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Selective decontamination

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https://www.readbyqxmd.com/read/28894438/characterization-of-enterococcus-isolates-colonizing-the-intestinal-tract-of-intensive-care-unit-patients-receiving-selective-digestive-decontamination
#1
Teresita D J Bello Gonzalez, Phu Pham, Janetta Top, Rob J L Willems, Willem van Schaik, Mark W J van Passel, Hauke Smidt
Enterococci have emerged as important opportunistic pathogens in intensive care units (ICUs). In this study, enterococcal population size and Enterococcus isolates colonizing the intestinal tract of ICU patients receiving Selective Digestive Decontamination (SDD) were investigated. All nine patients included in the study showed substantial shifts in the enterococcal 16S rRNA gene copy number in the gut microbiota during the hospitalization period. Furthermore, 41 Enterococcus spp. strains were isolated and characterized from these patients at different time points during and after ICU hospitalization, including E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28876132/removal-of-escherichia-coli-and-enterococcus-faecalis-after-hand-washing-with-antimicrobial-and-nonantimicrobial-soap-and-persistence-of-these-bacteria-in-rinsates
#2
J Pérez-Garza, S García, N Heredia
Food handlers are important sources of contamination in the agricultural environment. This study was conducted (i) to evaluate the activity of antimicrobial soaps against Escherichia coli and Enterococcus faecalis using a hand washing model with soiled hands and (ii) to determine the survival and persistence of these bacteria in rinsates. Sterilized agricultural soil from tomato and pepper farms was inoculated with E. coli or E. faecalis at 10(3) or 10(6) CFU/g. Decontaminated hands were placed in contact with contaminated soil for 2 min and were then washed with soaps with or without antimicrobial compounds (citric extracts, chloroxylenol, triclosan, or chlorhexidine gluconate)...
September 6, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28870727/selective-digestive-and-oropharyngeal-decontamination-in-medical-and-surgical-icu-patients-an-individual-patient-data-meta-analysis
#3
Nienke L Plantinga, Anne Marie Ga de Smet, Evelien An Oostdijk, Evert de Jonge, Christophe Camus, Wolfgang A Krueger, Dennis Bergmans, Johannes B Reitsma, Marc Jm Bonten
OBJECTIVES: Selective Digestive Decontamination (SDD) and Selective Oropharyngeal Decontamination (SOD) improved ICU, hospital and 28-day survival in Intensive Care Units (ICU) with low levels of antibiotic resistance. Yet, it is unclear whether the effect differs between medical and surgical ICU patients. METHODS: In an individual patient data meta-analysis we systematically searched PubMed and included all randomized controlled studies published since 2000. We performed a two-stage meta-analysis with separate logistic regression models per study and per outcome (hospital survival and ICU survival) and subsequent pooling of main and interaction effects...
September 1, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28865257/highly-efficient-extraction-and-selective-separation-of-uranium-vi-from-transition-metals-using-new-class-of-undiluted-ionic-liquids-based-on-h-phosphonate-anions
#4
Ramzi Zarrougui, Raouf Mdimagh, Nourreddine Raouafi
In this paper, we report the development of an environmental friendly process to decontaminate uranium-containing ores and nuclear wastes by using non-fluorinated ionic liquids (ILs). The main advantages of this extraction process are the absence of any organic diluent and extra extraction agents added to the organic phase. Moreover, the process is cost-effective and maybe applied as a sustainable hydrometallurgical method to recover uranium. The distribution ratio (DU) and the extraction efficiency (%E) of uranium(VI) (UO2(2+)) were found to be dependent on the acidity of the aqueous phase, the extraction time, the alkyl chain length in the ILs, the concentration of the aqueous feed and molar quantity of ILs...
August 25, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28861692/highly-selective-capture-of-phosphate-ions-from-water-by-a-water-stable-metal-organic-framework-modified-with-polyethyleneimine
#5
Hui Qiu, Luyang Yang, Fengling Liu, Yunxia Zhao, LeLe Liu, Jinhong Zhu, Mingxia Song
In this work, a series of polyethyleneimine (PEI) impregnated metal-organic framework (UiO-66) with varying PEI loadings were prepared and applied as sorbents to capture phosphate ions from water. As indicated by SEM and XRD analysis, PEI was dispersed on the outer surface and the inner pores of UiO-66. At 9.45% PEI loadings (UiO-66-3), the saturated adsorption capacity of phosphate reached 73.15 mg P/g at 298 K, which is superior to most sorbents ever reported. UiO-66-3 could sequestrate phosphate over a wide pH range from 2...
August 31, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28853336/the-percutaneous-absorption-of-soman-in-a-damaged-skin-porcine-model-and-the-evaluation-of-woundstat%C3%A2-as-a-topical-decontaminant
#6
Christopher Dalton, Charlotte Hall, Helen Lydon, John Jenner, J Kevin Chipman, John S Graham, Robert P Chilcott
PURPOSE: The aim of this study was to evaluate a candidate haemostat (WoundStat™), down-selected from previous in vitro studies, for efficacy as a potential skin decontaminant against the chemical warfare agent pinacoyl methylfluorophosphonate (Soman, GD) using an in vivo pig model. MATERIALS AND METHODS: An area of approximately 3 cm(2) was dermatomed from the dorsal ear skin to a nominal depth of 100 µm. A discrete droplet of (14)C-GD (300 µg kg(-1)) was applied directly onto the surface of the damaged skin at the centre of the dosing site...
August 30, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/28834769/sodium-copper-hexacyanoferrate-functionalized-magnetic-nanoclusters-for-the-highly-efficient-magnetic-removal-of-radioactive-caesium-from-seawater
#7
Hee-Man Yang, Kyu Sun Hwang, Chan Woo Park, Kune-Woo Lee
Sodium-copper hexacyanoferrate (NaCuHCF)-functionalized magnetic nanoadsorbents were fabricated for the highly efficient magnetic removal of radioactive caesium from seawater. The magnetic nanoclusters (MNCs), composed of many individual Fe3O4 nanoparticles, were covalently coated with polyethyleneimine (PEI) to functionalize the MNC surfaces with NaCuHCF. After simple immobilization of Cu and Na ferrocyanide on the NC surface, the resulting NaCuHCF-functionalized MNCs showed good magnetic properties and a significant adsorption capacity for Cs(+) with a high content of NaCuHCF (36...
August 17, 2017: Water Research
https://www.readbyqxmd.com/read/28817098/estimation-of-the-vertical-distribution-of-radiocesium-in-soil-on-the-basis-of-the-characteristics-of-gamma-ray-spectra-obtained-via-aerial-radiation-monitoring-using-an-unmanned-helicopter
#8
Kotaro Ochi, Miyuki Sasaki, Mutsushi Ishida, Shoichiro Hamamoto, Taku Nishimura, Yukihisa Sanada
After the Fukushima Daiichi Nuclear Power Plant accident, the vertical distribution of radiocesium in soil has been investigated to better understand the behavior of radiocesium in the environment. The typical method used for measuring the vertical distribution of radiocesium is troublesome because it requires collection and measurement of the activity of soil samples. In this study, we established a method of estimating the vertical distribution of radiocesium by focusing on the characteristics of gamma-ray spectra obtained via aerial radiation monitoring using an unmanned helicopter...
August 17, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28804670/synthesis-and-characterization-of-mixed-iron-manganese-oxide-nanoparticles-and-their-application-for-efficient-nickel-ion-removal-from-aqueous-samples
#9
Alessandro Buccolieri, Antonio Serra, Giuseppe Maruccio, Anna Grazia Monteduro, Sanosh Kunjalukkal Padmanabhan, Antonio Licciulli, Valentina Bonfrate, Luca Salvatore, Daniela Manno, Lucio Calcagnile, Gabriele Giancane
Mixed iron-manganese oxide nanoparticles, synthesized by a simple procedure, were used to remove nickel ion from aqueous solutions. Nanostructures, prepared by using different weight percents of manganese, were characterized by transmission electron microscopy, selected area diffraction, X-ray diffraction, Raman spectroscopy, and vibrating sample magnetometry. Adsorption/desorption isotherm curves demonstrated that manganese inclusions enhance the specific surface area three times and the pores volume ten times...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28803549/comparative-gut-microbiota-and-resistome-profiling-of-intensive-care-patients-receiving-selective-digestive-tract-decontamination-and-healthy-subjects
#10
Elena Buelow, Teresita D J Bello González, Susana Fuentes, Wouter A A de Steenhuijsen Piters, Leo Lahti, Jumamurat R Bayjanov, Eline A M Majoor, Johanna C Braat, Maaike S M van Mourik, Evelien A N Oostdijk, Rob J L Willems, Marc J M Bonten, Mark W J van Passel, Hauke Smidt, Willem van Schaik
BACKGROUND: The gut microbiota is a reservoir of opportunistic pathogens that can cause life-threatening infections in critically ill patients during their stay in an intensive care unit (ICU). To suppress gut colonization with opportunistic pathogens, a prophylactic antibiotic regimen, termed "selective decontamination of the digestive tract" (SDD), is used in some countries where it improves clinical outcome in ICU patients. Yet, the impact of ICU hospitalization and SDD on the gut microbiota remains largely unknown...
August 14, 2017: Microbiome
https://www.readbyqxmd.com/read/28797573/digestive-decontamination-in-burn-patients-a-systematic-review-of-randomized-clinical-trials-and-observational-studies
#11
REVIEW
Mercedes Rubio-Regidor, Ana Martín-Pellicer, Luciano Silvestri, Hendrik K F van Saene, José A Lorente, Miguel A de la Cal
OBJECTIVE: The objective of this systematic review is to assess the effect of selective digestive decontamination (SDD) or non-absorbable enteral antibiotics (EA) on mortality, the incidence of infection and its adverse effects in burn patients. MATERIAL AND METHODS: Systematic review of randomized clinical trials (RCT) or observational studies enrolling burn patients, and comparing SDD or EA prophylaxis with placebo or no treatment. The search includes Pubmed/Medline, EMBASE, WOS, Cochrane Library (1970-2015)...
August 7, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28776296/synthesis-of-piperazine-functionalized-magnetic-sporopollenin-a-new-organic-inorganic-hybrid-material-for-the-removal-of-lead-ii-and-arsenic-iii-from-aqueous-solution
#12
Naqhiyah Farhan Ahmad, Muhammad Afzal Kamboh, Hamid Rashidi Nodeh, Siti Nadiah Binti Abd Halim, Sharifah Mohamad
The present work describes the successful functionalization/magnetization of bio-polymeric spores of Lycopodium clavatum (sporopollenin) with 1-(2-hydroxyethyl) piperazine. Analytical techniques, i.e., Fourier transform infrared (FT-IR), field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM), were used to confirm the formation of 1-(2-hydroxyethyl) piperazine-functionalized magnetic sporopollenin (MNPs-Sp-HEP). The proposed adsorbent (MNPs-Sp-HEP) was used for the removal of noxious Pb(II) and As(III) metal ions from aqueous media through a batch-wise method...
August 3, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28772331/-pre-operative-evaluation-of-patients-undergoing-total-joint-arthroplasty-what-is-essential
#13
Holger Haas, Christian D Weber
Background A thorough pre-operative evaluation is required prior to total joint arthroplasty (TJA). The objective of screening is to identify patient- and procedure-related risk constellations. Pre-operative diagnostic measures are vital in order to anticipate, reduce or even eliminate threats to patient safety. Furthermore, the clinical and radiographical workup may confirm the indication and type of surgical procedure, but this is not the subject of this article. Objective An overview of the current literature on pre-operative diagnostic principles is presented...
August 3, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28759469/what-is-new-in-the-prevention-of-nosocomial-pneumonia-in-the-icu
#14
Michael Klompas
PURPOSE OF REVIEW: To summarize and contextualize recent evidence on preventing ventilator-associated pneumonia (VAP). RECENT FINDINGS: Many centers continue to report dramatic decreases in VAP rates after implementing ventilator bundles. Interpreting these reports is complicated, however, by the subjectivity and lack of specificity of VAP definitions. More objective data suggest VAP rates may not have meaningfully changed over the past decade. If so, this compels us to re-examine and revise the prevention bundles we have been using to prevent VAP...
July 29, 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28758285/effect-of-ozone-on-the-microbiological-status-of-five-dried-aromatic-plants
#15
Martha Kazi, Foteini F Parlapani, Ioannis S Boziaris, Evangelos K Vellios, Christos Lykas
BACKGROUND: Aromatic plants may be contaminated with a wide range of microorganisms making them a potential health hazard when infused or added in ready-to-eat meals. To ensure safety, the effect of gaseous ozone treatment on the population of aerobic plate counts (APC), hygienic indicators (Escherichia coli, Enterococcus spp. and Enterobacteriaceae) and fungi was investigated for five dried aromatic plants; i.e. oregano, thyme, mountain tea, lemon verbena and chamomile. Selection, isolation, and further fungi identification were based on the phenotypic and macro and microscopic characteristics...
July 31, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28755553/remediation-of-137-cs-contaminated-concrete-using-electrokinetic-phenomena-and-ionic-salt-washes-in-nuclear-energy-contexts
#16
Andrew J Parker, Malcolm J Joyce, Colin Boxall
This work describes the first known the use of electrokinetic treatments and ionic salt washes to remediate concrete contaminated with (137)Cs. A series of experiments were performed on concrete samples, contaminated with K(+) and (137)Cs, using a bespoke migration cell and an applied electric field (60V potential gradient and current limit of 35mA). Additionally, two samples were treated with an ionic salt wash (≤400molm(-3) of KCl) alongside the electrokinetic treatment. The results show that the combined treatment produces removal efficiencies three times higher (>60%) than the electrokinetic treatment alone and that the decontamination efficiency appears to be proportional to the initial degree of contamination...
July 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28724312/in-vitro-skin-decontamination-of-paraoxon-wet-type-cleansing-effect-of-selected-detergents
#17
Ruzena Pavlikova, Jan Misik, Jiri Cabal, Jan Marek, Kamil Kuca
The aim of this study was to determine optimal conditions for in vitro skin decontamination using water and detergents as decontamination agents and to test the cleansing efficiency of selected detergents. Experiments were performed using a peristaltic pump for showering of pig skin in modified static diffusion cells. Several conditions were tested including different flow rates (from 5 to 33 ml s(-1)), quantity of rinsing fluid (from 40 to 400 ml) and concentration of detergents (2; 5; 10%). Further, several types of detergents/commercial decontamination agents were evaluated under the selected conditions to find the most effective means of decontamination...
August 7, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/28702037/transcriptomic-response-of-purple-willow-salix-purpurea-to-arsenic-stress
#18
Aymeric Yanitch, Nicholas J B Brereton, Emmanuel Gonzalez, Michel Labrecque, Simon Joly, Frederic E Pitre
Arsenic (As) is a toxic element for plants and one of the most common anthropogenic pollutants found at contaminated sites. Despite its severe effects on plant metabolism, several species can accumulate substantial amounts of arsenic and endure the associated stress. However, the genetic mechanisms involved in arsenic tolerance remains obscure in many model plant species used for land decontamination (phytoremediation), including willows. The present study assesses the potential of Salix purpurea cv. 'Fish Creek' for arsenic phytoextraction and reveals the genetic responses behind arsenic tolerance, phytoextraction and metabolism...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28701019/decontamination-of-mikania-glomerata-leaves-by-gamma-irradiation-coumarin-determination-by-hplc-dad-microbiological-control-and-genotoxicological-studies
#19
Marcos Martins Gouvêa, Samara Cristina Ferreira-Machado, Thalita Martins da Silva, Julien Silva Lima Lima, Cláudio Sérgio Corrêa Lau, Luciana Maria Ramires Esper, Samanta Cardozo Mourão, Elizabeth Valverde Macedo, Helio de Carvalho Vital, Edson Ramos Andrade, Annibal Duarte Pereira Netto, Flávia Ferreira de Carvalho Marques, Carlos Augusto de Freitas Peregrino
Gamma irradiation as a decontaminating physical agent could be an important tool in the production chain of herbal medicines by improving the microbiological quality of raw materials and the safety of final products. This study was undertaken to investigate the genotoxic potential and eventual chemical modifications of a batch of Mikania glomerata raw material decontaminated by different doses of gamma irradiation (2.0, 3.5, and 5.0 kGy), using a cesium-137 source. DNA damage was assessed in vitro by agarose gel electrophoresis in regard to double-chain breaks of plasmid pUC 9...
July 12, 2017: Planta Medica
https://www.readbyqxmd.com/read/28675844/treatment-of-radioactive-liquid-effluents-by-reverse-osmosis-membranes-from-lab-scale-to-pilot-scale
#20
Nicolas Combernoux, Luc Schrive, Véronique Labed, Yvan Wyart, Emilie Carretier, Philippe Moulin
The recent use of the reverse osmosis (RO) process at the damaged Fukushima-Daiichi nuclear power plant generated a growing interest in the application of this process for decontamination purposes. This study focused on the development of a robust RO process for decontamination of two kinds of liquid effluents: a contaminated groundwater after a nuclear disaster and a contaminated seawater during a nuclear accident. The SW30 HR membrane was selected among other in this study due to higher retentions (96% for Cs and 98% for Sr) in a true groundwater...
June 24, 2017: Water Research
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