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https://www.readbyqxmd.com/read/29677551/growth-detection-and-virulence-of-listeria-monocytogenes-in-the-presence-of-other-microorganisms-microbial-interactions-from-species-to-strain-level
#1
REVIEW
Evangelia A Zilelidou, Panagiotis N Skandamis
Like with all food microorganisms, many basic aspects of L. monocytogenes life are likely to be influenced by its interactions with bacteria living in close proximity. This pathogenic bacterium is a major concern both for the food industry and health organizations since it is ubiquitous and able to withstand harsh environmental conditions. Due to the ubiquity of Listeria monocytogenes, various strains may contaminate foods at different stages of the supply chain. Consequently, simultaneous exposure of consumers to multiple strains is also possible...
April 12, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29677385/identification-and-characterization-of-two-novel-c-type-lectins-from-the-larvae-of-housefly-musca-domestica-l
#2
Jing Zhou, Nai-Nai Fang, Ya Zheng, Kai-Yu Liu, Bin Mao, Li-Na Kong, Ya Chen, Hui Ai
Lectins and antimicrobial peptides (AMPs) are widely distributed in various insects and play crucial roles in primary host defense against pathogenic microorganisms. Two AMPs (cecropin and attacin) have been identified and characterized in the larvae of housefly. In this study, two novel C-type lectins (CTLs) were obtained from Musca domestica, while their agglutinating and antiviral properties were evaluated. Real-time PCR analysis showed that the mRNA levels of four immune genes (MdCTL1, MdCTL2, Cecropin, and Attacin) from M...
April 20, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29677222/understanding-the-impact-of-the-cofactor-swapping-of-isocitrate-dehydrogenase-over-the-growth-phenotype-of-escherichia-coli-on-acetate-by-using-constraint-based-modeling
#3
Erick Armingol, Eduardo Tobar, Ricardo Cabrera
It has been proposed that NADP+-specificity of isocitrate dehydrogenase (ICDH) evolved as an adaptation of microorganisms to grow on acetate as the sole source of carbon and energy. In Escherichia coli, changing the cofactor specificity of ICDH from NADP+ to NAD+ (cofactor swapping) decreases the growth rate on acetate. However, the metabolic basis of this phenotype has not been analyzed. In this work, we used constraint-based modeling to investigate the effect of the cofactor swapping of ICDH in terms of energy production, response of alternative sources of NADPH, and partitioning of fluxes between ICDH and isocitrate lyase (ICL) -a crucial bifurcation when the bacterium grows on acetate-...
2018: PloS One
https://www.readbyqxmd.com/read/29677131/solid-phase-adsorption-toxin-tracking-spatt-technology-for-the-monitoring-of-aquatic-toxins-a-review
#4
REVIEW
Mélanie Roué, Hélène Taiana Darius, Mireille Chinain
The Solid Phase Adsorption Toxin Tracking (SPATT) technology, first introduced in 2004, uses porous synthetic resins capable of passively adsorbing toxins produced by harmful microalgae or cyanobacteria and dissolved in the water. This method allows for the detection of toxic compounds directly in the water column and offers numerous advantages over current monitoring techniques (e.g., shellfish or fish testing and microalgae/cyanobacteria cell detection), despite some limitations. Numerous laboratory and field studies, testing different adsorbent substrates of which Diaion® HP20 resin appears to be the most versatile substrate, have been carried out worldwide to assess the applicability of these passive monitoring devices to the detection of toxins produced by a variety of marine and freshwater microorganisms...
April 20, 2018: Toxins
https://www.readbyqxmd.com/read/29676891/the-pyroelectric-effect-enables-simple-and-rapid-evaluation-of-biofilm-formation
#5
Oriella Gennari, Valentina Marchesano, Romina Rega, Laura Mecozzi, Filomena Nazzaro, Florinda Fratianni, Raffaele Coppola, Luca Masucci, Emanuela Mazzon, Alessia Bramanti, Pietro Ferraro, Simonetta Grilli
Biofilms are detrimental to human life and industrial processes due to potential infections, contaminations and deterioration. Therefore, the evaluation of microbial capability to form biofilms is of fundamental importance for assessing how different environmental factors may affect their vitality. Nowadays, the approaches used for biofilm evaluation are still poor in reliability and rapidity and often provide contradictory results. Here we present what we call Biofilm Electrostatic Test (BET) as a simple, rapid and high reproducible tool for evaluating in vitro the ability of bacteria to form biofilms through the electrostatic interaction with a pyro-electrified carrier...
April 20, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29676754/carbon-nanotubes-as-antimicrobial-agents-for-water-disinfection-and-pathogen-control
#6
Dan Liu, Yiqin Mao, Lijun Ding
Waterborne diseases significantly affect human health and are responsible for high mortality rates worldwide. Antibiotics have been known for decades for treatment of bacterial strains and their overuse and irrational applications are causing increasing bacteria resistance. Therefore, there is a strong need to find alternative ways for efficient water disinfection and microbial control. Carbon nanotubes (CNTs) have demonstrated strong antimicrobial properties due to their remarkable structure. This paper reviews the antimicrobial properties of CNTs, discusses diverse mechanisms of action against microorganisms as well as their applicability for water disinfection and microbial control...
April 2018: Journal of Water and Health
https://www.readbyqxmd.com/read/29676446/an-approach-on-the-potential-use-of-probiotics-in-the-treatment-of-skin-conditions-acne-and-atopic-dermatitis
#7
REVIEW
Vitória H M Mottin, Edna S Suyenaga
Acne and Atopic Dermatitis (AD) are chronic inflammatory skin conditions with severe impact on a patient's life. Current treatments are related to adverse effects and do not represent a definitive cure. The present paper reviews the alterations in skin microbiome, specifically in acne and AD, and aims in searching for potential treatments based on benefic microorganisms, called probiotics. The review was made through bibliographic search of the main databases (Science Direct, PubMed, Scielo, Medline) between September 2015 and June 2016...
April 20, 2018: International Journal of Dermatology
https://www.readbyqxmd.com/read/29675025/impact-of-paneth-cell-autophagy-on-inflammatory-bowel-disease
#8
REVIEW
Shu-Ling Wang, Bo-Zong Shao, Sheng-Bing Zhao, Jun Fang, Lun Gu, Chao-Yu Miao, Zhao-Shen Li, Yu Bai
Intestinal mucosal barrier, mainly consisting of the mucus layer and epithelium, functions in absorbing nutrition as well as prevention of the invasion of pathogenic microorganisms. Paneth cell, an important component of mucosal barrier, plays a vital role in maintaining the intestinal homeostasis by producing antimicrobial materials and controlling the host-commensal balance. Current evidence shows that the dysfunction of intestinal mucosal barrier, especially Paneth cell, participates in the onset and progression of inflammatory bowel disease (IBD)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29674826/an-in-vivo-comparison-of-the-antibacterial-efficacy-of-photoactivated-disinfection-diode-laser-and-5-sodium-hypochlorite-in-root-canal-disinfection
#9
Snehal S Sonarkar, Shishir Singh, Rajesh Podar, Gaurav Kulkarni, Rucheet Purba
Background: Pulpal infections are caused by varied number of organisms and are located in various sites of root canal system. Thus, the success of root canal treatment depends on complete eradication of microbiota. Materials and Methods: Thirty-two patients were selected and divided into four groups (photoactivated disinfection [PAD], diode laser, 5% sodium hypochlorite [NaOCl], and normal saline). The treatment was done according to groups, following manufacturer's instructions...
March 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29674267/anti-inflammatory-effect-of-multistrain-probiotic-formulation-l-rhamnosus-b-lactis-and-b-longum
#10
Marzia Sichetti, Stefania De Marco, Rita Pagiotti, Giovanna Traina, Donatella Pietrella
OBJECTIVE: In recent years, a great number of studies have been directed toward the evaluation of gastrointestinal microbiota modulation through the introduction of beneficial microorganisms, also known as probiotics. Many studies have highlighted how this category of bacteria is very important for the good development, functioning, and maintenance of our immune system. There is a delicate balance between the immune system, located under the gut epithelial barrier, and the microbiota, but many factors can induce a disequilibrium that leads to an inflammatory state and dysbiosis...
February 14, 2018: Nutrition
https://www.readbyqxmd.com/read/29674142/usefulness-of-indicator-bacteria-as-potential-marker-of-campylobacter-contamination-in-broiler-carcasses
#11
Anna Roccato, Marzia Mancin, Lisa Barco, Veronica Cibin, Keti Antonello, Francesco Cocola, Antonia Ricci
According to Regulation (EC) No 2017/1495, amending Regulation (EC) No 2073/2005, a slaughterhouse process hygiene criterion based on a limit of 103  CFU/g of Campylobacter for no more than 20 (for the years 2018 and 2019), 15 (for the years 2020-2024) and 10 (starting from 2025) of 50 neck skin samples of broiler carcasses could be an effective measure to reduce the incidence of human campylobacteriosis. In order to stimulate the poultry industry to improve the control of Campylobacter along the slaughter-line, the quantification of indicator bacteria such as Escherichia coli or Enterobacteriaceae could be a useful strategy...
April 4, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29674095/effects-of-tri%C3%AF-uralin-on-the-soil-microbial-community-and-functional-groups-involved-in-nitrogen-cycling
#12
Pengqiang Du, Xiaohu Wu, Jun Xu, Fengshou Dong, Xingang Liu, Yongquan Zheng
Large amounts of trifluralin are applied each year for weed control; however, its effects on soil microbial communities and functions are unknown. Two agricultural soils, one silty loam and one silty clay were spiked with TFL (0, 0.84, 8.4, and 84 mg kg-1 ) and studied the effects using a laboratory microcosm approach. The half-lives were 44.19-61.83 d in all cases. Bacterial abundance increased 1.12-5.56 times by TFL, but the diversity decreased. From the next-generation sequencing results, TFL altered the bacterial community structure, which initially diverged from the control community structure, then recovered, and then diverged again...
April 10, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29673788/quantitative-description-of-respiration-processes-in-meso-eutrophic-and-eutrophic-freshwater-environments
#13
Bartosz Kiersztyn, Elsi S Kauppinen, Tomasz Kaliński, Ryszard Chróst, Waldemar Siuda
We propose a modification of measurement methodology allowing the overall respiration rate (VResp ) close to the in situ conditions; size of the labile, respirable organic matter pool (OMResp ); and its turnover time (Tt) to be calculated. In addition to the respiration of dissolved substrates by free-living bacteria, the respiration of attached bacteria and other planktonic organisms is also taken into account. In case study we evaluated the modified, quantitative description of respiration processes in surface waters of lakes of different trophic status: mezzo-eutrophic and eutrophic...
April 16, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29673188/novel-chlorhexidine-loaded-polymeric-nanoparticles-for-root-canal-treatment
#14
Gina Quiram, Francisco Montagner, Kelli L Palmer, Mihaela C Stefan, Katherine E Washington, Danieli C Rodrigues
Persistence of microorganisms in dentinal tubules after root canal chemo-mechanical preparation has been well documented. The complex anatomy of the root canal and dentinal buffering ability make delivery of antimicrobial agents difficult. This work explores the use of a novel trilayered nanoparticle (TNP) drug delivery system that encapsulates chlorhexidine digluconate, which is aimed at improving the disinfection of the root canal system. Chlorhexidine digluconate was encapsulated inside polymeric self-assembled TNPs...
April 17, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29673162/nanoscale-zinc-oxide-particles-for-improving-the-physiological-and-sanitary-quality-of-a-mexican-landrace-of-red-maize
#15
Juan Estrada-Urbina, Alejandro Cruz-Alonso, Martha Santander-González, Abraham Méndez-Albores, Alma Vázquez-Durán
In this research, quasi-spherical-shaped zinc oxide nanoparticles (ZnO NPs) were synthesized by a simple cost-competitive aqueous precipitation method. The engineered NPs were characterized using several validation methodologies: UV–Vis spectroscopy, diffuse reflection UV–Vis, spectrofluorometry, transmission electron microscopy (TEM), nanoparticle tracking analysis (NTA), and Fourier transform infrared (FTIR) spectroscopy with attenuated total reflection (ATR). A procedure was established to coat a landrace of red maize using gelatinized maize starch...
April 17, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29672773/microbiological-chemical-and-physical-quality-of-drinking-water-for-commercial-turkeys-a-cross-sectional-study
#16
G Di Martino, A Piccirillo, M Giacomelli, D Comin, A Gallina, K Capello, F Buniolo, C Montesissa, L Bonfanti
Drinking water for poultry is not subject to particular microbiological, chemical and physical requirements, thereby representing a potential transmission route for pathogenic microorganisms and contaminants and/or becoming unsuitable for water-administered medications. This study assessed the microbiological, chemical and physical drinking water quality of 28 turkey farms in North-Eastern Italy: 14 supplied with tap water (TW) and 14 with well water (WW). Water salinity, hardness, pH, ammonia, sulphate, phosphate, nitrate, chromium, copper and iron levels were also assessed...
April 17, 2018: Poultry Science
https://www.readbyqxmd.com/read/29672633/design-synthesis-dft-docking-studies-and-adme-prediction-of-some-new-coumarinyl-linked-pyrazolylthiazoles-potential-standalone-or-adjuvant-antimicrobial-agents
#17
Sunil Kumar, Vikram Saini, Indresh K Maurya, Jayant Sindhu, Mukesh Kumari, Ramesh Kataria, Vinod Kumar
The control of antimicrobial resistance (AMR) seems to have come to a dead end. The major consequences of the use and abuse of antibacterial drugs are the development of resistant strains due to genetic mutability of both pathogenic and nonpathogenic microorganisms. We, herein, report the synthesis, characterization and biological activities of coumarin-thiazole-pyrazole (CTP) molecular hybrids with an effort to explore and overcome the increasing antimicrobial resistance. The compounds were characterized by analyzing their IR, Mass, 1H and13C NMR spectral data and elemental analysis...
2018: PloS One
https://www.readbyqxmd.com/read/29672214/use-of-artificial-neuronal-networks-for-prediction-of-the-control-parameters-in-the-process-of-anaerobic-digestion-with-thermal-pretreatment
#18
Rita Flores-Asis, Juan M Méndez-Contreras, Ulises Juárez-Martínez, Alejandro Alvarado-Lassman, Daniel Villanueva-Vásquez, Alberto A Aguilar-Lasserre
This article focuses on the analysis of the behavior patterns of the variables involved in the anaerobic digestion process. The objective is to predict the impact factor and the behavior pattern of the variables, i.e., temperature, pH, volatile solids (VS), total solids, volumetric load, and hydraulic residence time, considering that these are the control variables for the conservation of the different groups of anaerobic microorganisms. To conduct the research, samples of physicochemical sludge were taken from a water treatment plant in a poultry processing factory, and, then, the substrate was characterized, and a thermal pretreatment was used to accelerate the hydrolysis process...
April 19, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29672174/th9-cells-probable-players-in-ulcerative-colitis-pathogenesis
#19
Mojtaba Shohan, Shokrollah Elahi, Hedayatollah Shirzad, Mahmoud Rafieian-Kopaei, Nader Bagheri, Emad Soltani
T lymphocytes represent an important part of adaptive immune system undertaking different functions to regulate immune responses. CD4+ T cells are the most important activator cells in inflammatory conditions. Depending on the type of induced cells and inflamed sites, expression and activity of different subtypes of helper T cells are changed. Recent studies have confirmed the existence of a new subset of helper T lymphocytes called Th9. Naive T cells can differentiate into Th9 subtypes if they are exposed simultaneously by interleukin (IL) 4 and transforming growth factor β and also secondary activation of a complicated network of transcription factors such as interferon regulatory factor 4 (IRF4) and Smads which are essential for adequate induction of this phenotype...
April 19, 2018: International Reviews of Immunology
https://www.readbyqxmd.com/read/29672137/dehydrated-foods-are-they-microbiologically-safe
#20
Bimal Chitrakar, Min Zhang, Benu Adhikari
Dried foods are low water activity foods with water activity ranging from 0.03 to 0.7. They are commonly misconstrued to be inherently safe from food borne pathogenic bacteria. However, there are many reported cases where many food borne illnesses were caused by the consumption of dried foods contaminated with Salmonella spp., Cronobacter spp., Staphylococcus spp. and E. coli. In this work, we have systematically reviewed the literature dealing with the effect of drying/dehydration on the survival of pathogenic microorganisms with special focus on Salmonella spp...
April 19, 2018: Critical Reviews in Food Science and Nutrition
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