterium which has been implicated in several foodborne illnesses. This microorganism grows into biofilms attached to the surfaces in food-processing plants, increasing its resistance to antimicrobial agents. The present work was realized to investigate the at...

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Veröffentlicht in:Journal of food protection 1998-06, Vol.61 (6), p.731-734
Hauptverfasser: Arizcun, C. (Universidad Publica de Navarra, Pamplona, Spain.), Vasseur, C, Labadie, J.C
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container_start_page 731
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creator Arizcun, C. (Universidad Publica de Navarra, Pamplona, Spain.)
Vasseur, C
Labadie, J.C
description Listeria monocytogenes is a pathogenic bacterium which has been implicated in several foodborne illnesses. This microorganism grows into biofilms attached to the surfaces in food-processing plants, increasing its resistance to antimicrobial agents. The present work was realized to investigate the attachment of L. monocytogenes isolates to glass surfaces and to find a decontamination procedure to remove these bacteria in biofilms. Three-day biofilms were prepared by growing L. monocytogenes isolates from food plant environments on glass surfaces. Sixteen decontamination treatments at different pHs, temperatures, and times of exposure were tested against L. monocytogenes biofilms. The most efficient treatments were those applied at 63 degrees C. Combinations of decontamination treatments applied at 55 degrees C for 30 min provided different results according to the other factors used. In general, L. monocytogenes biofilms were found to be not very susceptible to high osmolarity (10.5% NaCl), and the interaction of sodium chloride and acid did not seem to have important effects in inactivating these bacteria (from a 1.3- to a 1.9-log-CFU/cm2 reduction). The combination of NaOH (pH 10.5; 100 mM) and acetic acid (pH 5.4; 76.7 mM) applied sequentially at 55 degrees C for even 5 min was shown to be the most effective treatment to remove L. monocytogenes from biofilms (at least a 4.5- to 5.0-log-CFU/cm2 decline)
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(Universidad Publica de Navarra, Pamplona, Spain.)</creatorcontrib><creatorcontrib>Vasseur, C</creatorcontrib><creatorcontrib>Labadie, J.C</creatorcontrib><title>Effect of several decontamination procedures on Listeria monocytogenes growing in biofilms</title><title>Journal of food protection</title><addtitle>J Food Prot</addtitle><description>Listeria monocytogenes is a pathogenic bacterium which has been implicated in several foodborne illnesses. This microorganism grows into biofilms attached to the surfaces in food-processing plants, increasing its resistance to antimicrobial agents. The present work was realized to investigate the attachment of L. monocytogenes isolates to glass surfaces and to find a decontamination procedure to remove these bacteria in biofilms. Three-day biofilms were prepared by growing L. monocytogenes isolates from food plant environments on glass surfaces. 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The combination of NaOH (pH 10.5; 100 mM) and acetic acid (pH 5.4; 76.7 mM) applied sequentially at 55 degrees C for even 5 min was shown to be the most effective treatment to remove L. monocytogenes from biofilms (at least a 4.5- to 5.0-log-CFU/cm2 decline)</abstract><cop>Des Moines, IA</cop><pub>International Association of Milk, Food and Environmental Sanitarians</pub><pmid>9709259</pmid><doi>10.4315/0362-028X-61.6.731</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record>
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subjects Acetic Acid - pharmacology
ADHESION
ANTIINFECTIVE AGENTS
ANTIMICROBIALS
ANTIMICROBIANOS
ANTIMICROBIEN
Bacterial Adhesion - drug effects
Biological and medical sciences
Chemical and Process Engineering
DESINTOXICACION
DETOXIFICATION
Engineering Sciences
Food engineering
Food industries
Food Microbiology
Food Packaging - standards
Fundamental and applied biological sciences. Psychology
General aspects
GLASS
Hydrogen-Ion Concentration
Lactic Acid - pharmacology
Life Sciences
LISTERIA MONOCYTOGENES
Listeria monocytogenes - drug effects
Listeria monocytogenes - isolation & purification
MECHANICAL PROPERTIES
PROPIEDADES MECANICAS
PROPRIETE MECANIQUE
Sodium Chloride - pharmacology
Sodium Hydroxide - pharmacology
TEMPERATURA
TEMPERATURE
VERRE
VIDRIO
title Effect of several decontamination procedures on Listeria monocytogenes growing in biofilms
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