journal
MENU ▼
Read by QxMD icon Read
search

International Journal of Food Microbiology

journal
https://www.readbyqxmd.com/read/28710947/variations-in-biofilm-formation-desiccation-resistance-and-benzalkonium-chloride-susceptibility-among-listeria-monocytogenes-strains-isolated-in-canada
#1
Marta J Piercey, Timothy C Ells, Andrew J Macintosh, Lisbeth Truelstrup Hansen
Listeria monocytogenes is a pathogenic foodborne microorganism noted for its ability to survive in the environment and food processing facilities. Survival may be related to the phenotype of individual strains including the ability to form biofilms and resist desiccation and/or sanitizer exposure. The objectives of this research were to compare 14 L. monocytogenes strains isolated from blood (3), food (6) and water (5) with respect to their benzalkonium chloride (BAC) sensitivity, desiccation resistance, and ability to form biofilm...
July 8, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28711856/rnaseq-based-transcriptome-comparison-of-saccharomyces-cerevisiae-strains-isolated-from-diverse-fermentative-environments
#2
Clara Ibáñez, Roberto Pérez-Torrado, Miguel Morard, Christina Toft, Eladio Barrio, Amparo Querol
Transcriptome analyses play a central role in unraveling the complexity of gene expression regulation in Saccharomyces cerevisiae. This species, one of the most important microorganisms for humans given its industrial applications, shows an astonishing degree of genetic and phenotypic variability among different strains adapted to specific environments. In order to gain novel insights into the Saccharomyces cerevisiae biology of strains adapted to different fermentative environments, we analyzed the whole transcriptome of three strains isolated from wine, flor wine or mezcal fermentations...
July 6, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28697384/schizosaccharomyces-pombe-and-saccharomyces-cerevisiae-yeasts-in-sequential-fermentations-effect-on-phenolic-acids-of-fermented-kei-apple-dovyalis-caffra-l-juice
#3
P P Minnaar, N P Jolly, V Paulsen, H W Du Plessis, M Van Der Rijst
Kei-apple (Dovyalis caffra) is an evergreen tree indigenous to Southern Africa. The fruit contains high concentrations of l-malic acid, ascorbic acid, and phenolic acids. Kei-apple juice was sequentially inoculated with Schizosaccharomyces pombe and Saccharomyces cerevisiae yeasts. A reference fermentation using only S. cerevisiae was included. The fermentation was monitored by recording mass loss. At the end of fermentation, twelve untrained judges conducted free choice aroma profiling on the fruit wines. The Kei-apple juice and wines were analysed for total titratable acidity, total soluble solids, pH, alcohol, l-malic acid, and phenolic acids...
July 6, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28692890/porcine-blood-used-as-ingredient-in-meat-productions-may-serve-as-a-vehicle-for-hepatitis-e-virus-transmission
#4
Ingeborg L A Boxman, Claudia C C Jansen, Geke Hägele, Ans Zwartkruis-Nahuis, Jeroen Cremer, Harry Vennema, Aloys S L Tijsma
The aim of the present study was to investigate whether the use of porcine blood(products) in food could be a risk for a hepatitis E virus (HEV) infection. HEV RNA was detected in 33/36 batches of (non-heated) liquid products and in 7/24 spray dried powder products. Contamination levels varied among the products, but were highest in liquid whole blood, plasma and fibrinogen reaching levels of 2.2×10(2) to 2.8×10(2) HEV genome copies per 0.2g. Sequence analyses revealed genotype 3 strains, of which two were 100% (493nt) identical to recently diagnosed HEV cases, although no direct epidemiological link was established...
June 28, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28688370/whole-transcriptome-rnaseq-analysis-of-oenococcus-oeni-reveals-distinct-intra-specific-expression-patterns-during-malolactic-fermentation-including-genes-involved-in-diacetyl-metabolism
#5
Peter R Sternes, Peter J Costello, Paul J Chambers, Eveline J Bartowsky, Anthony R Borneman
We report the first whole transcriptome RNAseq analysis of the wine-associated lactic acid bacterium Oenococcus oeni using a combination of reference-based mapping and de novo transcript assembly in three distinct strains during malolactic fermentation in Cabernet Sauvignon wine. Two of the strains (AWRIB551 and AWRIB552) exhibited similar transcriptomes relative to the third strain (AWRIB419) which was dissimilar by comparison. Significant intra-specific variation for genes related to glycolysis/gluconeogenesis, purine metabolism, aminoacyl-tRNA biosynthesis, ABC transporters and phosphotransferase systems was observed...
June 28, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28672173/prevalence-of-verocytotoxigenic-escherichia-coli-strains-isolated-from-raw-beef-in-southern-italy
#6
Gaia Nobili, Ilenia Franconieri, Gianfranco La Bella, Maria Grazia Basanisi, Giovanna La Salandra
Verocytotoxin (VT)-producing Escherichia coli (VTEC) are a significant foodborne public health hazard, where most human infections are associated with six serogroups (O157, O26, O103, O145, O111 and O104). VTEC was the fourth most commonly reported zoonosis in the EU in 2015, with 5901 confirmed human cases. Ruminant animals, including cattle, are a major reservoir of VTEC. The consumption of VTEC-contaminated animal-derived foodstuffs, especially undercooked ground beef, is an important transmission route...
June 28, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28697385/quantitative-contamination-assessment-of-escherichia-coli-in-baby-spinach-primary-production-in-spain-effects-of-weather-conditions-and-agricultural-practices
#7
Ana Allende, Irene Castro-Ibáñez, Roland Lindqvist, María Isabel Gil, Mieke Uyttendaele, Liesbeth Jacxsens
A quantitative microbial contamination model of Escherichia coli during primary production of baby spinach was developed. The model included only systematic contamination routes (e.g. soil and irrigation water) and it was used to evaluate the potential impact of weather conditions, agricultural practices as well as bacterial fitness in soil on the E. coli levels present in the crop at harvest. The model can be used to estimate E. coli contamination of baby spinach via irrigation water, via soil splashing due to irrigation water or rain events, and also including the inactivation of E...
June 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28672174/characterization-of-small-spored-alternaria-from-argentinean-crops-through-a-polyphasic-approach
#8
Lucía da Cruz Cabral, Marcela Rodriguero, Sebastián Stenglein, Kristian Fog Nielsen, Andrea Patriarca
Small-spored Alternaria have been isolated from a wide variety of food crops, causing both economic losses and human health risk due to the metabolites produced. Their taxonomy has been discussed widely, but no scientific consensus has been established in this field to date. Argentina is a major exporter of agricultural products, so it is essential to thoroughly understand the physiological behaviour of this pathogen in a food safety context. Thus, the objective of this work was to characterize small-spored Alternaria spp...
June 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28668728/influence-of-torulaspora-delbrueckii-in-varietal-thiol-3-sh-and-4-msp-release-in-wine-sequential-fermentations
#9
Ignacio Belda, Javier Ruiz, Beata Beisert, Eva Navascués, Domingo Marquina, Fernando Calderón, Doris Rauhut, Santiago Benito, Antonio Santos
In last years, non-Saccharomyces yeasts have emerged as innovative tools to improve wine quality, being able to modify the concentration of sensory-impact compounds. Among them, varietal thiols released by yeasts, play a key role in the distinctive aroma of certain white wines. In this context, Torulaspora delbrueckii is in the spotlight because of its positive contribution to several wine quality parameters. This work studies the physiological properties of an industrial T. delbrueckii strain, for the production of wines with increased thiol concentrations...
June 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28668727/inactivation-of-viruses-and-bacteria-on-strawberries-using-a-levulinic-acid-plus-sodium-dodecyl-sulfate-based-sanitizer-taking-sensorial-and-chemical-food-safety-aspects-into-account
#10
Zijin Zhou, Sophie Zuber, Frédérique Cantergiani, Sophie Butot, Dan Li, Thomas Stroheker, Frank Devlieghere, Anthony Lima, Umberto Piantini, Mieke Uyttendaele
The efficacy of levulinic acid (LVA) in combination with sodium dodecyl sulfate (SDS) in removal of foodborne viruses, enteric bacterial pathogens and their surrogates on fresh strawberries was investigated. Inoculated strawberries were treated with potable water, sodium hypochlorite solution (50ppm), 0.5% LVA plus 0.5% SDS solution, and 5% LVA plus 2% SDS solution respectively for 2min, followed by spray-rinsing with potable water. Water washing removed at least 1.0-log of the tested viral and bacterial strains from the strawberries' surfaces...
June 23, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28668729/characterization-of-antibiotic-resistant-and-pathogenic-escherichia-coli-in-irrigation-water-and-vegetables-in-household-farms
#11
Susana Araújo, Isabel A T Silva, Marta Tacão, Carla Patinha, Artur Alves, Isabel Henriques
This study aimed to characterize Escherichia coli present in irrigation water and vegetables from 16 household farms. Isolates were obtained from 50% of water (n=210 isolates) and 38% of vegetable samples (n=239). Phylogroups B1 (56% of isolates) and A (22%) were the most prevalent both in water and vegetables. Diarrheagenic strains were detected in vegetables. Irrespective of the source (i.e. water or vegetables), the most common antibiotic resistance was against streptomycin (89% resistant isolates) and tetracycline (24%)...
June 22, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28646670/a-metagenomic-assessment-of-viral-contamination-on-fresh-parsley-plants-irrigated-with-fecally-tainted-river-water
#12
X Fernandez-Cassi, N Timoneda, E Gonzales-Gustavson, J F Abril, S Bofill-Mas, R Girones
Microbial food-borne diseases are still frequently reported despite the implementation of microbial quality legislation to improve food safety. Among all the microbial agents, viruses are the most important causative agents of food-borne outbreaks. The development and application of a new generation of sequencing techniques to test for viral contaminants in fresh produce is an unexplored field that allows for the study of the viral populations that might be transmitted by the fecal-oral route through the consumption of contaminated food...
June 21, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28704728/development-of-a-novel-multiplexed-qpcr-and-pyrosequencing-method-for-the-detection-of-human-pathogenic-yersiniae
#13
M C Thomas, T W Janzen, G Huscyzynsky, A Mathews, K K Amoako
The purpose of this study was to develop a novel and robust molecular assay for the detection of human pathogenic yersiniae (i.e. Yersinia enterocolitica, Y. pseudotuberculosis and Y. pestis) in complex food samples. The assay combines multiplexed real-time PCR (qPCR) and Pyrosequencing for detecting and differentiating human pathogenic yersiniae with high confidence through sequence based confirmation. The assay demonstrated 100% specificity and inclusivity when tested against a panel of 14 Y. enterocolitica, 22 Y...
June 20, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28666130/tracking-of-listeria-monocytogenes-in-meat-establishment-using-whole-genome-sequencing-as-a-food-safety-management-tool-a-proof-of-concept
#14
Ivan Nastasijevic, Dubravka Milanov, Branko Velebit, Vesna Djordjevic, Craig Swift, Anais Painset, Brankica Lakicevic
Repeated Listeria outbreaks particularly associated with Ready-To-Eat (RTE) delicatessen meat products have been reported annually at global level. The most frequent scenario that led to foodborne outbreaks was the post-thermal treatment cross-contamination of deli meat products during slicing and modified atmosphere packaging (MAP). The precondition for such cross contamination is the previous introduction of Listeria into meat processing facilities and subsequent colonization of the production environment, associated with formation of biofilms resilient to common sanitation procedures regularly applied in meat establishments...
June 20, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28644990/global-transcriptional-response-of-escherichia-coli-mg1655-cells-exposed-to-the-oxygenated-monoterpenes-citral-and-carvacrol
#15
Beatriz Chueca, Elisa Pérez-Sáez, Rafael Pagán, Diego García-Gonzalo
DNA microarrays were used to study the mechanism of bacterial inactivation by carvacrol and citral. After 10-min treatments of Escherichia coli MG1655 cells with 100 and 50ppm of carvacrol and citral, 76 and 156 genes demonstrated significant transcriptional differences (p≤0.05), respectively. Among the up-regulated genes after carvacrol treatment, we found gene coding for multidrug efflux pumps (acrA, mdtM), genes related to phage shock response (pspA, pspB, pspC, pspD, pspF and pspG), biosynthesis of arginine (argC, argG, artJ), and purine nucleotides (purC, purM)...
June 20, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28667935/internalization-of-listeria-monocytogenes-in-cantaloupes-during-dump-tank-washing-and-hydrocooling
#16
Dumitru Macarisin, Anna Wooten, Antonio De Jesus, Minji Hur, Seonjae Bae, Jitendra Patel, Peter Evans, Eric Brown, Thomas Hammack, Yi Chen
Recent listeriosis outbreaks and recalls associated with cantaloupes urge for studies to understand the mechanisms of cantaloupe contamination by Listeria monocytogenes. Postharvest practices such as washing and hydrocooling were suggested to facilitate the contamination of fresh fruits by human pathogens. This study assessed the potential of L. monocytogenes internalization into cantaloupes during dump tank washing and immersion-type hydrocooling in water contaminated with L. monocytogenes. The effect of cantaloupe cultivar, water temperature, and harvesting technique on L...
June 19, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28651076/application-of-water-assisted-ultraviolet-light-in-combination-of-chlorine-and-hydrogen-peroxide-to-inactivate-salmonella-on-fresh-produce
#17
Shuanghuan Guo, Runze Huang, Haiqiang Chen
With the demand for fresh produce increases in recent decades, concerns for microbiological safety of fresh produce are also raised. To identify effective ultraviolet (UV) light treatment for fresh produce decontamination, we first determined the effect of three forms of UV treatment, dry UV (samples were treated by UV directly), wet UV (samples were dipped in water briefly and then exposed to UV), and water-assisted UV (samples were treated by UV while being immersed in agitated water) on inactivation of Salmonella inoculated on tomatoes and fresh-cut lettuce...
June 19, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28666129/microbial-community-profiling-of-fresh-basil-and-pitfalls-in-taxonomic-assignment-of-enterobacterial-pathogenic-species-based-upon-16s-rrna-amplicon-sequencing
#18
Siele Ceuppens, Dieter De Coninck, Nadine Bottledoorn, Filip Van Nieuwerburgh, Mieke Uyttendaele
Application of 16S rRNA (gene) amplicon sequencing on food samples is increasingly applied for assessing microbial diversity but may as unintended advantage also enable simultaneous detection of any human pathogens without a priori definition. In the present study high-throughput next-generation sequencing (NGS) of the V1-V2-V3 regions of the 16S rRNA gene was applied to identify the bacteria present on fresh basil leaves. However, results were strongly impacted by variations in the bioinformatics analysis pipelines (MEGAN, SILVAngs, QIIME and MG-RAST), including the database choice (Greengenes, RDP and M5RNA) and the annotation algorithm (best hit, representative hit and lowest common ancestor)...
June 17, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28651079/a-survey-of-oenophages-during-wine-making-reveals-a-novel-group-with-unusual-genomic-characteristics
#19
Cécile Philippe, Fety Jaomanjaka, Olivier Claisse, Rémi Laforgue, Julie Maupeu, Melina Petrel, Claire Le Marrec
Oenophages have so far been mostly isolated from red wines under malolactic fermentation (MLF), and correspond to temperate or ex-temperate phages of Oenococcus oeni. Their genomes are clustered into 4 integrase gene sequence groups, which are also related to the chromosomal integration site. Our aims were to survey the occurrence of oenophages in a broader and more diverse collection of samples than those previously explored. Active phages were isolated from 33 out of 166 samples, which mostly originated from must and MLF...
June 17, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28646668/%C3%AE-galactosidase-from-aspergillus-lacticoffeatus-a-promising-biocatalyst-for-the-synthesis-of-novel-prebiotics
#20
Beatriz B Cardoso, Sara C Silvério, Luís Abrunhosa, José A Teixeira, Lígia R Rodrigues
β-galactosidase (EC 3.2.1.23) are interesting enzymes able to catalyze lactose hydrolysis and transfer reactions to produce lactose-based prebiotics with potential application in the pharmaceutical and food industry. In this work, Aspergillus lacticoffeatus is described, for the first time, as an effective β-galactosidase producer. The extracellular enzyme production was evaluated in synthetic and alternative media containing cheese whey and corn steep liquor. Although β-galactosidase production occurred in all media (expect for the one composed solely by cheese whey), the highest enzymatic activity values (460U/mL) were obtained for the synthetic medium...
June 16, 2017: International Journal of Food Microbiology
journal
journal
28915
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"