You are here

Bacterial pathogens

Fri, 08/23/2019 - 01:03
Available online 21 August 2019 Author(s): Gökhan Kürşad Incili, Ahmet Koluman, Ayşegül Aktüre, Ahmet AtaşalanAbstractEscherichia coli O157:H7 is one of the most important food-borne pathogens to threaten public health. Cultural methods are used as a gold standard while they are laborious and time-consuming. Loop-mediated isothermal amplification (LAMP) method is an alternative method that became...
Fri, 08/23/2019 - 01:03
Available online 21 August 2019 Author(s): Ziyi Hu, Alina Rohde, Lynn McMullen, Michael GänzleAbstractCattle are a reservoir for enterohemorrhagic Escherichia coli (EHEC), and ground beef is a major vehicle for human infection with EHEC. Heat resistance of E. coli, including EHEC, is impacted by NaCl and other additives. This study aimed to evaluate the effect of NaCl and other additives on the...
Fri, 08/23/2019 - 01:03
Available online 22 August 2019 Author(s): Hui-Erh Chai, Cheng-An Hwang, Lihan Huang, Vivian C.H. Wu, Lee-Yan SheenAbstractThe objective of this study was to evaluate the feasibility and efficacy of using chlorine dioxide (ClO2) gas generated by dry media (sodium chlorite and ferric chloride) and sodium chlorite-hydrogen chloride dosing methods for decontamination of foodborne pathogens on...
Fri, 08/23/2019 - 01:03
Available online 21 August 2019 Author(s): Lihui Zhang, Lixia Hou, Shuang Zhang, Xiaoxi Kou, Rui Li, Shaojin WangAbstractWater activity (aw) and heating rates are two major factors altering heat resistance of food-borne pathogens. The specific mechanism of heat resistance triggered by these two factors is still unclear. In this study, S. aureus ATCC 25923 was inoculated in walnut shells with two...
Fri, 08/23/2019 - 01:03
Publication date: Available online 22 August 2019Source: LWTAuthor(s): Shunmugavel Uma Maheshwari, Sundarajan Amutha, Rangasamy Anandham, Ganapathyswamy Hemalatha, Natesan Senthil, Soon Woo Kwon, Natesan SivakumarAbstract:Panchamirtham is a fermented fruit mix made from natural fermentation of fruits (banana, brown sugar, seedless dates, sugar candy, honey, cardamom and ghee), which offers...
Thu, 08/22/2019 - 17:00
Sivan Laviad-Shitrit, Ido Izhaki, Malka Halpern Vibrio cholerae is the causative agent of cholera, a life-threatening diarrheal disease. Cholera causes epidemics and pandemics, but the ways this disease spreads worldwide is still unclear. This review highlights a relatively new hypothesis regarding the way V. cholerae can be globally dispersed. Copepods and chironomids are natural reservoirs of...
Thu, 08/22/2019 - 17:00
Tra-My Duong-Nu, Kwangjoon Jeong, Seol Hee Hong, Sao Puth, Soo Young Kim, Wenzhi Tan, Kwang Ho Lee, Shee Eun Lee, Joon Haeng Rhee The tad operons encode the machinery required for adhesive Flp (fimbrial low-molecular-weight protein) pili biogenesis. Vibrio vulnificus, an opportunistic pathogen, harbors three distinct tad loci. Among them, only tad1 locus was highly upregulated in in vivo growing...
Thu, 08/22/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 9, Page 1607-1614, September 2019.
Thu, 08/22/2019 - 01:03
Available online 28 July 2019 Author(s): Alejandro Garrido-Maestu, Sarah Azinheiro, Joana Carvalho, Pablo Fuciños, Marta PradoAbstractE. coli O157 is the most commonly identified serotype among Shiga like-toxin E. coli infections. Current reference methodologies to detect these bacteria are reliable but take several days to provide a definitive result, as they require selective enrichment,...
Thu, 08/22/2019 - 01:03
Available online 8 August 2019 Author(s): Hossein Daryaei, Qian Sui, Hui Liu, André Rehkopf, Walter Peñaloza, Andreas Rytz, Yuqi Luo, Jason WanAbstractTwenty-two Shiga toxin-producing Escherichia coli (STEC) strains and six potential surrogates (E. coli strains K12 and P1, Listeria innocua, Lactobacillus plantarum, Bifidobacterium lactis, and Enterococcus faecium) were screened in wheat flour at...
Thu, 08/22/2019 - 01:03
Available online 14 August 2019 Author(s): E. Gkogka, M.W. Reij, L.G.M. Gorris, M.H. ZwieteringAbstractTo assess the risk of C. perfringens toxico-infections related to the consumption of Cornish pasties in the United Kingdom, a stochastic risk assessment model was created. Exposure to the pathogen was modelled as the result of contamination of different ingredients (i.e. beef and pepper),...
Thu, 08/22/2019 - 01:03
Available online 16 August 2019 Author(s): María Isabel Rodríguez-López, María Teresa Mercader-Ros, José Antonio Pellicer, Vicente M. Gómez-López, Domingo Martínez-Romero, Estrella Núñez-Delicado, José A. GabaldónAbstractMonoterpenes have antimicrobial properties but are associated with strong smells and flavors that limit their use in foods; therefore, strategies to keep their effectivity using...
Thu, 08/22/2019 - 01:03
Available online 20 August 2019 Author(s): Samet Ozturk, Fanbin Kong, Rakesh K. SinghAbstractSalmonella contamination of various seasonings and spices has occurred in the last decade. Radio frequency (RF) heating has been shown to be a potential alternative inactivation method for pathogens in low moisture foods (LMF), including spices and vegetable powders. This study aimed to (1) determine the...
Thu, 08/22/2019 - 01:03
Available online 21 August 2019 Author(s): Chenlu Zhou, Mengya Zhu, Yongjuan Wang, Zhenquan Yang, Mao Ye, Litin Wu, Hongduo Bao, Maoda Pang, Yan Zhou, Ran Wang, Lichang Sun, Heye Wang, Chengkun Zheng, Hui ZhangAbstractListeria monocytogenes is a food borne pathogen causing listeriosis in humans and animals. L. monocytogenes can tolerate severe environments and food processing conditions by...
Thu, 08/22/2019 - 01:03
Publication date: January 2020 , Volume 107Author(s): Beihua Zhang, Lihui Zhang, Teng Cheng, Xiangyu Guan, Shaojin WangAbstractContaminated condiments with low water activity (aw) have encouraged the scientific community to study effective thermal methods of inactivating pathogens. The aim of this study was to identify whether microbial thermo-tolerance in red pepper powder was affected by water...
Thu, 08/22/2019 - 01:03
Available online 20 August 2019 Author(s): Xinyao Wei, Soon Kiat Lau, Boreddy Sreenivasula Reddy, Jeyamkondan SubbiahAbstractSpray dried egg white powder (EWP) is traditionally processed by hot room treatment for a prolonged period of time (67 °C for 15 days) to enhance its functionality (foaming and gelling) and to microbial safety of EWP. Our prior research demonstrated that radio-frequency (RF...
Thu, 08/22/2019 - 01:03
Publication date: Available online 21 August 2019Source: LWTAuthor(s): Lenka Necidová, Bohdana Mrňousová, Danka Haruštiaková, Šárka Bursová, Bohumíra Janštová, Jozef GolianAbstractOur study evaluated the possibility of survival and growth of L. monocytogenes in 9 types of ready-to-eat foods. The evaluation was focused on the effectiveness of selected preservatives, namely sodium benzoate mixed...
Thu, 08/22/2019 - 00:00
In our previous study, we observed the sporadic presence of potentially heat-injured cells of Listeria innocua in ice cream mix following a selective enrichment protocol. Although injured cells have not yet been reported to cause any disease outbreaks, it is important to understand their presence in heat-treated food matrices. In this study, we propose a possible protective role of air pockets...
Wed, 08/21/2019 - 20:00
Shigellosis is a public health threat in developed as well as developing countries like India. While antibiotic therapy is the mainstay of treatment for shigellosis, current emergence of multidrug-resistant strains of Shigella spp. has posed the problem more challenging. Lytic bacteriophages which destroy antibiotic resistant Shigella spp. have great potential in this context. In this study we...
Wed, 08/21/2019 - 15:00
Abstract Wheat flour may be thermally processed to improve microbiological safety; however, come‐up time for thermal processing of wheat flour is long due to its low thermal conductivity. In the present study, a novel radiofrequency (RF)‐assisted thermal processing approach was investigated for reducing the come‐up time of soft wheat flour (SWF) and for improving microbiological safety. The...
Wed, 08/21/2019 - 11:00
In recent years nontyphoidal Salmonella has emerged as one of the pathogens most frequently isolated from the bloodstream in humans. Only a small group of Salmonella serovars cause this systemic infection, known as invasive nontyphoidal salmonellosis. Here, we present a focused minireview on Salmonella enterica serovar Panama, a serovar responsible for invasive salmonellosis worldwide. S. Panama...
Wed, 08/21/2019 - 11:00
Enterohemorrhagic Escherichia coli (EHEC) has at least three enzymes, NorV, Hmp, and Hcp, that act independently to lower the toxicity of nitric oxide (NO), a potent antimicrobial molecule. This study aimed to reveal the cooperative roles of these defensive enzymes in EHEC against nitrosative stress. Under anaerobic conditions, combined deletion of all three enzymes significantly increased the NO...
Wed, 08/21/2019 - 11:00
Salmonella enterica serovar Typhimurium (S. Typhimurium) induces inflammatory changes in the ceca of streptomycin-pretreated mice. In this mouse model of colitis, the type III secretion system 1 (T3SS-1) has been shown to induce rapid inflammatory change in the cecum at early points, 10 to 24 h after infection. Five proteins, SipA, SopA, SopB, SopD, and SopE2, have been identified as effectors...
Wed, 08/21/2019 - 08:32
Abstract In this study, silver (Ag), zinc oxide (ZnO), and copper oxide (CuO) metallic nanoparticles were used in preparation of carboxymethyl cellulose (CMC) nanobiocomposite films. Scanning electron microscopy (SEM), X‐ray diffraction (EDXA), water vapor permeability (WVP), ultraviolet and visible light (UV–Vis) spectroscopy, and mechanical and microbial tests were used to determine the...
Wed, 08/21/2019 - 08:22
Abstract This investigation we evaluated the feasibility of using the insulated isothermal polymerase chain reaction (iiPCR) reagent in a POCKIT system to detect Staphylococcus aureus in foods by comparing its results with those obtained using quantitative PCR (qPCR). The iiPCR/POCKIT system could specifically detect S. aureus and Staphylococcus spp. and differentiate them from 10 other...
Wed, 08/21/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 9, Page 1591-1597, September 2019.
Wed, 08/21/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 9, Page 1575-1582, September 2019.
Tue, 08/20/2019 - 20:00
Multistate foodborne disease outbreaks and recalls of apples and apple products contaminated with Listeria monocytogenes demonstrate the need for improved pathogen control in the apple supply chain. Apple process...
Tue, 08/20/2019 - 20:00
ABSTRACT The aim of this study was to investigate the prevalence and genotypic characteristics of Cronobacter isolated from powdered infant formula (PIF) manufacturing facilities and identify the potential source of contamination. A total of 42 Cronobacter isolates (5%) were detected in 835 environmental samples collected during the surveillance study. These isolates included C. sakazakii (n=37...
Tue, 08/20/2019 - 17:00
Sean Giacomucci, Candice Danabé-Nieto Cros, Xavier Perron, Annabelle Mathieu-Denoncourt, Marylise Duperthuy Biofilm formation is a common strategy used bacteria in order to survive and persist in the environment. In Vibrio cholerae (V. cholerae), a Gram-negative pathogen responsible for the cholera disease, biofilm-like aggregates are important for the pathogenesis and disease transmission....
Tue, 08/20/2019 - 12:53
Abstract Aims An extensive source investigation was conducted on a dairy farm with neurolisteriosis and subclinical mastitis cases to identify infection source and potential transmission routes of Listeria monocytogenes. Methods and Results A total of 36 L. monocytogenes isolates were obtained from animal clinical cases (neurolisteriosis and udder infection) and the farm environment (silage,...
Tue, 08/20/2019 - 07:18
Abstract Alfalfa sprouts have been implicated in multiple foodborne disease outbreaks. This study evaluated the growth of Listeria monocytogenes during sprouting of alfalfa seeds and the effectiveness of daily chlorine dioxide & ozone rinsing in controlling the growth. Alfalfa seeds inoculated with L. monocytogenes were sprouted for 5 days (25°C) with a daily aqueous ClO2 (3 ppm, 10 min) or...
Tue, 08/20/2019 - 06:04
Abstract Lactic acid bacteria and Listeria monocytogenes are psychotropic organisms that can grow and compete in food such as lightly preserved fishery products. Predictive microbiology is nowadays one of the leading tools to assess the behavior of bacteria in food and to predict food spoilage. Mathematical models can be used to predict the growth, inactivation or growth probability of bacteria....
Tue, 08/20/2019 - 01:05
Available online 17 August 2019 Author(s): F.F. Parlapani, F. Syropoulou, A. Tsiartsafis, S. Ekonomou, P. Madesis, A. Exadactylos, I.S. BoziarisAbstractHigh-resolution melting (HRM) analysis followed by sequencing was applied for determination of bacteria grown on plates isolated from farmed mussels (Mytilus galloprovincialis) during their storage at 4 °C. The V3–V4 region of the 16S rRNA gene...
Tue, 08/20/2019 - 01:05
Available online 17 August 2019 Author(s): Alejandra Orihuel, Lucrecia Terán, Jenny Renaut, Sébastien Planchon, María Pía Valacco, Emilse Masias, Carlos Minahk, Graciela Vignolo, Silvia Moreno, André M. De Almeida, Lucila Saavedra, Silvina FaddaAbstractThe enterohemorrhagic Escherichia (E.) coli (EHEC) is a pathogen of great concern for public health and the meat industry all over the world. The...
Mon, 08/19/2019 - 11:10
Staphylococcus aureus has evolved a complex regulatory network that controls a multitude of defense mechanisms against the deleterious effects of oxidative stress stimuli subsequently leading to the pathogen's survival and persistence in the hosts. Previously, we characterized the msaABCR operon as a regulator of virulence, antibiotic resistance, and the formation of persister cells in S. aureus...
Mon, 08/19/2019 - 08:08
Abstract Listeria monocytogenes is a foodborne pathogen widely distributed in nature. The aims of this study were to evaluate the occurrence of Listeria spp. in three dairy plants located in Southern Brazil, and to characterize the L. monocytogenes isolates according to serotypes, virulence genes, and PFGE. A total of 212 samples were collected, and 15 were positive for Listeria spp., of which...
Mon, 08/19/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 9, Page 1560-1567, September 2019.
Mon, 08/19/2019 - 03:00
Journal of Food Protection, Volume 82, Issue 9, Page 1560-1567, September 2019.
Mon, 08/19/2019 - 01:05
Publication date: January 2020 , Volume 107Author(s): Angelo Colagiorgi, Rossella Festa, Pierluigi A. Di Ciccio, Marta Gogliettino, Marco Balestrieri, Gianna Palmieri, Aniello Anastasio, Adriana IanieriAbstractStaphylococcal food poisoning – caused by certain enterotoxigenic staphylococci – is one of the most common worldwide foodborne diseases. In this context, bacterial biofilms on food...
Sat, 08/17/2019 - 01:08
Publication date: Available online 15 August 2019 Innovative Food Science & Emerging TechnologiesAuthor(s): Hiba N. Rajha, Anna-Maria Abi Khattar, Sally El Kantar, Nadia Boussetta, Nikolai Lebovka, Richard G. Maroun, Nicolas Louka, Eugene VorobievAbstractThe effects of aqueous extraction of bioactive compounds from pomegranate peels using conventional extraction (CE) and extraction assisted...
Sat, 08/17/2019 - 01:04
Available online 16 August 2019 Author(s): Jitendra Patel, Hsin-Bai Yin, Gary Bauchan, Joseph MoweryAbstractEscherichia coli O157:H7 and Salmonella enterica are foodborne pathogens with major public health concern in the U.S. These pathogens utilize several virulence factors to initiate infections in humans. The antimicrobial effect of seven glucosinolate hydrolysis compounds against Salmonella...
Sat, 08/17/2019 - 00:00
Abstract This study was performed to determine quality changes of battered and breaded pre-fried snack product developed from large sized (5.5–10.5 kg) Catla (Catla catla) fish stored at chilled temperature (− 2 to − 4 °C). Quality changes were assessed based on biochemical, microbiological and sensory quality evaluation at 2 days interval for a period of 18 days. Results of...
Fri, 08/16/2019 - 14:50
SiiA is required for the function of the Salmonella SPI4‐encoded T1SS. Using structural and functional studies, we show that the periplasmic domain of SiiA displays a peptidoglycan (PG)‐binding OmpA‐like fold and that SiiA binds PG in vitro and in vivo, albeit at an acidic pH, only. SiiA in complex with SiiB translocates protons across the inner membrane; however, further studies are needed to...

Pages