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https://www.readbyqxmd.com/read/28930183/substituting-sodium-hydrosulfite-with-sodium-metabisulfite-improves-long-term-stability-of-a-distributable-paper-based-test-kit-for-point-of-care-screening-for-sickle-cell-anemia
#1
Kian Torabian, Dalia Lezzar, Nathaniel Z Piety, Alex George, Sergey S Shevkoplyas
Sickle cell anemia (SCA) is a genetic blood disorder that is particularly lethal in early childhood. Universal newborn screening programs and subsequent early treatment are known to drastically reduce under-five SCA mortality. However, in resource-limited settings, cost and infrastructure constraints limit the effectiveness of laboratory-based SCA screening programs. To address this limitation our laboratory previously developed a low-cost, equipment-free, point-of-care, paper-based SCA test. Here, we improved the stability and performance of the test by replacing sodium hydrosulfite (HS), a key reducing agent in the hemoglobin solubility buffer which is not stable in aqueous solutions, with sodium metabisulfite (MS)...
September 20, 2017: Biosensors
https://www.readbyqxmd.com/read/28930007/economic-assessment-of-waterborne-outbreak-of-cryptosporidiosis
#2
Aksana Chyzheuskaya, Martin Cormican, Raghavendra Srivinas, Diarmuid O'Donovan, Martina Prendergast, Cathal O'Donoghue, Dearbháile Morris
In 2007, a waterborne outbreak of Cryptosporidium hominis infection occurred in western Ireland, resulting in 242 laboratory-confirmed cases and an uncertain number of unconfirmed cases. A boil water notice was in place for 158 days that affected 120,432 persons residing in the area, businesses, visitors, and commuters. This outbreak represented the largest outbreak of cryptosporidiosis in Ireland. The purpose of this study was to evaluate the cost of this outbreak. We adopted a societal perspective in estimating costs associated with the outbreak...
October 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28929960/-antimicrobial-susceptibilities-and-molecular-characterization-of-toxin-positive-clostridium-difficile-isolates-the-first-report-on-the-presence-of-hypervirulent-strains-from-turkey
#3
Emrah Salman, Belkıs Levent, Zeynep Ceren Karahan
Clostridium difficile infection is one of the most important hospital-acquired infections. Infections caused by hypervirulent C.difficile strains which produce toxins at high levels, have higher morbidity and mortality rates, more complications and relapses. They are characterized by higher sporulation ratios and resistance rates for fluoroquinolones. In order to prevent serious morbidities, mortalities and remarkable increase in health costs, highly pathogenic C.difficile strains must be identified before causing severe outbreaks...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28929945/innovative-pcr-without-dna-extraction-for-african-sickle-cell-disease-diagnosis
#4
L Detemmerman, S Olivier, V Bours, F Boemer
OBJECTIVES: Hemoglobin (Hb) disorders consist of thalassemia and Hb structural variants, of which the major forms are associated with severe anemia and/or vascular occlusion. Current diagnostic techniques are highly accurate and mostly based on isoelectric focusing, high-performance liquid chromatography or mass spectrometry, which often require advanced laboratory equipment. In sub-Saharan Africa, the Hb disorders are mainly associated to the pathological variants hemoglobin S (HbS) and HbC...
September 20, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28929680/-relationship-between-seedling-grade-of-codonopsis-pilosula-and-yield-and-quality-of-medicinal-materials
#5
Hui-Zhen Wang, Zhong-Xue Lian, Guo-di Lu, Yu-Fang Huang, Zhi-Jia Cui, Jin-Tian Li, Tao Du
The study is aimed to research the relationship between the seedling grade of Codonopsis pilosula and yield and quality of medicinal materials, so as to provide basis for establishing seedling standard. Thirty seedlings of C. pilosula were collected from the main production areas in Gansu province, such as Weiyuan, Minxian, Zhangxian, Dangchang and Longxi, root length and diameter and weight of all the samples were measured. According to the clustering results, seedlings were divided into 3 levels, and field experiments were conducted with three levels seedling, yield and quality were tested in laboratory...
November 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28927987/industry-perspective-on-contemporary-protein-binding-methodologies-considerations-for-regulatory-drug-drug-interaction-and-related-guidelines-on-highly-bound-drugs
#6
REVIEW
Li Di, Christopher Breen, Rob Chambers, Sean T Eckley, Robert Fricke, Avijit Ghosh, Paul Harradine, J Cory Kalvass, Stacy Ho, Caroline A Lee, Punit Marathe, Everett J Perkins, Mark Qian, Susanna Tse, Zhengyin Yan, Maciej J Zamek-Gliszczynski
Regulatory agencies have recently issued drug-drug interaction (DDI) guidelines, which require determination of plasma protein binding (PPB). To err on the conservative side, the agencies recommend that a 0.01 lower limit of fraction unbound (fu) be used for highly bound compounds (>99%), irrespective of the actual measured values. While this may avoid false negatives, the recommendation would likely result in a high rate of false positive predictions, resulting in unnecessary clinical studies and more stringent inclusion/exclusion criteria, which may add cost and time in delivery of new medicines to patients...
September 16, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28927484/validation-of-telephone-based-behavioral-assessments-in-aging-services-clients
#7
Yeates Conwell, Adam Simning, Nicole Driffill, Yinglin Xia, Xin Tu, Susan P Messing, David Oslin
BACKGROUND: The Behavioral Health Laboratory (BHL), a telephone-based mental health assessment, is a cost-effective approach that can improve mental illness identification and management. The individual BHL instruments, which were originally designed to be administered in-person, have not yet been validated with an in-person BHL assessment. This study therefore aims to characterize the concordance between the BHL data gathered by telephone and in-person interviews. METHODS: A cross-sectional study was conducted with English-speaking aging services network (ASN) clients aged 60 years and older in Monroe County, NY who were randomized to a BHL interview either in-person (n = 55) or by telephone (n = 53)...
September 20, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28925968/recent-progress-in-the-development-of-diagnostic-tests-for-malaria
#8
REVIEW
Francis D Krampa, Yaw Aniweh, Gordon A Awandare, Prosper Kanyong
The impact of malaria on global health has continually prompted the need to develop effective diagnostic strategies. In malaria endemic regions, routine diagnosis is hampered by technical and infrastructural challenges to laboratories. These laboratories lack standard facilities, expertise or diagnostic supplies; thus, therapy is administered based on clinical or self-diagnosis. There is the need for accurate diagnosis of malaria due to the continuous increase in the cost of medication, and the emergence and spread of drug resistant strains...
September 19, 2017: Diagnostics
https://www.readbyqxmd.com/read/28923723/efficacy-and-field-applicability-of-burmese-grape-leaf-extract-bgle-for-cadmium-removal-an-implication-of-metal-removal-from-natural-water
#9
Rinkumoni Borah, Deepa Kumari, Anindita Gogoi, Sunayana Biswas, Ritusmita Goswami, Jaehong Shim, Naznin Ara Begum, Manish Kumar
Burmese Grape Leaf Extract (BGLE), a low cost adsorbent was studied for cadmium (Cd(II)) removal from metal solutions and natural water samples. Batch adsorption studies were carried out to examine the influence of contact time and initial metal concentration after characterization under scanning electron microscopy (SEM). Cd(II)adsorptiononto BGLE was best explained by pseudo-second order kinetics (R(2) = 0.99) and best fitted with Langmuir isotherm model (R(2) = 0.76). Beside the selective adsorption activity of BGLE towards Cd(II), only 0...
September 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28922054/economic-burden-of-pneumococcal-infections-in-children-under-5%C3%A2-years-of-age
#10
Mehmet Ceyhan, Yasemin Ozsurekci, Kubra Aykac, Basak Hacibedel, Egemen Ozbilgili
The present study aimed to determine the cost of childhood pneumococcal infections under 5 years of age and to provide further data for future health economy studies. Electronic medical records of children diagnosed with meningitis caused by S. pneumoniae and all-cause pneumonia, and acute otitis media (AOM) between January 2013-April 2014 were retrospectively evaluated. Direct costs for the treatments of hospitalized patients (pneumonia and pneumococcal meningitis) including costs of healthcare services consisted of costs of hospital bed, examination, laboratory analyses, scanning methods, consultation, vascular access procedures, and infusion and intravenous treatments...
September 18, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28920678/facing-challenges-in-real-life-application-of-surface-enhanced-raman-scattering-sers-design-and-nanofabrication-of-sers-substrates-for-rapid-field-test-of-food-contaminants
#11
Ruyi Shi, Xiangjiang Liu, Yibin Ying
Surface-enhanced Raman scattering (SERS) is capable of detecting single molecule with high specificity and has become a promising technique for rapid chemical analysis of agricultural products and foods. With a deeper understanding of the SERS effect and advances in nanofabrication technology, SERS is now on the edge of going out of the laboratory and becoming a sophisticated analytical tool to fulfill various real-world tasks. This review focuses on the challenges that SERS has met in this progress, such as how to obtain a reliable SERS signal, improve the sensitivity and specificity in a complex sample matrix, develop simple and user-friendly practical sensing approach, reduce the running cost, etc...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28918534/do-surgical-helmet-systems-affect-intraoperative-wound-contamination-a-randomised-controlled-trial
#12
Otis C Shirley, Ali Bayan, Mark Zhu, James P Dalton, Siouxsie Wiles, Simon W Young
BACKGROUND: Deep infection following arthroplasty remains a devastating complication. Some registry data suggests that modern positive-pressure surgical helmet systems (SHS) are associated with a paradoxical increase in infection rates, and as such their role in arthroplasty remains unclear. The aim of this study was to investigate whether SHS increase wound contamination in total knee arthroplasty (TKA) and if this contamination can be reduced by placing tape around the gown/glove interface...
September 16, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28918434/improved-dna-purification-with-quality-assurance-for-evaluation-of-the-microbial-genetic-content-of-constructed-wetlands
#13
Wenda Huang, Jingjing Guo, Ran Tao, Ying Man, Yunv Dai, Yang Yang
Efficient isolation of target DNA is a crucial first step of DNA-based metagenomic analyses of environmental samples. Insufficient quantity and purity of DNA isolated using commercial kits result in missing genetic information, especially for large-diameter substrates in constructed wetlands (CWs). Here, we addressed this problem by devising a cost-effective calcium chloride lysozyme-sodium dodecyl sulfate (SDS) method (CCLS), with key improvements in the steps of humic acid removal and cell lysis. The buffer comprising Tris, EDTA, Na2O2P7 and PVPP (TENP), and skim milk, could reduce adsorption between microorganisms and substrates, and calcium chloride precipitated and removed over 94% of humic acid...
September 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28917802/on-chip-microfluidic-generation-of-monodisperse-bubbles-for-liquid-interfacial-tension-measurement
#14
Chen Wang, Jing Cao, Yue Zhou, Xing-Hua Xia
A novel microfluidic method for measuring liquid interfacial tension using monodisperse microbubbles generated in situ has been proposed. Instead of bulky gas supply used in traditional microfluidic devices, microbubbles are efficiently generated via water electrolysis in the devices. Since the bubble formation frequency is related to the interfacial tension of liquids used, thus, precisely measuring the interfacial tension of liquids in microfluidics can be achieved. In addition, it is found that during the microbubble formation, the electrochemical potential fluctuates regularly at controlled electrolysis current, and the fluctuating period depends on the microbubble generation rate...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915346/a-review-of-chemical-spot-tests-a-presumptive-illicit-drug-identification-technique
#15
REVIEW
Morgan Philp, Shanlin Fu
Chemical 'spot' tests are a presumptive illicit drug identification technique commonly used by law enforcement, border security personnel, and forensic laboratories. The simplicity, low cost and rapid results afforded by these tests make them particularly attractive for presumptive identification globally. In this paper, we review the development of these long-established methods and discuss color test recommendations and guidelines. A search of the scientific literature revealed the chemical reactions occurring in many color tests are either not actively investigated or reported as unknown...
September 15, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28914278/magnitude-of-potentially-inappropriate-thrombophilia-testing-in-the-inpatient-hospital-setting
#16
Eric Mou, Henry Kwang, Jason Hom, Lisa Shieh, Andre Kumar, Ilana Richman, Caroline Berube
Laboratory costs of thrombophilia testing exceed an estimated $650 million (in US dollars) annually. Quantifying the prevalence and financial impact of potentially inappropriate testing in the inpatient hospital setting represents an integral component of the effort to reduce healthcare expenditures. We conducted a retrospective analysis of our electronic medical record to evaluate 2 years' worth of inpatient thrombophilia testing measured against preformulated appropriateness criteria. Cost data were obtained from the Centers for Medicare and Medicaid Services 2016 Clinical Laboratory Fee Schedule...
September 2017: Journal of Hospital Medicine: An Official Publication of the Society of Hospital Medicine
https://www.readbyqxmd.com/read/28910830/consensus-guidelines-for-therapeutic-drug-monitoring-in-neuropsychopharmacology-update-2017
#17
C Hiemke, N Bergemann, H W Clement, A Conca, J Deckert, K Domschke, G Eckermann, K Egberts, M Gerlach, C Greiner, G Gründer, E Haen, U Havemann-Reinecke, G Hefner, R Helmer, G Janssen, E Jaquenoud, G Laux, T Messer, R Mössner, M J Müller, M Paulzen, B Pfuhlmann, P Riederer, A Saria, B Schoppek, G Schoretsanitis, M Schwarz, M Silva Gracia, B Stegmann, W Steimer, J C Stingl, M Uhr, S Ulrich, S Unterecker, R Waschgler, G Zernig, G Zurek, P Baumann
Therapeutic drug monitoring (TDM) is the quantification and interpretation of drug concentrations in blood to optimize pharmacotherapy. It considers the interindividual variability of pharmacokinetics and thus enables personalized pharmacotherapy. In psychiatry and neurology, patient populations that may particularly benefit from TDM are children and adolescents, pregnant women, elderly patients, individuals with intellectual disabilities, patients with substance abuse disorders, forensic psychiatric patients or patients with known or suspected pharmacokinetic abnormalities...
September 14, 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28910351/lab-meets-real-life-a-laboratory-assessment-of-spontaneous-thought-and-its-ecological-validity
#18
Christine Kuehner, Annett Welz, Iris Reinhard, Georg W Alpers
People's minds frequently wander towards self-generated thoughts, which are unrelated to external stimuli or demands. These phenomena, referred to as "spontaneous thought" (ST) and "mind wandering" (MW), have previously been linked with both costs and benefits. Current assessments of ST and MW have predominantly been conducted in the laboratory, whereas studies on the ecological validity of such lab-related constructs and their interrelations are rare. The current study examined the stability of ST dimensions assessed in the lab and their predictive value with respect to MW, repetitive negative thought (uncontrollable rumination, RUM), and affect in daily life...
2017: PloS One
https://www.readbyqxmd.com/read/28910306/a-quantitative-systems-pharmacology-approach-incorporating-a-novel-liver-model-for-predicting-pharmacokinetic-drug-drug-interactions
#19
Mohammed H Cherkaoui-Rbati, Stuart W Paine, Peter Littlewood, Cyril Rauch
All pharmaceutical companies are required to assess pharmacokinetic drug-drug interactions (DDIs) of new chemical entities (NCEs) and mathematical prediction helps to select the best NCE candidate with regard to adverse effects resulting from a DDI before any costly clinical studies. Most current models assume that the liver is a homogeneous organ where the majority of the metabolism occurs. However, the circulatory system of the liver has a complex hierarchical geometry which distributes xenobiotics throughout the organ...
2017: PloS One
https://www.readbyqxmd.com/read/28906279/the-value-of-point-of-care-cd4-and-laboratory-viral-load-in-tailoring-antiretroviral-therapy-monitoring-strategies-to-resource-limitations
#20
Emily P Hyle, Ilesh V Jani, Katherine L Rosettie, Robin Wood, Benjamin Osher, Stephen Resch, Pamela P Pei, Paolo Maggiore, Kenneth A Freedberg, Trevor Peter, Robert A Parker, Rochelle P Walensky
OBJECTIVE: To examine the clinical and economic value of point-of-care CD4 (POC-CD4) or viral load monitoring compared with current practices in Mozambique, a country representative of the diverse resource limitations encountered by HIV treatment programs in sub-Saharan Africa. DESIGN/METHODS: We use the Cost-Effectiveness of Preventing AIDS Complications-International model to examine the clinical impact, cost (2014 US$), and incremental cost-effectiveness ratio [$/year of life saved (YLS)] of ART monitoring strategies in Mozambique...
September 24, 2017: AIDS
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