A5057245282- Listeria monocytogenes in Food Safety
- Food Safety and Hygiene
- Bacterial biofilms and quorum sensing
- Antimicrobial agents and applications
- Essential Oils and Antimicrobial Activity
- Salmonella and Campylobacter epidemiology
- Meat and Animal Product Quality
- Pharmaceutical and Antibiotic Environmental Impacts
- Water Treatment and Disinfection
- Microbial Inactivation Methods
- Vibrio bacteria research studies
- Identification and Quantification in Food
- Probiotics and Fermented Foods
- Food Supply Chain Traceability
- Advanced Chemical Sensor Technologies
- Food Waste Reduction and Sustainability
- Antimicrobial Resistance in Staphylococcus
- Fermentation and Sensory Analysis
- Risk Perception and Management
- Mycotoxins in Agriculture and Food
- Biopolymer Synthesis and Applications
- Infection Control and Ventilation
- Pesticide Residue Analysis and Safety
- Indoor Air Quality and Microbial Exposure
- Psychology of Moral and Emotional Judgment
Nofima
2016-2025
Fafo Foundation
2009-2024
Institute of Fisheries and Aquaculture
2021-2023
Norwegian Food Safety Authority
2018
Hôpital Saint-Michel
2013
Norwegian University of Life Sciences
2009-2010
University of Birmingham
2009
Paper and Fibre Research Institute
2007
SINTEF
2007
Norwegian University of Science and Technology
2007
Abstract Surface hygiene is commonly measured as a part of the quality system food processing plants, but bacteria present are not identified, their roles for and safety known. Here, we review identity residential characteristics relevant survival growth in industry along with potential implications quality. Sampling after cleaning disinfection increases likelihood targeting bacteria. The increasing use sequencing technologies to identify has improved knowledge about premises. Overall,...
The antibacterial effect of disinfectants is crucial for the control Listeria monocytogenes in food processing environments. Tolerance L. to sublethal levels based on quaternary ammonium compounds (QAC) conferred by resistance determinants qacH and bcrABC. presence distribution these genes have been anticipated a role survival growth environments where QAC are common use. In this study, panel 680 from nine Norwegian meat- salmon plants were grouped into 36 MLVA profiles. bcrABC was...
Listeria monocytogenes is ubiquitous in nature and a major concern for the food industry, since it causal agent of serious foodborne illness listeriosis. This organism can be introduced through many routes to food-processing environments may become established on equipment. Subsequently, products contaminated during processing. In addition, bacterium grow at refrigeration temperatures. Biofilms are regarded as important with respect survival growth microorganisms industry. Microorganisms...
Feed contaminated with Salmonella spp. constitutes a risk of infections in animals, and subsequently the consumers animal products. are occasionally isolated from feed factory environment some clones persist for several years. One hypothesis is that biofilm formation facilitates persistence by protecting bacteria against environmental stress, e.g. disinfection. The aim this study was to investigate forming potential strains feed- fishmeal factories. included 111 Norwegian fish meal factories...
We have prepared potentially permanent antimicrobial films based on surface-modified microfibrillated cellulose (MFC). MFC, obtained by disintegration of bleached softwood sulfite pulp in a homogenizer, was grafted with the quaternary ammonium compound octadecyldimethyl(3-trimethoxysilylpropyl)ammonium chloride (ODDMAC) simple adsorption-curing process. Films from ODDMAC-modified MFC were characterized Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron (XPS) tested for...
A general overview is presented of the changes in genetic expression along a time curve through first 20 min after acidification to pH 4.5 exponentially growing cultures food pathogenic strain Staphylococcus aureus 50583. newly developed method for statistical significance testing was used detect significant gene responses. Most responses showed an increase or decrease from zero 10 acidification, and then generally stabilization level min. Increased urease activity appeared be important...
Surfaces of food processing premises are exposed to regular cleaning and disinfection (C&D) regimes, using biocides that highly effective against bacteria growing as planktonic cells. However, in surface-associated communities (biofilms) typically more tolerant toward C&D than their individual free-cell counterparts, survival pathogens such
To evaluate disinfectants against Salmonella under conditions relevant for the feed industry.A survey on use of in industry showed that a range different types was used. Nine disinfectants, reflecting most commonly used active ingredients, were tested bactericidal activity isolated from industry. All efficient suspension. The effect varied considerably between compounds bacteria dried surfaces or grown as biofilm. Tenside-based and hypochlorite found to have low efficiency significantly...
The processing environment of salmon plants represents a potential major source bacteria causing spoilage fresh salmon. In this study, we have identified contamination routes important associated species within the genera Pseudomonas, Shewanella and Photobacterium in pre-rigor Bacterial counts culture-independent 16S rRNA gene analysis on fillet from seven showed higher levels Pseudomonas spp. industrially processed fillets compared to under strict hygienic conditions. Higher were found...
The microbiota surviving sanitation of salmon-processing conveyor belts was identified and its growth dynamics further investigated in a model mimicking processing surfaces such plants.A diverse dominated by Gram-negative bacteria isolated after regular three salmon plants. A cocktail 14 bacterial isolates representing all genera from (Listeria, Pseudomonas, Stenotrophomonas, Brochothrix, Serratia, Acinetobacter, Rhodococcus Chryseobacterium) formed stable biofilms on steel coupons (12°C,...
Listeria monocytogenes is an important foodborne pathogen responsible for the disease listeriosis, and can be found throughout environment, in many foods food processing facilities. The main cause of listeriosis consumption contaminated from sources environments. Persistence facilities has previously been shown L. sequence type (ST) 8 subtype. In current study, five ST8 strains were subjected to whole-genome sequencing compared with additionally available genomes, allowing comparison salmon,...
Contamination of food products with the foodborne pathogen Listeria monocytogenes may occur in processing environment. Many bacterial species co-exist this environment and can interact multispecies biofilms. Recent studies have shed light on composition microbial communities present same ecological habitat as L. monocytogenes. Others aimed at identifying competitive or cooperative interactions between other mixed-species Both be differently influenced even by different strains belonging to...
ABSTRACT Listeria monocytogenes presents a significant concern for the food industry due to its ability persist in processing environment. One of factors contributing persistence is decreased sensitivity disinfectants. Our objective was assess diversity L. disinfectants by testing response 1,671 L . isolates quaternary ammonium compounds (QACs) and 414 peracetic acid (PAA) using broth microdilution growth curve analysis assays, respectively, categorize into sensitive tolerant. A high...
ABSTRACT In clinical staphylococci, the presence of ica genes and biofilm formation are considered important for virulence. Biofilm may also be importance survival virulence in food-related staphylococci. present work, staphylococci from food industry were found to differ greatly their abilities form biofilms on polystyrene. A total 7 21 144 strains strong weak formers, respectively. Glucose sodium chloride stimulated formation. The biofilm-forming belonged nine different coagulase-negative...
Benzalkonium chloride (BC) is a commonly used disinfectant and preservative. This study describes changes in expression level at the transcriptomic proteomic for Escherichia coli K-12 gradually adapted to tolerance BC of 7-8 times initial MIC. Results from DNA arrays two-dimensional gel electrophoresis global gene protein studies were confirmed by real-time quantitative PCR. Peptide mass fingerprinting MALDI-TOF MS was identify differentially expressed proteins. Changes cells shown porins,...
ABSTRACT A meat factory commensal bacterium, Acinetobacter calcoaceticus , affected the spatial distribution of Escherichia coli O157:H7 surface colonization. The biovolume E. was 400-fold higher (1.2 × 10 6 μm 3 ) in a dynamic cocultured biofilm than monoculture (3.0 ), and colonized spaces between A. cell clusters.