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Bacterial pathogens

Fri, 07/03/2015 - 01:23
Tietao Wang, Meiru Si, Yunhong Song, Wenhan Zhu, Fen Gao, Yao Wang, Lei Zhang, Weipeng Zhang, Gehong Wei, Zhao-Qing Luo, Xihui Shen Type VI secretion systems (T6SSs) are widespread multi-component machineries that translocate effectors into either eukaryotic or prokaryotic cells, for virulence or for interbacterial competition. Herein, we report that the T6SS-4 from Yersinia pseudotuberculosis...
Fri, 07/03/2015 - 01:23
Publication date: Available online 2 July 2015 Author(s): Renhui Huang , Xueying Tao , Cuixiang Wan , Shengjie Li , Hengyi Xu , Feng Xu , Nagendra P. Shah , Hua Wei Lactobacillus plantarum ZDY 2013, a novel strain isolated from Chinese traditional fermented acid beans, was systematically evaluated for its survival capacity under stress conditions (pH, bile salt, simulated...
Fri, 07/03/2015 - 01:23
Publication date: Available online 2 July 2015 Author(s): P.E. Budri , N.C.C. Silva , E.C.R. Bonsaglia , A. Fernandes Júnior , J. P. Araújo Júnior , J.T. Doyama , J.L. Gonçalves , M.V. Santos , D. Fitzgerald-Hughes , V.L.M. Rall Bovine mastitis is an inflammation of the mammary glands of cows and causes significant economic losses in dairy cattle. Staphylococcus aureus is one of...
Fri, 07/03/2015 - 01:23
Publication date: Available online 2 July 2015 Author(s): M. Alsaaod , J.J. Niederhauser , G. Beer , N. Zehner , G. Schuepbach-Regula , A. Steiner Behavior is one of the most important indicators for assessing cattle health and well-being. The objective of this study was to develop and validate a novel algorithm to monitor locomotor behavior of loose-housed dairy cows based on the...
Thu, 07/02/2015 - 01:20
Julie Guignot, Audrey Segura, Guy Tran Van Nhieu Type III secretion systems (T3SSs) are specialized macromolecular machines critical for bacterial virulence, and allowing the injection of bacterial effectors into host cells. The T3SS-dependent injection process requires the prior insertion of a protein complex, the translocon, into host cell membranes consisting of two-T3SS hydrophobic proteins...
Thu, 07/02/2015 - 01:20
Yan Huang, Yiheng Pang, Hong Wang, Zhengzhu Tang, Yan Zhou, Weiyu Zhang, Xiugui Li, Dongmei Tan, Jian Li, Ying Lin, Xiaoling Liu, Weiyi Huang, Yunliang Shi Cronobacter spp. are emerging food-borne pathogens and have been identified as causative agents of meningitis and necrotizing enterocolitis in infants. Dehydrated rice is popular with a wide range of people and it is frequently used as a...
Thu, 07/02/2015 - 01:20
Sean M. Griffing, Duncan R. MacCannell, Amber J. Schmidtke, Molly M. Freeman, Eija Hyytiä-Trees, Peter Gerner-Smidt, Efrain M. Ribot, James L. Bono The objective of this study was to develop a canonical, parsimoniously-informative SNP panel for subtyping Shiga-toxin producing Escherichia coli (STEC) O157:H7 that would be consistent with epidemiological, PFGE, and MLVA clustering of human...
Thu, 07/02/2015 - 01:20
Anwesa Bag, Rabi Ranjan Chattopadhyay The present study was carried out to evaluate the possible synergistic interactions on antibacterial and antioxidant efficacy of essential oils of some selected spices and herbs [bay leaf, black pepper, coriander (seed and leaf), cumin, garlic, ginger, mustard, onion and turmeric] in combination. Antibacterial combination effect was evaluated against six...
Thu, 07/02/2015 - 01:20
Tara Grinnage-Pulley, Qijing Zhang The CmeABC multidrug efflux transporter of Campylobacter jejuni plays a key role in antimicrobial resistance and is suppressed by CmeR, a transcriptional regulator of the TetR family. Overexpression of CmeABC has been observed in laboratory-generated mutants, but it is unknown if this phenotype occurs naturally in C. jejuni isolates and if it has any functional...
Wed, 07/01/2015 - 01:25
The objective of this study was to investigate the inhibitory effect of Zataria multiflora boiss essential oils (ZEOs), ultraviolet (UV) radiation and their combination against Listeria monocytogenes biofilm in a simulated industrial model (SIM). The effect of minimal inhibitory concentration (MIC) and sub-MIC concentration of ZEOs, different contact time of UV and their combination was evaluated...
Wed, 07/01/2015 - 01:25
The growth of Yersinia enterocolitica and lactic acid bacteria in minced pork meat stored at 4C under vacuum and modified atmosphere packagingMAP) was determined. In addition, the influence of different pH values and total volatile basic nitrogen (TVB-N) on the growth of Y. enterocolitica was evaluated. Ground meat was packed under customary conditions using vacuum and modified atmospheres with...
Tue, 06/30/2015 - 20:00
Abstract To prevent the development and spread of spoilage/pathogenic microorganisms via meat foodstuffs, antimicrobial nanocomposite packaging can serve as a potential alternative. The objective of this study was to develop a new class of antimicrobial hybrid packaging mat composed of biodegradable polyurethane supplemented with virgin olive oil and zinc oxide via...
Tue, 06/30/2015 - 06:20
Publication date: Available online 24 June 2015 Author(s): Grégory Dubourg , Ziena Elsawi , Didier Raoult The bacteriocin-mediated antimicrobial properties of Lactobacillus spp. have been widely studied, leading to the use of these micro-organisms in the food industry as preservative agents against foodborne pathogens. In an era in which antibiotic resistance is becoming a public health...
Tue, 06/30/2015 - 06:20
Publication date: Available online 29 June 2015 Author(s): Boudewijn Catry , Marco Cavaleri , Keith Baptiste , Kari Grave , Kornelia Grein , Anja Holm , Helen Jukes , Ernesto Liebana , Antonio Lopez Navas , David Mackay , Anna-Pelagia Magiorakos , Miguel Angel Moreno Romo , Gérard Moulin , Cristina Muñoz Madero , Maria Constança Matias Ferreira Pomba , Mair Powell , Satu...
Tue, 06/30/2015 - 01:19
Polyana C. Tizioto, JaeWoo Kim, Christopher M. Seabury, Robert D. Schnabel, Laurel J. Gershwin, Alison L. Van Eenennaam, Rachel Toaff-Rosenstein, Holly L. Neibergs, Bovine Respiratory Disease Complex Coordinated Agricultural Project Research Team , Jeremy F. Taylor Susceptibility to bovine respiratory disease (BRD) is multi-factorial and is influenced by stress in conjunction with infection by...
Tue, 06/30/2015 - 01:19
Gender consideration, a risk factor in food processing system can enhance efficiency of food hazards critical control points (CCPs) and corrective measures for food safety and public health. The study objective was to examine gender related association in 'foofoo' processing and hazards in project cycle. Disaggregated gender cohorts were female adult (FA), male adult (MA), male child (MC), and...
Tue, 06/30/2015 - 01:19
Iron availability functions as an environmental cue for enteropathogenic bacteria, signaling arrival within the human host. As Enterotoxigenic Escherichia coli (ETEC) are a major cause of human diarrhea, the effect of iron on ETEC virulence factors was evaluated here. ETEC pathogenicity is directly linked to production of fimbrial colonization factors and secretion of heat-labile (LT) and/or heat...
Tue, 06/30/2015 - 01:19
Aims To identify lactic acid bacterial isolates that promote IgA production in honeybee products and honeybees (Apis mellifera). Methods and Results Pyrosequencing analysis of the microbiota of honeybee products and honeybees revealed the predominance of Lactobacillus kunkeei in honey, bee pollen, bee bread, and royal jelly. L. kunkeei was isolated from bee pollen, bee bread, and honey stomach...
Tue, 06/30/2015 - 01:19
Street vended foods are the vehicle of pathogens transmission resulting in foodborne diseases. The purpose of this paper is to propose a conceptual public health risks framework of consuming road vended foods based on detailed review of existing literature in developing countries. Although street food is enjoying a wide range of acceptability, microorganisms from the genus Campylobacter,...
Mon, 06/29/2015 - 01:25
Aims The presence of viable but nonculturable (VBNC) bacterial pathogens which often fail to be detected by cultivation and can regain the cultivability if the living conditions improve were reported. The objective of this study is to determine the occurrence of VBNC Salmonella spp. and Shigella spp. in the biosolids during anaerobic digestion and its reactivation during the cake storage....
Sat, 06/27/2015 - 01:24
Foodborne Pathogens and Disease , Vol. 0, No. 0.
Sat, 06/27/2015 - 01:24
Vibrio (V.) parahaemolyticus is an aquatic bacterium capable of causing foodborne gastroenteritis. In the environment or the food chain, V. parahaemolyticus cells are usually forced into the stationary phase, the common phase for bacterial survival in the environment. So far, little is known about whole genomic expression of V. parahaemolyticus in the early stationary phase compared with the...
Sat, 06/27/2015 - 01:24
Publication date: 1 October 2015 , Volume 210 Author(s): Achyut Adhikari , Roopesh M. Syamaladevi , Karen Killinger , Shyam S. Sablani This study investigated UV-C light inactivation of Escherichia coli O157:H7 and Listeria monocytogenes on the surface of organic apples, pears, strawberries, red raspberries and cantaloupes. Fruit surfaces spot inoculated with cocktail strains of E. coli...
Sat, 06/27/2015 - 01:24
Background. Although the T-cell subset differentiation pathway has been characterized extensively from the view of host gene regulation, the effects of genes of the pathogen on T-cell subset differentiation during infection have yet to be elucidated. Especially, the bacterial genes that are responsible for this shift have not yet been determined. Methods. Utilizing a single-gene-...
Fri, 06/26/2015 - 01:21
Aims This work evaluated the antibacterial activity of a water-soluble Moringa oleifera seed lectin (WSMoL) by evaluating its effect on growth, survival and cell permeability of Bacillus sp., Bacillus cereus, Bacillus pumillus, Bacillus megaterium, Micrococcus sp., Pseudomonas sp., Pseudomonas fluorescens, Pseudomonas stutzeri, and Serratia marcescens. In addition, the effect of lectin on...
Fri, 06/26/2015 - 01:21
Publication date: 1 October 2015 , Volume 210 Author(s): Suzana Reis Evangelista , Maria Gabriela da Cruz Pedroso Miguel , Cristina Ferreira Silva , Ana Carla Marques Pinheiro , Rosane Freitas Schwan The evaluation of the microbiota present during coffee wet fermentation was done in two distinct regions of Minas Gerais, Brazil: one farm in the South of Minas Gerais (Lavras = L) and...
Fri, 06/26/2015 - 01:21
Publication date: 1 October 2015 , Volume 210 Author(s): Shaun Smith , Joseph Meade , Kevina McGill , James Gibbons , Declan Bolton , Paul Whyte Extended spectrum β-lactamase (ESBL) producing Escherichia coli have emerged as a contaminant on modified charcoal cefoperazone deoxycholate agar (mCCDA) when attempting to selectively isolate Campylobacter spp. from poultry. E. coli are...
Fri, 06/26/2015 - 01:21
This study evaluated the efficacy of organic acids applied singly or in combination as postlethality dips to sliced uncured turkey deli loaves to inhibit the growth of Listeria monocytogenes (Lm) Scott A. Treatments consisted of sodium lactate (SL; 3.6%), potassium lactate (PL; 3.6%), sodium citrate (SC; 0.75%), a combination of SL and sodium diacetate (SDA; 0.25%), and a combination of SL/PL/SDA...
Thu, 06/25/2015 - 20:00
Abstract Thermal inactivation of normal and starved cells of Salmonella Enteritidis on chicken skin previously exposed to different concentrations of acidified sodium chlorite (ASC) or tri-sodium phosphate (TSP) was investigated. Inoculated skin was pretreated with different concentration of ASC or TSP, packaged in bags, and then immersed in a circulating water bath at 60 to 68...
Thu, 06/25/2015 - 01:28
Since their discovery in 1915, bacteriophages have been routinely used within Eastern Europe to treat a variety of bacterial infections. Although initially ignored by the West due to the success of antibiotics, increasing levels and diversity of antibiotic resistance is driving a renaissance for bacteriophage derived therapy, which is in part due to the highly specific nature of bacteriophages as...
Thu, 06/25/2015 - 01:28
Publication date: 1 October 2015 , Volume 210 Author(s): M.N. Losio , E. Pavoni , S. Bilei , B. Bertasi , D. Bove , F. Capuano , S. Farneti , G. Blasi , D. Comin , C. Cardamone , L. Decastelli , E. Delibato , P. De Santis , S. Di Pasquale , A. Gattuso , E. Goffredo , A. Fadda , M. Pisanu , D. De Medici The presence of foodborne pathogens ( Salmonella spp., Listeria...
Thu, 06/25/2015 - 01:28
Publication date: October 2015 , Volume 51 Author(s): E. Chaix , B. Broyart , O. Couvert , C. Guillaume , N. Gontard , V. Guillard A mechanistic model coupling O 2 and CO 2 mass transfer (namely diffusion and solubilisation in the food itself and permeation through the packaging material) to microbial growth models was developed aiming at predicting the shelf life of modified atmosphere...
Wed, 06/24/2015 - 20:00
Abstract Protein hydrolysates were prepared from chicken liver using fermentation and enzymatic hydrolysis. The lactic acid bacteria Pediococcus acidilactici NCIM5368 was employed in the fermentation process and a commercial protease (Alcalase® 2.5) was used in enzymatic hydrolysis. Chicken liver hydrolysates prepared by fermentation (FCLH) and enzymatic hydrolysis (ECLH)...
Wed, 06/24/2015 - 06:20
Few studies within the pathogenic field have used advanced imaging and analytical tools to quantitatively measure pathogenicity in vivo. In this work, we present a novel approach for the investigation of host–pathogen processes based on medium-throughput 3D fluorescence imaging. The guinea pig model for Shigella flexneri invasion of the colonic...
Wed, 06/24/2015 - 03:20
The class-II AP-endonuclease (XthA) acts on abasic sites of damaged DNA in bacterial base excision repair. We identified that the sliding DNA β-clamp forms in vivo and in vitro complexes with XthA in Mycobacterium tuberculosis. A novel 239QLRFPKK245 motif in the DNA-binding domain of XthA was found to be important for the interactions. Likewise, the peptide-binding-groove (PBG) and the C-terminal...
Wed, 06/24/2015 - 01:23
Publication date: 1 October 2015 , Volume 210 Author(s): Seonyeong Choi , Sunhyung Park , Yoonsook Kim , Byeong-sam Kim , Larry R. Beuchat , Kim Hoikyung , Jee-Hoon Ryu The synergistic effects of sequential treatments with chlorine dioxide (ClO 2 ) and drying in killing Salmonella enterica on the surface of chicken eggshells were investigated. Initial experiments were focused on...
Tue, 06/23/2015 - 01:22
Salmonella enteric serovar Typhimurium (S. Typhimurium), a major cause of food-borne illness, is capable of using a variety of carbon and nitrogen sources. Fructoselysine and glucoselysine are Maillard reaction products formed by the reaction of glucose or fructose, respectively, with the -amine group of lysine. We report here that S. Typhimurium utilizes fructoselysine and glucoselysine as...
Tue, 06/23/2015 - 01:22
In Salmonella enterica the thiamine biosynthetic intermediate 5-aminoimidazole ribonucleotide (AIR) can be synthesized de novo independent of the early purine biosynthetic reactions. This secondary route to AIR synthesis was dependent on i) amino-4-imidazolecarboxamide ribotide (AICAR) accumulation, ii) a functional phosphoribosylaminoimidazole-succinocarboxamide (SAICAR) synthetase (PurC, EC 6.3...
Tue, 06/23/2015 - 01:22
Siderophores, small iron-binding molecules secreted by many microbial species, capture environmental iron for transport back into the cell. Vibrio cholerae synthesizes and uses the catechol siderophore vibriobactin and also uses siderophores secreted by other species, including enterobactin produced by Escherichia coli. E. coli secretes both canonical cyclic enterobactin and also linear...
Tue, 06/23/2015 - 01:22
Aims The aim of this study was to study inactivation of different pathogenic bacteria on agar model surface using TiO2-UV photocatalysis (TUVP). Methods and Results A unified food surface model was simulated using Bacto™ agar, a routinely used microbial medium. The foodborne pathogenic bacteria Escherichia coli K12 (as a surrogate for Escherichia coli O157:H7), Salmonella Typhimurium,...
Sun, 06/21/2015 - 01:27
Publication date: October 2015 , Volume 51 Author(s): Ana Graça , David Santo , Eduardo Esteves , Carla Nunes , Maribel Abadias , Célia Quintas The present work's aim was to study the microbial quality of minimally processed apples commercialized in Portugal. Sixty eight samples of fresh-cut apple were analyzed before their best-before date in 2011 and 2012 for aerobic mesophilic and...
Sun, 06/21/2015 - 01:27
Aims Using molecular subtyping techniques, Listeria monocytogenes is divided into three major phylogenetic lineages, and a multiplex PCR method can differentiate five L. monocytogenes subgroups: 1/2a-3a, 1/2c-3c, 1/2b-3b-7, 4b-4d-4e, and 4a-4c. In the current study, we conducted genome comparisons and evaluated serotype-associated genes for their utility as a multiplex PCR-based method for...
Sat, 06/20/2015 - 01:23
Publication date: October 2015 , Volume 108 Author(s): M.K. Omer , B. Prieto , E. Rendueles , A. Alvarez-Ordoñez , K. Lunde , O. Alvseike , M. Prieto The aim of this trial was to describe physicochemical, microbiological and organoleptic characteristics of dry fermented sausages produced from high hydrostatic pressure (HHP) pre-processed trimmings. During ripening of the meat products...
Sat, 06/20/2015 - 01:23
Infection by human pathogens through the consumption of fresh, minimally processed produce and solid plant-derived foods is a major concern of the U.S. and global food industries and of public health services. Enterohemorrhagic Escherichia coli O157:H7 is a frequent and potent foodborne pathogen that causes severe disease in humans. Biofilms formed by E. coli O157:H7 facilitate cross-...
Sat, 06/20/2015 - 01:23
Bacteriophages UAB_Phi20, UAB_Phi78, and UAB_Phi87 were encapsulated in liposomes, and their efficacy in reducing Salmonella in poultry was then studied. The encapsulated phages had a mean diameter of 309 to 326 nm and a positive charge between +31.6 and +35.1 mV (pH 6.1). In simulated gastric fluid (pH 2.8), the titer of nonencapsulated phages decreased by 5.7 to 7.8 log units, whereas...
Sat, 06/20/2015 - 01:23
Antimicrobial resistance in microbes poses a global and increasing threat to public health. The horizontal transfer of antimicrobial resistance genes was thought to be due largely to conjugative plasmids or transposons, with only a minor part being played by transduction through bacteriophages. However, whole-genome sequencing has recently shown that the latter mechanism could be highly important...
Sat, 06/20/2015 - 01:23
Food-borne pathogen persistence in soil fundamentally affects the production of safe vegetables and small fruits. Interventions that reduce pathogen survival in soil would have positive impacts on food safety by minimizing preharvest contamination entering the food chain. Laboratory-controlled studies determined the effects of soil pH, moisture content, and soil organic matter (SOM) on the...
Sat, 06/20/2015 - 01:23
Disposal of fecally contaminated poultry litter by land application can deliver pathogens and fecal indicator bacteria (FIB) into receiving waters via runoff. While water quality is regulated by FIB enumeration, FIB testing provides inadequate information about contamination source and health risk. This microbial source tracking (MST) study compared the persistence of the Brevibacterium sp....
Sat, 06/20/2015 - 01:23
Campylobacter jejuni is a leading cause of human foodborne gastroenteritis worldwide. The interactions between this pathogen and the intestinal microbiome within a host are of interest as endogenous intestinal microbiota mediates a form of resistance to the pathogen. This resistance, termed colonization resistance, is the ability of commensal microbiota to prevent colonization by exogenous...
Sat, 06/20/2015 - 01:23
Yersiniosis is strongly associated with the consumption of pork contaminated with enteropathogenic Yersinia enterocolitica, which is harbored by domestic pigs without showing clinical signs of disease. In contrast to data on Y. enterocolitica isolated from conventionally reared swine, investigations into the occurrence of Y. enterocolitica in wild boars in Germany are rare. The objectives of the...

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