keyword
MENU ▼
Read by QxMD icon Read
search

Listeria

keyword
https://www.readbyqxmd.com/read/29782535/mycobacterium-tuberculosis-specific-cd4-and-cd8-t-cells-differ-in-their-capacity-to-recognize-infected-macrophages
#1
Jason D Yang, Daniel Mott, Rujapak Sutiwisesak, Yu-Jung Lu, Fiona Raso, Britni Stowell, Greg Hunter Babunovic, Jinhee Lee, Steve M Carpenter, Sing Sing Way, Sarah M Fortune, Samuel M Behar
Containment of Mycobacterium tuberculosis (Mtb) infection requires T cell recognition of infected macrophages. Mtb has evolved to tolerate, evade, and subvert host immunity. Despite a vigorous and sustained CD8+ T cell response during Mtb infection, CD8+ T cells make limited contribution to protection. Here, we ask whether the ability of Mtb-specific T cells to restrict Mtb growth is related to their capacity to recognize Mtb-infected macrophages. We derived CD8+ T cell lines that recognized the Mtb immunodominant epitope TB10...
May 21, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29781303/lavandula-x-intermedia-and-lavandula-angustifolia-essential-oils-phytochemical-composition-and-antimicrobial-activity-against-foodborne-pathogens
#2
Roberta Tardugno, Annalisa Serio, Federica Pellati, Serena D'Amato, Clemencia Chaves López, Maria Grazia Bellardi, Maura Di Vito, Vincenzo Savini, Antonello Paparella, Stefania Benvenuti
Four cultivars (cv) of Lavandula x intermedia ('Abrialis', 'Alba', 'Rinaldi Ceroni' (R.C.) and 'Sumiens') were cultivated in Italy and their essential oils (EOs) were distilled from Alfalfa Mosaic Virus-free plants. These EOs and one from L. angustifolia Miller were chemically characterised by GC-MS and GC-FID. Antimicrobial activity was evaluated against Listeria monocytogenes (24 strains) and Salmonella enterica (10 food strains). Minimal inhibitory concentrations (MIC) ≥ 10.0 μL/mL inhibited Salmonella (cv 'R...
May 21, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29778753/sm22-is-required-for-the-maintenance-of-actin-rich-structures-generated-during-bacterial-infections
#3
Michael Dominic Chua, Kevin Jay Hipolito, Onisukomen Benny Singerr, Julian Solway, Julian Andrew Guttman
The host actin cytoskeleton is utilized by an assortment of pathogenic bacteria to colonize and cause disease in their hosts. Two prominently studied actin-hijacking bacteria are enteropathogenic Escherichia coli (EPEC) and Listeria monocytogenes. EPEC form actin-rich pedestals atop its host cells to move across the intestinal epithelia, while Listeria monocytogenes generate branched actin networks arranged as actin clouds around the bacteria and as comet tails for propulsion within and amongst their host cells...
May 17, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29777759/plant-nutraceuticals-as-antimicrobial-agents-in-food-preservation-terpenoids-polyphenols-and-thiols
#4
REVIEW
Ignacio Gutiérrez-Del-Río, Javier Fernández, Felipe Lombó
Synthetic food additives generate a negative perception in consumers. Therefore, food manufacturers search for safer natural alternatives as those involving phytochemicals and plant essential oils. These bioactives have antimicrobial activities widely proved in in vitro tests. Foodborne diseases cause thousands of deaths and millions of infections every year, mainly due to pathogenic bacteria as Salmonella spp., Campylobacter spp., Escherichia coli, Bacillus cereus, Listeria monocytogenes or Staphylococcus aureus...
May 16, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29777679/development-of-dnazyme-based-pcr-signal-cascade-amplification-for-visual-detection-of-listeria-monocytogenes-in-food
#5
Zhanmin Liu, Chenhui Yao, Cuiyun Yang, Yanming Wang, Sibao Wan, Junyi Huang
Listeria monocytogenes is an important food-borne pathogen, and it can cause severe diseases. Rapid detection of L. monocytogenes is crucial to control this pathogen. A simple and robust strategy based on the cascade of PCR and G-quadruplex DNAzyme catalyzed reaction was used to detect L. monocytogenes. In the presence of hemin and the aptamer formed during PCR, the catalytic horseradish peroxidase-mimicking G-quadruplex DNAzymes allow the colorimetric responses of target DNA from L. monocytogenes. This assay can detect genomic DNA of L...
May 16, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29775724/biological-activities-and-phytocompounds-of-northwest-algeria-ajuga-iva-l-extracts-partial-identification-of-the-antibacterial-fraction
#6
Saida Medjeldi, Lamjed Bouslama, Amina Benabdalla, Rim Essid, Soumaya Haou, Salem Elkahoui
The use of synthetic food additive and the appearance of antibiotic resistance are at the basis of important human health problems. The substitution of synthetic compounds with new natural substances extracted from plants or microorganisms is therefore the ideal solution to this scourge. The objective of this work was to evaluate the phyto-constituents (polyphenols, flavonoids and condensed tannins), and to test the biological activities (antioxidant, antibacterial and antiviral) of the Ajuga iva (L) aerial part extracts...
May 15, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29775543/native-bacterial-communities-and-listeria-monocytogenes-survival-in-soils-collected-from-the-lower-mainland-of-british-columbia-canada
#7
Justin Falardeau, Khalil Walji, Maxime Haure, Karen Fong, Gregory A Taylor, Yussanne Ma, Sean Smukler, Siyun Wang
Soil is an important reservoir for Listeria monocytogenes, a foodborne pathogen implicated in numerous produce-related outbreaks. Our objective was to (i) compare the survival of L. monocytogenes between three soils, (ii) compare the native bacterial communities across these soils, and (iii) investigate relationships between L. monocytogenes survival, native bacterial communities, and soil properties. Listeria spp. populations were monitored on PALCAM agar in three soils inoculated with L. monocytogenes (~5 x 106 CFU/g): conventionally farmed (CS), grassland transitioning to conventionally farmed (TS), and uncultivated grassland (GS)...
May 18, 2018: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29773348/validation-of-standard-method-en-iso-11290-part-2-for-the-enumeration-of-listeria-monocytogenes-in-food
#8
Patricia Rollier, Bertrand Lombard, Laurent Guillier, Danièle François, Karol Romero, Sylvie Pierru, Laurence Bouhier, Nathalie Gnanou Besse
The reference method for the detection and enumeration of L. monocytogenes in food (Standards EN ISO 11290-1&2) have been validated by inter-laboratory studies in the frame of the Mandate M381 from European Commission to CEN. In this paper, the inter-laboratory studies led in 2013 on 5 matrices (cold-smoked salmon, milk powdered infant food formula, vegetables, environment, and cheese) to validate Standard EN ISO 11290-2 are reported. According to the results obtained, the method of the revised Standard EN ISO 11290-2 can be considered as a good method for the enumeration of L...
May 1, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29773170/iron-and-innate-antimicrobial-immunity-depriving-the-pathogen-defending-the-host
#9
REVIEW
Manfred Nairz, Stefanie Dichtl, Andrea Schroll, David Haschka, Piotr Tymoszuk, Igor Theurl, Günter Weiss
The acute-phase response is triggered by the presence of infectious agents and danger signals which indicate hazards for the integrity of the mammalian body. One central feature of this response is the sequestration of iron into storage compartments including macrophages. This limits the availability of this essential nutrient for circulating pathogens, a host defence strategy known as 'nutritional immunity'. Iron metabolism and the immune response are intimately linked. In infections, the availability of iron affects both the efficacy of antimicrobial immune pathways and pathogen proliferation...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29768464/photocatalytic-disinfection-of-surfaces-with-copper-doped-ti02-nanotube-coatings-illuminated-by-ceiling-mounted-fluorescent-light
#10
Tilen Koklic, Štefan Pintarič, Irena Zdovc, Majda Golob, Polona Umek, Alma Mehle, Martin Dobeic, Janez Štrancar
High economic burden is associated with foodborne illnesses. Different disinfection methods are therefore employed in food processing industry; such as use of ultraviolet light or usage of surfaces with copper-containing alloys. However, all the disinfection methods currently in use have some shortcomings. In this work we show that copper doped TiO2 nanotubes deposited on existing surfaces and illuminated with ceiling mounted fluorescent lights can retard the growth of Listeria Innocua by 80% in seven hours of exposure to the fluorescent lights at different places in a food processing plant or in the laboratory conditions with daily reinocuation and washing...
2018: PloS One
https://www.readbyqxmd.com/read/29768177/expression-of-the-dna-binding-factor-tox-promotes-the-encephalitogenic-potential-of-microbe-induced-autoreactive-cd8-t-cells
#11
Nicolas Page, Bogna Klimek, Mathias De Roo, Karin Steinbach, Hadrien Soldati, Sylvain Lemeille, Ingrid Wagner, Mario Kreutzfeldt, Giovanni Di Liberto, Ilena Vincenti, Thomas Lingner, Gabriela Salinas, Wolfgang Brück, Mikael Simons, Rabih Murr, Jonathan Kaye, Dietmar Zehn, Daniel D Pinschewer, Doron Merkler
Infections are thought to trigger CD8+ cytotoxic T lymphocyte (CTL) responses during autoimmunity. However, the transcriptional programs governing the tissue-destructive potential of CTLs remain poorly defined. In a model of central nervous system (CNS) inflammation, we found that infection with lymphocytic choriomeningitis virus (LCMV), but not Listeria monocytogenes (Lm), drove autoimmunity. The DNA-binding factor TOX was induced in CTLs during LCMV infection and was essential for their encephalitogenic properties, and its expression was inhibited by interleukin-12 during Lm infection...
May 15, 2018: Immunity
https://www.readbyqxmd.com/read/29764944/recon-dependent-inflammation-in-hepatocytes-enhances-listeria-monocytogenes-cell-to-cell-spread
#12
Adelle P McFarland, Thomas P Burke, Alexie A Carletti, Rochelle C Glover, Hannah Tabakh, Matthew D Welch, Joshua J Woodward
The oxidoreductase RECON is a high-affinity cytosolic sensor of bacterium-derived cyclic dinucleotides (CDNs). CDN binding inhibits RECON's enzymatic activity and subsequently promotes inflammation. In this study, we sought to characterize the effects of RECON on the infection cycle of the intracellular bacterium Listeria monocytogenes , which secretes cyclic di-AMP (c-di-AMP) into the cytosol of infected host cells. Here, we report that during infection of RECON-deficient hepatocytes, which exhibit hyperinflammatory responses, L...
May 15, 2018: MBio
https://www.readbyqxmd.com/read/29764842/role-of-the-hepcidin-ferroportin-axis-in-pathogen-mediated-intracellular-iron-sequestration-in-human-phagocytic-cells
#13
Rodrigo Abreu, Frederick Quinn, Pramod K Giri
Upon infection, pathogen and host compete for the same iron pool, because this trace metal is a crucial micronutrient for all living cells. Iron dysregulation in the host is strongly associated with poor outcomes in several infectious diseases, including tuberculosis, AIDS, and malaria, and inefficient iron scavenging by pathogens severely affects their virulence. Hepcidin is the master regulator of iron homeostasis in vertebrates, responsible for diminishing iron export from macrophages during iron overload or infection...
May 22, 2018: Blood Advances
https://www.readbyqxmd.com/read/29752379/rapid-remodeling-of-the-host-epithelial-cell-proteome-by-the-listeriolysin-o-pore-forming-toxin
#14
Julien Karim Malet, Francis Impens, Filipe Carvalho, Mélanie Anne Hamon, Pascale Cossart, David Ribet
Bacterial pathogens use various strategies to interfere with host cell functions. Among these strategies, bacteria modulate host gene transcription, thereby modifying the set of proteins synthetized by the infected cell. Bacteria can also target pre-existing host proteins and modulate their post-translational modifications or trigger their degradation. Analysis of protein levels variations in host cells during infection allows to integrate both transcriptional and post-transcriptional regulations induced by pathogens...
May 11, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29751496/prevalence-of-pathogens-in-poultry-meat-a-meta-analysis-of-european-published-surveys
#15
Andiara Gonçalves-Tenório, Beatriz Nunes Silva, Vânia Rodrigues, Vasco Cadavez, Ursula Gonzales-Barron
The objective of this study was to investigate and summarize the levels of incidence of Salmonella spp., Listeria monocytogenes , Staphylococcus aureus and Campylobacter spp. in poultry meat commercialized in Europe. After systematic review, incidence data and study characteristics were extracted from 78 studies conducted in 21 European countries. Pooled prevalence values from 203 extracted observations were estimated from random-effects meta-analysis models adjusted by pathogen, poultry type, sampling stage, cold preservation type, meat cutting type and packaging status...
May 3, 2018: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29751196/the-significance-role-of-regulatory-t-cells-in-the-persistence-of-infections-by-intracellular-bacteria
#16
REVIEW
Parisa Sabbagh, Ahmad Karkhah, Hamid Reza Nouri, Mostafa Javanian, Soheil Ebrahimpour
Regulatory T cells (Treg cells), are considered as effective immune cells playing a key role in immune response during cancers, autoimmune and infectious diseases. Regulatory T lymphocytes are divided into two main subgroups: natural Treg cells that generated during maturation in the thymus and have the suppressive activity that is critical for the establishment and maintenance of homeostasis in the body and induced Treg cells (iTreg) that are originated from naive T cells following the self-antigen recognition...
May 8, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29749650/irak4-activity-controls-immune-responses-to-intracellular-bacteria-listeria-monocytogenes-and-mycobacterium-smegmatis
#17
Goutham Pattabiraman, Michael Murphy, Federica Agliano, Keaton Karlinsey, Andrei E Medvedev
IL-1 receptor-associated kinase (IRAK) 4 is a central enzyme of the TLR pathways. This study tested the hypothesis that IRAK4 kinase activity is prerequisite for regulating innate immunity during infections with intracellular bacteria. To this end, we analyzed responses of macrophages obtained from mice expressing wild-type (WT) IRAK4 or its kinase-inactive K213M mutant (IRAK4KI ) upon infection with intracellular bacteria Listeria monocytogenes or Mycobacterium smegmatis. In contrast to robust induction of cytokines by macrophages expressing kinase-sufficient IRAK4, IRAK4KI macrophages expressed decreased TNF-α, IL-6, IL-1β, and C-C motif chemokine ligand 5 upon infection with L...
May 11, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29746835/complement-c3-drives-autophagy-dependent-restriction-of-cyto-invasive-bacteria
#18
Matthew T Sorbara, Elisabeth G Foerster, Jessica Tsalikis, Mena Abdel-Nour, Joseph Mangiapane, Imogen Sirluck-Schroeder, Ivan Tattoli, Rob van Dalen, David E Isenman, John R Rohde, Stephen E Girardin, Dana J Philpott
In physiological settings, the complement protein C3 is deposited on all bacteria, including invasive pathogens. However, because experimental host-bacteria systems typically use decomplemented serum to avoid the lytic action of complement, the impact of C3 coating on epithelial cell responses to invasive bacteria remains unexplored. Here, we demonstrate that following invasion, intracellular C3-positive Listeria monocytogenes is targeted by autophagy through a direct C3/ATG16L1 interaction, resulting in autophagy-dependent bacterial growth restriction...
May 9, 2018: Cell Host & Microbe
https://www.readbyqxmd.com/read/29746358/delayed-cerebral-injury-in-adults-with-bacterial-meningitis-a-novel-complication-of-adjunctive-steroids
#19
Cinthia Gallegos, Farrell Tobowlosky, Masayuki Nigo, Rodrigo Hasbun
OBJECTIVES: To report the prevalence of delayed cerebral injury in adults with bacterial meningitis and explore its association with adjunctive steroids. DESIGN: Retrospective analysis of adults with bacterial meningitis between 2005 and 2016. SETTING: Ten hospitals in the Greater Houston area. PATIENTS: Consecutive subjects with culture proven community-acquired bacterial meningitis. INTERVENTION: Subjects were categorized as receiving or not adjunctive steroids within 4 hours...
May 9, 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29742151/genetic-diversity-and-virulence-profiles-of-listeria-monocytogenes-recovered-from-bulk-tank-milk-milk-filters-and-milking-equipment-from-dairies-in-the-united-states-2002-to-2014
#20
Seon Woo Kim, Julie Haendiges, Eric N Keller, Robert Myers, Alexander Kim, Jason E Lombard, Jeffrey S Karns, Jo Ann S Van Kessel, Bradd J Haley
Unpasteurized dairy products are known to occasionally harbor Listeria monocytogenes and have been implicated in recent listeriosis outbreaks and numerous sporadic cases of listeriosis. However, the diversity and virulence profiles of L. monocytogenes isolates recovered from these products have not been fully described. Here we report a genomic analysis of 121 L. monocytogenes isolates recovered from milk, milk filters, and milking equipment collected from bovine dairy farms in 19 states over a 12-year period...
2018: PloS One
keyword
keyword
27853
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"