keyword
MENU ▼
Read by QxMD icon Read
search

stress salmonella

keyword
https://www.readbyqxmd.com/read/28074026/promyelocytic-leukemia-protein-pml-controls-listeria-monocytogenes-infection
#1
David Ribet, Valérie Lallemand-Breitenbach, Omar Ferhi, Marie-Anne Nahori, Hugo Varet, Hugues de Thé, Pascale Cossart
: The promyelocytic leukemia protein (PML) is the main organizer of stress-responsive subnuclear structures called PML nuclear bodies. These structures recruit multiple interactors and modulate their abundance or their posttranslational modifications, notably by the SUMO ubiquitin-like modifiers. The involvement of PML in antiviral responses is well established. In contrast, the role of PML in bacterial infection remains poorly characterized. Here, we show that PML restricts infection by the pathogenic bacterium Listeria monocytogenes but not by Salmonella enterica serovar Typhimurium...
January 10, 2017: MBio
https://www.readbyqxmd.com/read/28027943/fowl-typhoid-in-laying-hens-cause-hepatic-oxidative-stress
#2
Angelisa H Biazus, Aleksandro S Da Silva, Nathieli B Bottari, Matheus D Baldissera, Guilherme M do Carmo, Vera M Morsch, Maria Rosa C Schetinger, Renata Casagrande, Naiara S Guarda, Rafael N Moresco, Lenita M Stefani, Gabriela Campigotto, Marcel M Boiago
The aim of this study was to analyses nitric oxide, antioxidant status, and oxidative profile in the liver of laying hens naturally infected by Salmonella enterica subsp enterica serovar Gallinarum (S. Gallinarum). The nitrite/nitrate (NOx), reactive oxygen species (ROS), thiobarbituric acid-reactive substances (TBARS), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GPx) and glutathione S-transferase (GST) activities were measured in liver samples, as well the biomarkers of hepatic function (alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyltransferase (GGT), total protein and albumin levels measured in serum...
December 24, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28013440/equine-salmonellosis-in-southern-brazil
#3
Gregory Duarte Juffo, Daniele Mariath Bassuino, Danilo Carloto Gomes, Fabiana Wurster, Caroline Pissetti, Saulo Petinatti Pavarini, David Driemeier
The Salmonella sp. genus is identified in several species, and the zoonosis it causes is one of the most important types worldwide. The specifics of salmonellosis vary according to the function of the serovar involved, the species affected, age and predisposing factors. However, few cases of equine salmonellosis have been reported. This study presents ten confirmed salmonellosis cases in equines in southern Brazil. Six were adult animals with stress factors preceding the disease, while four were foals, three of which presented with hyperacute manifestations...
December 24, 2016: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28012986/increased-secretion-of-exopolysaccharide-and-virulence-potential-of-a-mucoid-variant-of-salmonella-enterica-serovar-montevideo-under-environmental-stress
#4
J Jean-Gilles Beaubrun, Ben D Tall, M-L Flamer, I Patel, G Gopinath, Winny Auguste, Catherine Jean, Melvin George, Carmen Tartera, L Ewing, D E Hanes
During an investigation to increase the recovery of Salmonella enterica from Oregano, an increased expression of exopolysaccharide was induced in Salmonella serovar Montevideo. The atypical mucoid (SAL242S) and the non-mucoid (SAL242) strains of Montevideo were compared and characterized using various methods. Serotyping analysis demonstrated that both strains are the same serovar Montevideo. Electron microscopy (EM) of cultured SAL242S cells revealed the production of a prominent EPS-like structure enveloping aggregates of cells that are composed of cellulose...
December 21, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28003197/elucidation-of-antibacterial-mechanism-of-405%C3%A2-5-nm-light-emitting-diode-against-salmonella-spp-at-refrigeration-temperature
#5
Min-Jeong Kim, Hyun-Gyun Yuk
: The aim of this study was to elucidate the antibacterial mechanism of 405±5 nm light-emitting diode (LED) illumination against Salmonella at 4 °C in phosphate-buffered saline (PBS) by determining endogenous coproporphyrin content, DNA oxidation, damage to membrane function, and morphological change. Gene expression levels, including oxyR, recA, rpoS, sodA, and soxR, were also examined to understand the response of Salmonella to LED illumination. Results showed that Salmonella spp...
December 21, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27999939/heat-survival-and-phenotype-microarray-profiling-of-salmonella-typhimurium-mutants
#6
Turki M Dawoud, Anita Khatiwara, Si Hong Park, Morgan L Davis, Christopher A Baker, Steven C Ricke, Young Min Kwon
Contamination of food products by pathogenic microorganisms continues to be a major public health and food industry concern. Non-typhoidal Salmonella species have led to numerous outbreaks associated with various foods. A wide variety of methods have been applied and introduced for treatment of fresh foods to eliminate pathogenic as well as spoilage microorganisms. Salmonella can become exposed to elevated temperatures while associated with hosts such as poultry. In addition, heat treatment is also applied at various stages of processing to retain the shelf life of food products...
December 21, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27999164/cytochrome-bd-dependent-bioenergetics-and-antinitrosative-defenses-in-salmonella-pathogenesis
#7
Jessica Jones-Carson, Maroof Husain, Lin Liu, David J Orlicky, Andrés Vázquez-Torres
: In the course of an infection, Salmonella enterica occupies diverse anatomical sites with various concentrations of oxygen (O2) and nitric oxide (NO). These diatomic gases compete for binding to catalytic metal groups of quinol oxidases. Enterobacteriaceae express two evolutionarily distinct classes of quinol oxidases that differ in affinity for O2 and NO as well as stoichiometry of H(+) translocated across the cytoplasmic membrane. The investigations presented here show that the dual function of bacterial cytochrome bd in bioenergetics and antinitrosative defense enhances Salmonella virulence...
December 20, 2016: MBio
https://www.readbyqxmd.com/read/27936347/the-infectious-intracellular-lifestyle-of-salmonella-enterica-relies-on-the-adaptation-to-nutritional-conditions-within-the-salmonella-containing-vacuole
#8
Lautaro Diacovich, Lucía Lorenzi, Mauro Tomassetti, Stéphane Méresse, Hugo Gramajo
Salmonella enterica serovar Typhimurium (S. Typhimurium) is a Gram-negative pathogen that causes various host-specific diseases. During their life cycle, Salmonellae survive frequent exposures to a variety of environmental stresses, e.g. carbon-source starvation. The virulence of this pathogen relies on its ability to establish a replicative niche, named Salmonella-containing vacuole, inside host cells. However, the microenvironment of the SCV and the bacterial metabolic pathways required during infection are largely undefined...
December 9, 2016: Virulence
https://www.readbyqxmd.com/read/27920756/salmonella-typhimurium-and-multidirectional-communication-in-the-gut
#9
REVIEW
Elena V Gart, Jan S Suchodolski, Thomas H Welsh, Robert C Alaniz, Ronald D Randel, Sara D Lawhon
The mammalian digestive tract is home to trillions of microbes, including bacteria, archaea, protozoa, fungi, and viruses. In monogastric mammals the stomach and small intestine harbor diverse bacterial populations but are typically less populated than the colon. The gut bacterial community (microbiota hereafter) varies widely among different host species and individuals within a species. It is influenced by season of the year, age of the host, stress and disease. Ideally, the host and microbiota benefit each other...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27916690/acyl-homoserine-lactone-changes-the-abundance-of-proteins-and-the-levels-of-organic-acids-associated-with-stationary-phase-in-salmonella-enteritidis
#10
Felipe Alves de Almeida, Natan de Jesus Pimentel-Filho, Lanna Clícia Carrijo, Cláudia Braga Pereira Bento, Maria Cristina Baracat-Pereira, Uelinton Manoel Pinto, Leandro Licursi de Oliveira, Maria Cristina Dantas Vanetti
Quorum sensing (QS) is cell-cell communication mechanism mediated by signaling molecules known as autoinducers (AIs) that lead to differential gene expression. Salmonella is unable to synthesize the AI-1 acyl homoserine lactone (AHL), but is able to recognize AHLs produced by other microorganisms through SdiA protein. Our study aimed to evaluate the influence of AI-1 on the abundance of proteins and the levels of organic acids of Salmonella Enteritidis. The presence of N-dodecyl-homoserine lactone (C12-HSL) did not interfere on the growth or the total amount of extracted proteins of Salmonella...
January 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27910884/the-hha-tomb-toxin-antitoxin-system-shows-conditional-toxicity-and-promotes-persister-cell-formation-by-inhibiting-apoptosis-like-death-in-s-typhimurium
#11
Sangeeta Jaiswal, Prajita Paul, Chandrashekhar Padhi, Shilpa Ray, Daniel Ryan, Shantoshini Dash, Mrutyunjay Suar
Toxin-antitoxin (TA) modules are two component "addictive" genetic elements found on either plasmid or bacterial chromosome, sometimes on both. TA systems perform a wide range of functions like biofilm formation, persistence, programmed cell death, phage abortive infection etc. Salmonella has been reported to contain several such TA systems. However, the hemolysin expression modulating protein (Hha) and its adjacent uncharacterized hypothetical protein TomB (previously known as YbaJ), have not been listed as a TA module in Salmonella...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27899116/the-correlation-between-antimutagenic-activity-and-total-phenolic-content-of-extracts-of-31-plant-species-with-high-antioxidant-activity
#12
Tshepiso Jan Makhafola, Esameldin Elzein Elgorashi, Lyndy Joy McGaw, Luc Verschaeve, Jacobus Nicolaas Eloff
BACKGROUND: Antimutagenic activity of plant extracts is important in the discovery of new, effective cancer preventing agents. There is increasing evidence that cancer and other mutation-related diseases can be prevented by intake of DNA protective agents. The identification of antimutagenic agents present in plants presents an effective strategy to inhibit pathogenic processes resulting from exposure to mutagenic and/or carcinogenic substances present in the environment. There are no reports on the antimutagenic activities of the plant species investigated in this study...
November 29, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27889173/variability-in-the-adaptive-acid-tolerance-response-phenotype-of-salmonella-enterica-strains
#13
Alexandra Lianou, George-John E Nychas, Konstantinos P Koutsoumanis
The objective of this study was the assessment of the stationary-phase, low-pH-inducible acid tolerance response (ATR) of different Salmonella enterica strains. For this purpose, 30 strains of the pathogen were grown in tryptone soy broth in the absence (non-adapted cultures) and presence (1% w/v; acid-adapted cultures) of glucose, and then subjected to 4-h acid challenge trials at pH 3.0. Surviving populations of each strain were determined at 1-h intervals, and the Weibull model was fitted to the derived microbiological data...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27884771/rapid-detection-of-salmonella-in-raw-chicken-breast-using-real-time-pcr-combined-with-immunomagnetic-separation-and-whole-genome-amplification
#14
Ji-Yeon Hyeon, Xiangyu Deng
We presented the first attempt to combine immunomagnetic separation (IMS), whole genome amplification by multiple displacement amplification (MDA) and real-time PCR for detecting a bacterial pathogen in a food sample. This method was effective in enabling real-time PCR detection of low levels of Salmonella enterica Serotype Enteritidis (SE) (∼10 CFU/g) in raw chicken breast without culture enrichment. In addition, it was able to detect refrigeration-stressed SE cells at lower concentrations (∼0.1 CFU/g) in raw chicken breast after a 4-h culture enrichment, shortening the detection process from days to hours and displaying no statistical difference in detection rate in comparison with a culture-based detection method...
May 2017: Food Microbiology
https://www.readbyqxmd.com/read/27879336/beyond-antimicrobial-resistance-evidence-for-a-distinct-role-of-the-acrd-efflux-pump-in-salmonella-biology
#15
Michelle M C Buckner, Jessica M A Blair, Roberto M La Ragione, Jane Newcombe, Daniel J Dwyer, Alasdair Ivens, Laura J V Piddock
: For over 20 years, bacterial multidrug resistance (MDR) efflux pumps have been studied because of their impact on resistance to antimicrobials. However, critical questions remain, including why produce efflux pumps under non-antimicrobial treatment conditions, and why have multiple pumps if their only purpose is antimicrobial efflux? Salmonella spp. possess five efflux pump families, including the resistance-nodulation-division (RND) efflux pumps. Notably, the RND efflux pump AcrD has a unique substrate profile, distinct from other Salmonella efflux pumps...
November 22, 2016: MBio
https://www.readbyqxmd.com/read/27869756/a-review-of-temperature-ph-and-other-factors-that-influence-the-survival-of-salmonella-in-mayonnaise-and-other-raw-egg-products
#16
REVIEW
Thilini Piushani Keerthirathne, Kirstin Ross, Howard Fallowfield, Harriet Whiley
Salmonellosis is one of the main causes of foodborne illnesses worldwide, with outbreaks predominately linked to contamination of eggs and raw egg products, such as mayonnaise. This review explores previous studies that have investigated Salmonella control mechanisms utilized in the production of raw egg mayonnaise and other food products. Apart from the use of pasteurized eggs, the main control mechanism identified is the pH of the raw egg products, which plays an important role in the consistency and stability while affecting the survival of Salmonella spp...
November 18, 2016: Pathogens
https://www.readbyqxmd.com/read/27865271/bacterial-contamination-of-eggs-and-behaviour-of-poultry-flocks-in-the-free-range-environment
#17
Talia Moyle, Kelly Drake, Vaibhav Gole, Kapil Chousalkar, Susan Hazel
The free range production system is becoming more common in Australia and is expected to increase. Free range hens are exposed to more stressors in comparison to hens from barn and cage systems and it is suggested that stress can increase bacterial shedding on eggs. The aims of this study were to examine the level of total bacteria and Enterobacteriaceae populations, as well as the presence of Salmonella and Campylobacter, in eggs collected from two free range flocks on two different farms and to conduct longitudinal observations of the behaviour and welfare of hens in the free range production system...
December 2016: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/27829584/fe-3-dependent-epistasis-between-the-cpxr-activated-loci-and-the-pmra-activated-lps-modification-loci-in-salmonella-enterica
#18
Akinori Kato, Nami Higashino, Ryutaro Utsumi
Bacteria utilize varying combinations of two-component regulatory systems, many of which respond and adapt closely to stress conditions, thus expanding their niche steadily. While mechanisms of recognition and avoidance of the specific Fe(3+) signal by the PmrA/PmrB system is well understood, those of the CpxR/CpxA system are more complex because they can be induced by various stress conditions, which, in turn, expresses a variety of phenotypes. Here, we highlight another aspect of the CpxR/CpxA system; mutations in degP and yqjA genes, which are under the control of the system, exhibit an iron sensitive phenotype in the mutant background defective in the PmrA-dependent gene products that alter the pyrophosphate status of the lipid A moiety of lipopolysaccharide in Salmonella enterica...
November 8, 2016: Journal of General and Applied Microbiology
https://www.readbyqxmd.com/read/27782347/natural-product-inspired-aminoepoxybenzoquinones-kill-members-of-the-gram-negative-pathogen-salmonella-by-attenuating-cellular-stress-response
#19
Franziska A Mandl, Volker C Kirsch, Ilke Ugur, Elena Kunold, Jan Vomacka, Christian Fetzer, Sabine Schneider, Klaus Richter, Thilo M Fuchs, Iris Antes, Stephan A Sieber
Gram-negative bacteria represent a challenging task for antibacterial drug discovery owing to their impermeable cell membrane and restricted uptake of small molecules. We herein describe the synthesis of natural-product-derived epoxycyclohexenones and explore their antibiotic activity against several pathogenic bacteria. A compound with activity against Salmonella Typhimurium was identified, and the target enzymes were unraveled by quantitative chemical proteomics. Importantly, two protein hits were linked to bacterial stress response, and corresponding assays revealed an elevated susceptibility to reactive oxygen species upon compound treatment...
November 14, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27716594/a-label-free-fluorescent-direct-detection-of-live-salmonella-typhimurium-using-cascade-triple-trigger-sequences-regenerated-strand-displacement-amplification-and-hairpin-template-generated-scaffolded-silver-nanoclusters
#20
Peng Zhang, Hui Liu, Xiaocheng Li, Suzhen Ma, Shuai Men, Heng Wei, Jingjing Cui, Hongning Wang
The harm of Salmonella typhimurium (S. typhimurium) to public health mainly by the consumption of contaminated agricultural products or water stresses an urgent need for rapid detection methods to help control the spread of S. typhimurium. In this work, an intelligently designed sensor system took creative advantage of triple trigger sequences-regenerated strand displacement amplification and self-protective hairpin template-generated-scaffolded silver nanoclusters (AgNCs) for the first time. In the presence of live S...
January 15, 2017: Biosensors & Bioelectronics
keyword
keyword
33743
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"