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Bacterial pathogens

Wed, 03/27/2019 - 01:14
Publication date: Available online 24 March 2019Source: LWTAuthor(s): Daizy Hwang, Elizabeth White, Anuj Purohit, Anand Mohan, Abhinav MishraAbstractSurvival of pathogenic bacteria under acidic conditions may pose a significant food safety challenge and should be assessed when developing new food products. The objective of this study was to determine the antimicrobial effect of two acidulants...
Wed, 03/27/2019 - 00:00
In the present study, 33 brands of mozzarella cheese (pasteurized cow milk mozzarella obtained by direct acidification through the addition of food-grade citric acid or obtained by natural acidification through the addition of thermophilic starter cultures, mozzarella for pizza mainly obtained by addition of citric acid, and pasteurized buffalo milk mozzarella obtained by adding microbial rennet...
Tue, 03/26/2019 - 14:32
Abstract Aims The purpose of this research was to determine optimum conditions for broth recovery of heat‐injured Salmonella Typhimurium and Escherichia coli O157:H7. Methods and Results Exposure to 55°C for 15 and 25 min, respectively, induced cellular injury to those pathogens. Comparison was made with the commonly used overlay method using selective medium for recovering sub‐lethally...
Tue, 03/26/2019 - 12:02
The Bay of Bengal is known as the epicenter for seeding several devastating cholera outbreaks across the globe. Vibrio cholerae, the etiological agent of cholera, has extraordinary competency to acquire exogenous DNA by horizontal gene transfer (HGT) and adapt them into its genome for structuring metabolic processes, developing drug resistance,...
Tue, 03/26/2019 - 12:02
Salmonella Typhimurium can invade and survive within macrophages where the bacterium encounters a range of host environmental conditions. Like many bacteria, S. Typhimurium rapidly responds to changing environments by the use of second messengers such as cyclic di-GMP (c-di-GMP). Here, we generate a fluorescent biosensor to measure c-di-GMP concentrations in...
Tue, 03/26/2019 - 10:03
Abstract In this study, we evaluated the temperature requirements for home delivery in Taiwan by considering food safety risks of chilled shrimp that may be contaminated with Vibrio parahaemolyticus. Pathogenic V. parahaemolyticus was chosen because it was the main cause of foodborne outbreaks originating from contaminated seafood in Taiwan. The risk of becoming ill due to consumption of raw...
Tue, 03/26/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 645-668, April 2019.
Tue, 03/26/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 669-676, April 2019.
Tue, 03/26/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 669-676, April 2019.
Tue, 03/26/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 645-668, April 2019.
Tue, 03/26/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 669-676, April 2019.
Tue, 03/26/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 645-668, April 2019.
Tue, 03/26/2019 - 01:15
Lorenzo Siroli, Lucia Camprini, Maria Barbara Pisano, Francesca Patrignani, Rosalba Lanciotti
Tue, 03/26/2019 - 01:14
Available online 24 March 2019 Author(s): Christian Vinueza-Burgos, María Baquero, José Medina, Lieven De ZutterAbstractSalmonella is a common foodborne pathogen in the poultry production systems. Its presence in this food industry is determined by the fact that it can survive and pass throughout the different steps in the poultry production. In this study we aimed to study the occurrence,...
Mon, 03/25/2019 - 17:00
Clifford Clark, Chrystal Berry, Walter Demczuk Campylobacter transducer-like proteins (Tlps), also known as methyl-accepting chemotaxis proteins (MCPs), are associated with virulence as well as niche and host adaptation. While functional attributes of these proteins are being elucidated, little has been published regarding their sequence diversity or chromosomal locations and context, although...
Mon, 03/25/2019 - 16:31
Publication date: June 2019 Environmental Research, Volume 173Author(s): Claire. M. Marik, Brienna Anderson-Coughlin, Samantha Gartley, Shani Craighead, Rhodel Bradshaw, Prachi Kulkarni, Manan Sharma, Kalmia E. KnielAbstractThe use of surface and recycled water sources for irrigation can reduce demand on critical groundwater resources. Treatment or mitigation may be necessary for the use of these...
Mon, 03/25/2019 - 16:31
Publication date: May 2019 Environmental Research, Volume 172Author(s): Channah M. Rock, Natalie Brassill, Jessica L. Dery, Dametreea Carr, Jean E. McLain, Kelly R. Bright, Charles P. GerbaAbstractQuestions related to the safety of alternative water sources, such as recycled water or reclaimed water (including grey water, produced water, return flows, and recycled wastewater), for produce...
Mon, 03/25/2019 - 16:31
Publication date: May 2019 Environmental Research, Volume 172Author(s): Joseph Haymaker, Manan Sharma, Salina Parveen, Fawzy Hashem, Eric B. May, Eric T. Handy, Chanelle White, Cheryl East, Rhodel Bradshaw, Shirley A. Micallef, Mary Theresa Callahan, Sarah Allard, Brienna Anderson, Shani Craighead, Samantha Gartley, Adam Vanore, Kalmia E. Kniel, Sultana Solaiman, Anthony Bui, Rianna...
Mon, 03/25/2019 - 11:20
The Type VI secretion system (T6SS) is an injection apparatus that uses a spring-like mechanism for effector delivery. The contractile tail is composed of a needle tipped by a sharpened spike and wrapped by the sheath that polymerizes in an extended conformation on the assembly platform or baseplate. Contraction of the sheath propels the needle and effectors associated with it into target cells....
Mon, 03/25/2019 - 11:00
The enteric pathogen Shigella is one of the leading causes of moderate-to-severe diarrhea and death in young children in developing countries. Transformed cell lines and animal models have been widely used to study Shigella pathogenesis. In addition to altered physiology, transformed cell lines are composed of a single cell type that does not sufficiently represent the complex multicellular...
Mon, 03/25/2019 - 11:00
Listeria innocua is considered a nonpathogenic Listeria species. Natural atypical hemolytic L. innocua isolates have been reported but have not been characterized in detail. Here, we report the genomic and functional characterization of representative isolates from the two known natural hemolytic L. innocua clades. Whole-genome sequencing confirmed the presence of Listeria pathogenicity islands (...
Mon, 03/25/2019 - 11:00
Clostridium perfringens enterotoxin (CPE) is a pore-forming toxin that causes the symptoms of common bacterial food poisoning and several non-foodborne human gastrointestinal diseases, including antibiotic-associated diarrhea and sporadic diarrhea. In some cases, CPE-mediated disease can be very severe or fatal due to the involvement of enterotoxemia. Therefore, the development of potential...
Mon, 03/25/2019 - 11:00
The enteric bacterium and intracellular human pathogen Shigella causes hundreds of millions of cases of the diarrheal disease shigellosis per year worldwide. Shigella is acquired by ingestion of contaminated food or water; upon reaching the colon, the bacteria invade colonic epithelial cells, replicate intracellularly, spread to adjacent cells, and provoke an intense inflammatory response. There...
Mon, 03/25/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 597-604, April 2019.
Mon, 03/25/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 597-604, April 2019.
Mon, 03/25/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 4, Page 597-604, April 2019.
Mon, 03/25/2019 - 01:10
Publication date: Available online 24 March 2019Source: LWTAuthor(s): Hatice Kavuncuoglu, Hasan Yalcin, Mehmet DoganAbstractPolyhedral oligomeric silsesquioxane (POSS) containing low-density polyethylene (LDPE) based innovative active nanocomposite food packaging films were produced using film blowing technique. Octa ammonium POSS (OA-POSS), N-Phenylaminopropyl POSS (AP-POSS), methacryl POSS (MA-...
Sun, 03/24/2019 - 12:06
Ethanolic coconut husk extract (ECHE) could be prepared using ethanol as the extracting solvent. The concentration of ethanol have a great impact on the antibacterial efficacy of ECHE. The ECHE extracted with 60% ethanol demonstrated bactericidal effect on the tested bacteria by causing cell wall damage, which could lead to cell death. Summary Antibacterial properties of ethanolic coconut...
Sun, 03/24/2019 - 12:06
Anti‐Listeria monocytogenes activity of heather extracts: growth inhibition, biofilm formation inhibition and susceptibility to adverse conditions increased. Summary In this work, heather and its flowers were studied regarding their antioxidant and antimicrobial activities. Plants were subjected to ultrasound‐assisted methanolic extraction followed by fractionation. A phytochemical...
Sun, 03/24/2019 - 10:30
The antimicrobial activity of different essential oils was screened against five Salmonella serotypes using disk diffusion. Cinnamon (Cinnamomum zeylanicum) and thyme (Thymus vulgaris) essential oils exhibited the highest activity with inhibition zones of 22.5–38.5 mm in diameter. These oils were also investigated for their ability to control Salmonella and mesophilic aerobic bacteria (MAB) in...
Sun, 03/24/2019 - 01:12
Available online 22 March 2019 Author(s): Alexander Gill, Catherine Carrillo, Micaela Hadley, Robyn Kenwell, Linda ChuiAbstractA 2016/2017 outbreak of Shiga toxin-producing Escherichia coli (STEC) O121 in Canada, was linked to wheat flour, milled at a single facility on three consecutive days in October 2016. Most Probable Number (MPN) estimates of the concentration of STEC O121 in the recalled...
Sun, 03/24/2019 - 01:12
Available online 22 March 2019 Author(s): Michelle Qiu Carter, Doris Feng, Hui Hong LiAbstractShiga toxin-producing Escherichia coli (STEC) is one of the most common causal agents of foodborne illness linked to fresh leafy vegetables. Here, we investigated the impact of spinach-associated microorganisms on proliferation and biofilm formation of STEC O157:H7 on stainless steel surfaces at...
Sun, 03/24/2019 - 01:12
Available online 22 March 2019 Author(s): Matthew Aijuka, Araceli E. Santiago, Jorge A. Girón, James P. Nataro, Elna M. BuysAbstractWe have previously shown that diarrheagenic Escherichia coli (DEC) and non-DEC are prevalent in food sources and irrigation water in South Africa. Recent data suggest that an increased relative abundance of faecal Enterobacteriaceae is associated with poorer health...
Sat, 03/23/2019 - 00:00
Toxins, Vol. 11, Pages 177: Targeted Mass Spectrometry Analysis of Clostridium perfringens Toxins Toxins doi: 10.3390/toxins11030177 Authors: Miloslava Duracova Jana Klimentova Alena Myslivcova Fucikova Lenka Zidkova Valeria Sheshko Helena Rehulkova Jiri Dresler Zuzana Krocova Targeted proteomics recently proved to be a technique for the detection and absolute quantification...
Fri, 03/22/2019 - 11:00
Bacteria of the genus Shigella, consisting of 4 species and >50 serotypes, cause shigellosis, a foodborne disease of significant morbidity, mortality, and economic loss worldwide. Classical Shigella identification based on selective media and serology is tedious, time-consuming, expensive, and not always accurate. A molecular diagnostic assay does not distinguish Shigella at the species level...
Fri, 03/22/2019 - 11:00
Shiga toxin-producing Escherichia coli (STEC) and Campylobacter jejuni are notable health hazards associated with the consumption of raw milk. These bacteria may colonize the intestines of asymptomatic cattle and enter bulk tank milk via fecal contamination during milking. We studied the frequency of STEC O157:H7 and C. jejuni contamination in tank milk (n = 785) and the in-line milk filters of...
Fri, 03/22/2019 - 01:19
Available online 20 March 2019 Author(s): Mariella Aalto-Araneda, Janne Lundén, Annukka Markkula, Satu Hakola, Hannu KorkealaAbstractListeria monocytogenes causes the foodborne illness listeriosis, which exhibits high fatality among people in risk groups. The incidence of listeriosis has increased in Europe, which raises concerns about L. monocytogenes occurrence in foodstuffs. Ready-to-eat...
Fri, 03/22/2019 - 01:19
Available online 21 March 2019 Author(s): Nodali Ndraha, Hsin-I. HsiaoAbstractWhile seafood is consumed worldwide, eating raw seafood is more popular in Asian countries. Consuming seafood promotes many health benefits, but is not risk free because it can be contaminated with foodborne pathogens, which can result in disease outbreaks. In this study, we performed the risk assessment of Vibrio...
Fri, 03/22/2019 - 01:18
Sandip Shrestha, Basanta R. Wagle, Abhinav Upadhyay, Komala Arsi, Indu Upadhyaya, Dan J. Donoghue, Annie M. Donoghue
Fri, 03/22/2019 - 00:00
Abstract Arabinofuranosidase plays an essential role in the process of hydrolysis of arabinoxylan (AX). Thermostable, versatile, and efficient arabinofuranosidase is thus of great interest for the biorefinery industry. A GH51 arabinofuranosidase, Abf51, from Hungateiclostridium clariflavum DSM 19732 was heterogeneously expressed in Escherichia coli. Abf51 was found to have an...

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