Escherichia coli O157:H7

Thu, 07/21/2016 - 07:11
Summary Starter cultures of low-salt Chinese paocai were screened from 135 lactic acid bacteria (LAB) by evaluating their antimicrobial activity and growth characteristics. Furthermore, the survival of Escherichia coli O157:H7, nitrite contents and sensory acceptability of the starter-fermented paocai were evaluated. LAB BC92, which was identified as Lactobacillus pentosus, was used as a starter...
Mon, 07/18/2016 - 15:54
Publication date: January 2017 , Volume 71 Author(s): Andrea Cossu, Phuong Le, Glenn M. Young, Nitin Nitin To reduce cross contamination with foodborne pathogens during washing procedures, sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2) are widely used in the fresh produce industry. To ensure food safety and minimize excessive use of sanitizers and water during sanitation, it...
Tue, 07/12/2016 - 03:20
Louise Crozier, Pete E. Hedley, Jenny Morris, Carol Wagstaff, Simon C. Andrews, Ian Toth, Robert W. Jackson, Nicola J. Holden
Fri, 07/01/2016 - 03:20
Brigida Rusconi, Fatemeh Sanjar, Sara S. K. Koenig, Mark K. Mammel, Phillip I. Tarr, Mark Eppinger
Thu, 06/30/2016 - 11:01
Extracellular proteins play important roles in bacterial interactions with the environmental matrices. In this study, we examined the extracellular proteins from Escherichia coli O157:H7 and O104:H4 by tandem mass spectrometry. We identified 500 and 859 proteins from the growth media of E. coli O157:H7 and O104:H4, respectively, including 371 proteins common to both strains. Among proteins that...
Tue, 06/28/2016 - 19:25
The essential oil (EO) of Zataria multiflora Bioss. was successfully encapsulated into nanoliposomes in this study. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of EO loaded nanoliposomes and free EO were studied at 25 and 35C against Escherichia coli O157:H7. Effect of sub-inhibitory concentrations (subMIC) of EO was also evaluated before and after...
Thu, 06/16/2016 - 14:12
Publication date: September 2016 , Volume 58 Author(s): Abhinav Upadhyay, Chi-hung Chen, Hsinbai Yin, Indu Upadhyaya, Samantha Fancher, Yanyan Liu, Meera Surendran Nair, Leanne Jankelunas, Jitendra R. Patel, Kumar Venkitanarayanan The efficacy of a new generation disinfectant, octenidine dihydrochloride (OH), as wash and coating treatments for reducing Listeria...
Thu, 06/16/2016 - 14:12
Publication date: September 2016 , Volume 58 Author(s): Vasiliki D. Vardaka, Hany M. Yehia, Ioannis N. Savvaidis In this study, we examined the antimicrobial effects of citrus extract (Citrox®) and chitosan on lactic acid bacteria (LAB) and the pathogens Escherichia coli O157:H7 and Salmonella enterica on turkey meat during storage under vacuum packaging (VP) at 4 and 10 °C. We also...
Thu, 06/16/2016 - 14:12
Publication date: October 2016 , Volume 59 Author(s): Suzannah Murphy, Michael T. Gaffney, Seamus Fanning, Catherine M. Burgess The diversion of food wastes from landfill to sustainable disposal methods, such as composting and anaerobic digestion, has led to an increase in the soil amendment products that are now commercially available and which are derived from both of these...
Thu, 06/16/2016 - 13:59
Publication date: 16 August 2016 , Volume 231 Author(s): Baskar Balakrishnan, Syed Barizuddin, Tumen Wuliji, Majed El-Dweik Developing rapid and sensitive methods for the detection of pathogenic Escherichia coli O157:H7 remains a major challenge in food safety. The present study attempts to develop an immunofluorescence technique that uses Protein-A-coated, magnetic beads as the...
Wed, 06/15/2016 - 15:30
Abstract Spray washing is a common sanitizing method for the fresh produce industry. The purpose of this research was to investigate the antimicrobial effect of spraying slightly acidic electrolyzed water (SAEW) and a combination of ozonated water with ultraviolet (UV) in reducing Escherichia coli O157:H7 on romaine and iceberg lettuces. Both romaine and iceberg lettuces were spot inoculated with...
Tue, 06/07/2016 - 05:53
Antibacterial activity, also antioxidant capacity of Carum copticum was evaluated; in addition, a mechanism for its antibacterial action against both Gram positive and Gram negative bacteria were introduced. Presence of antimicrobial constituents (thymol, p-cymene, γ-terpinene) were confirmed by gas chromatography/mass spectrometry. Micro-well dilution and disk diffusion assays were applied to...
Wed, 05/25/2016 - 05:18
Publication date: Available online 19 May 2016 Author(s): J. Rybarczyk, E. Kieckens, D. Vanrompay, E. Cox Escherichia coli O157:H7 shed by clinically healthy ruminants has been linked to hemorrhagic colitis and the hemolytic uremic syndrome in humans. The bacteria are spread mainly by contaminated food and water, contact with animals carrying the organisms, and person-to-person...
Thu, 05/12/2016 - 23:27
Publication date: November 2016 , Volume 69 Author(s): Tareq M. Osaili, Anas Al-Nabulsi Tahini, sesame seeds paste, is of great concern to both regulatory agencies and food processors as it may be exposed to microbial contamination through processing. This study aimed to evaluate the effect of gamma irradiation on inactivation of stressed Escherichia coli O157:H7 and microbiota in tahini...
Mon, 05/02/2016 - 11:00
We previously showed that modeled microgravity conditions alter the physiological characteristics of Escherichia coli O157:H7. To examine how microgravity conditions affect bacterial heat stress responses, D values, membrane fatty acid composition, and heat stress-related gene expression (clpB, dnaK, grpE, groES, htpG, htpX, ibpB, and rpoH), E. coli O157:H7 ATCC 35150, ATCC 43889, ATCC 43890, and...
Fri, 04/29/2016 - 07:04
Abstract Concerns for occurrence of food-borne disease and harmful impacts of chemical preservatives encourage the use of natural preservatives such as essential oils (EOs). However, EOs are unstable in the presence of oxygen, light and temperature. Attempts have been made to overcome this unstability by entrapment methods. The purpose of this study was to produce liposomal Zataria multiflora...
Fri, 04/08/2016 - 20:48
Publication date: August 2016 , Volume 57 Author(s): Michelle Qiu Carter, Jacqueline W. Louie, Doris Feng, Wayne Zhong, Maria T. Brandl Several species of enteric pathogens produce curli fimbriae, which may affect their interaction with surfaces and other microbes in nonhost environments. Here we used two Escherichia coli O157:H7 outbreak strains with distinct genotypes to...
Fri, 04/08/2016 - 20:48
Publication date: September 2016 , Volume 58 Author(s): Yijing Zhou, Mukund V. Karwe, Karl R. Matthews High pressure processing (HPP) is a safe non-thermal processing method to effectively improve food safety. In this study, HPP treatment followed by cold storage was investigated to reduce Escherichia coli O157:H7 in ground beef. Experiments were conducted using ground beef contaminated...
Fri, 04/08/2016 - 20:48
Publication date: June 2016 , Volume 56 Author(s): M.K. Song, H.W. Kim, M.S. Rhee We previously reported that a combination of heat and relative humidity (RH) had a marked bactericidal effect on Escherichia coli O157:H7 on radish seeds. Here, response surface methodology with a Box-Behnken design was used to build a model to predict reductions in E. coli O157:H7 populations based on...
Tue, 03/29/2016 - 18:39
Publication date: Available online 29 March 2016 Author(s): Nam Hee Kim, Min Suk Rhee The food industry must prevent the build-up of strong Escherichia coli O157:H7 biofilms in food processing environments. The present study examined the bactericidal action of phytic acid (PA), a natural extract from rice bran and the hulls/peels of legumes, against E. coli O157:H7 biofilms. The...
Fri, 03/25/2016 - 00:00
Shiga toxin-producing Escherichia coli O157:H7 (STEC) cause food-borne illness that may be fatal. STEC strains enumerate two types of potent Shiga toxins (Stx1 and Stx2) that are responsible for causing diseases. It is important to detect the E. coli O157 and Shiga toxins in food to prevent outbreak of diseases. We describe the development of two multi-analyte antibody-based lateral flow...
Thu, 03/24/2016 - 05:11
Publication date: Available online 24 March 2016 Author(s): E. Kieckens, J. Rybarczyk, S.A. Barth, C. Menge, E. Cox, D. Vanrompay Prevention of enterohemorrhagic Escherichia coli (EHEC) O157:H7 infections and of their severe clinical sequelae in humans remain to be a current challenge. Administration of bovine lactoferrin (bLF) proved to be effective in clearing EHEC from the...
Mon, 03/21/2016 - 02:26
Abstract In the present study Bunium persicum essential oil (BEO) was examined for its phytochemical properties, In vitro antioxidant activities, antibacterial properties against Salmonella Typhimurium, Escherichia coli O157:H7, Staphylococcus aureus and Listeria monocytogenes and antibacterial effects of the oil on survival of L. monocytogenes and E. coli O157:H7 in Iranian white cheese. Results...
Mon, 03/07/2016 - 10:15
Abstract AimsThe objective of this work was to study the growth potential of E. coli O157:H7 and Salmonella spp. in leafy vegetable extracts at different temperature conditions. Methods and ResultsCocktails of five strains of E. coli O157: H7 and of S. enterica were used. Inoculated aqueous vegetable extracts were incubated at 8, 10, 16 and 20°C during 21 days. Microbial growth was monitored...
Sat, 03/05/2016 - 10:53
LWT
Publication date: July 2016 Source:LWT - Food Science and Technology, Volume 70 Author(s): Lin Bi, Lei Yang, Arun K. Bhunia, Yuan Yao ɛ-Poly-l-lysine (EPL) is a food-grade cationic antimicrobial compound with a wide antimicrobial spectrum against bacteria, yeasts, and molds. However, EPL can be subject to rapid depletion after initial application and lose activity quickly. To address...
Thu, 03/03/2016 - 10:49
LWT
Publication date: July 2016 Source:LWT - Food Science and Technology, Volume 70 Author(s): Camila Sampaio Cutrim, Raphael Ferreira de Barros, Marion Pereira da Costa, Robson Maia Franco, Carlos Adam Conte-Junior, Marco Antonio Sloboda Cortez Yogurt has been considered safe due to its low pH, although recent researchers have demonstrated the survival of Escherichia coli O157:H7 in...
Sun, 02/21/2016 - 22:03
Publication date: Available online 22 February 2016 Author(s): L. Pianciola, B.A. D’Astek, M. Mazzeo, I. Chinen, M. Masana, M. Rivas Shiga toxin-producing Escherichia coli (STEC) are important food-borne pathogens associated with human diseases. In Argentina, O157:H7 is the dominant serotype in hemolytic uremic syndrome (HUS) cases. Previously, we have described the almost...
Sat, 02/13/2016 - 12:22
Publication date: March 2016 , Volume 99, Issue 3 Author(s): Anas A. Al-Nabulsi, Amin N. Olaimat, Tareq M. Osaili, Mutamed M. Ayyash, Aisha Abushelaibi, Ziad W. Jaradat, Reyad Shaker, Mahmoud Al-Taani, Richard A. Holley In addition to its nutritional and therapeutic properties, camel milk has the ability to suppress the growth of a wide range of foodborne pathogens, but...
Fri, 02/05/2016 - 11:01
The synergistic antimicrobial effects of phytic acid (PA), a natural extract from rice bran, plus sodium chloride against Escherichia coli O157:H7 were examined. Exposure to NaCl alone at concentrations up to 36% (wt/wt) for 5 min did not reduce bacterial populations. The bactericidal effects of PA alone were much greater than those of other organic acids (acetic, citric, lactic, and malic acids...
Tue, 02/02/2016 - 11:41
Publication date: August 2016 , Volume 66 Author(s): Haiying Cui, Cuixia Ma, Lin Lin This study aims to evaluate the antimicrobial effects of cold nitrogen plasma (CNP) and clove oil against Escherichia coli O157:H7 (E. coli O157:H7) biofilm on lettuce. Both clove oil (1 mg/mL, 2 mg/mL and 4 mg/mL) and CNP (400–600 W) displayed significant eradication effect on E. coli O157:H7 biofilms...
Fri, 01/29/2016 - 17:00
Carrie E. Schmidt, Smriti Shringi, Thomas E. Besser Escherichia coli O157:H7 is a food-borne bacterium that causes hemorrhagic diarrhea and hemolytic uremic syndrome in humans. While cattle are a known source of E. coli O157:H7 exposure resulting in human infection, environmental reservoirs may also be important sources of infection for both cattle and humans. Bacteriophage-encoded Shiga toxins...
Fri, 01/22/2016 - 11:01
The increased summertime prevalence of cattle carriage of enterohemorrhagic Shiga toxin-producing Escherichia coli O157:H7 (STEC O157) is associated with the increased summertime incidence of human infection. The mechanism driving the seasonality of STEC O157 carriage among cattle is unknown. We conducted experimental challenge trials to distinguish whether factors extrinsic or intrinsic to...
Tue, 01/19/2016 - 09:12
Publication date: 2 March 2016 , Volume 220 Author(s): Sofia V. Poimenidou, Vasiliki C. Bikouli, Chryssavgi Gardeli, Christina Mitsi, Petros A. Tarantilis, George-John Nychas, Panagiotis N. Skandamis Aqueous extract of Origanum vulgare (oregano), sodium hypochlorite (60 and 300ppm of free chlorine), Citrox® (containing citric acid and phenolic compounds [bioflavonoids] as active...
Tue, 01/19/2016 - 09:12
Publication date: 2 March 2016 , Volume 220 Author(s): Ga-Hee Ban, Dong-Hyun Kang This study was undertaken to evaluate the effectiveness of superheated steam (SHS) on the inactivation of Escherichia coli O157:H7, Salmonella Typhimurium, Salmonella Enteritidis phage type (PT) 30 and Listeria monocytogenes on almonds and in-shell pistachios and to determine the effect of superheated steam...
Tue, 01/12/2016 - 07:20
Publication date: June 2016 , Volume 64 Author(s): Kimberly D. Fisher, Christy L. Bratcher, Tony Z. Jin, Sacit F. Bilgili, Walter F. Owsley, Luxin Wang The goal of this study was to evaluate the efficacy of a novel antimicrobial solution made with chitosan, lauric arginate ester, and organic acids on Escherichia coli O157:H7, Salmonella spp., Listeria monocytogenes, and non-O157...
Tue, 01/12/2016 - 04:46
Abstract The increasing industrial interest in easy, economical and reliable methods has led to the development and application of DNA-based methods for the detection of microbial pathogens in food. In the present article, we describe the development of a cost-efficient EvaGreen-based real-time Polymerase chain reaction (PCR) technique for simultaneous and practical detection of Listeria...
Tue, 12/22/2015 - 16:27
Microbial pathogen infiltration in fresh leafy greens is a significant food safety risk factor. In various postharvest operations, vacuum cooling is a critical process for maintaining the quality of fresh produce. The overall goal of this study was to evaluate the risk of vacuum cooling-induced infiltration of Escherichia coli O157:H7 into lettuce using multiphoton microscopy. Multiphoton imaging...
Sun, 12/13/2015 - 02:29
The aim of the present study was to evaluate the effects of Ziziphora clinopodioides essential oil (0.1 and 0.2%) and nisin (250 and 500 IU/mL) separately and in combination on survival of Escherichia coli O157:H7 inoculated in Doogh (Iranian yoghurt drink) during storage under refrigerated temperature (4 ± 1°C) for 9 days. Viability of Lactobacillus casei at different concentrations of Z....
Thu, 12/03/2015 - 03:59
Publication date: Available online 20 November 2015 Author(s): Ahmad Almasoud, Navam Hettiarachchy, Srinivas Rayaprolu, Ronny Horax, Satchithanandam Eswaranandam Electrostatic spraying which has an even and retained surface coverage could be an effective novel technique to completely cover the surface of fresh produce to disrupt biofilm formation by pathogenic bacteria. Spinach...
Wed, 11/25/2015 - 19:00
A standardised method for determining Escherichia coli O157:H7 strain relatedness using whole genome sequencing or virulence gene profiling is not yet established. We sought to assess the capacity of either high-throughput polymerase chain reaction (PCR) of 49 virulence genes, core-genome single nt variants (SNVs) or k-mer clustering to discriminate between outbreak-associated and sporadic E....

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