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https://www.readbyqxmd.com/read/29161268/nucleic-acid-purification-from-plants-animals-and-microbes-in-under-30-seconds
#1
Yiping Zou, Michael Glenn Mason, Yuling Wang, Eugene Wee, Conny Turni, Patrick J Blackall, Matt Trau, Jose Ramon Botella
Nucleic acid amplification is a powerful molecular biology tool, although its use outside the modern laboratory environment is limited due to the relatively cumbersome methods required to extract nucleic acids from biological samples. To address this issue, we investigated a variety of materials for their suitability for nucleic acid capture and purification. We report here that untreated cellulose-based paper can rapidly capture nucleic acids within seconds and retain them during a single washing step, while contaminants present in complex biological samples are quickly removed...
November 2017: PLoS Biology
https://www.readbyqxmd.com/read/29160384/current-use-and-acceptability-of-novel-diagnostic-tests-for-active-tuberculosis-a-worldwide-survey
#2
Massimo Amicosante, Lia D'Ambrosio, Marcela Munoz, Fernanda Carvalho de Queiroz Mello, Marc Tebruegge, Novel Njweipi Chegou, Fouad Seghrouchni, Rosella Centis, Delia Goletti, Graham Bothamley, Giovanni Battista Migliori
OBJECTIVE: To determine the current use and potential acceptance (by tuberculosis experts worldwide) of novel rapid tests for the diagnosis of tuberculosis that are in line with World Health Organization target product profiles. METHODS: A multilingual survey was disseminated online between July and November of 2016. RESULTS: A total of 723 individuals from 114 countries responded to the survey. Smear microscopy was the most commonly used rapid tuberculosis test (available to 90...
September 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/29143672/diagnostic-accuracy-of-serological-diagnosis-of-hepatitis-c-and-b-using-dried-blood-spot-samples-dbs-two-systematic-reviews-and-meta-analyses
#3
Berit Lange, Jennifer Cohn, Teri Roberts, Johannes Camp, Jeanne Chauffour, Nina Gummadi, Azumi Ishizaki, Anupriya Nagarathnam, Edouard Tuaillon, Philippe van de Perre, Christine Pichler, Philippa Easterbrook, Claudia M Denkinger
BACKGROUND: Dried blood spots (DBS) are a convenient tool to enable diagnostic testing for viral diseases due to transport, handling and logistical advantages over conventional venous blood sampling. A better understanding of the performance of serological testing for hepatitis C (HCV) and hepatitis B virus (HBV) from DBS is important to enable more widespread use of this sampling approach in resource limited settings, and to inform the 2017 World Health Organization (WHO) guidance on testing for HBV/HCV...
November 1, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29143619/diagnostic-accuracy-of-tests-to-detect-hepatitis-b-surface-antigen-a-systematic-review-of-the-literature-and-meta-analysis
#4
Ali Amini, Olivia Varsaneux, Helen Kelly, Weiming Tang, Wen Chen, Debrah I Boeras, Jane Falconer, Joseph D Tucker, Roger Chou, Azumi Ishizaki, Philippa Easterbrook, Rosanna W Peeling
BACKGROUND: Chronic Hepatitis B Virus (HBV) infection is characterised by the persistence of hepatitis B surface antigen (HBsAg). Expanding HBV diagnosis and treatment programmes into low resource settings will require high quality but inexpensive rapid diagnostic tests (RDTs) in addition to laboratory-based enzyme immunoassays (EIAs) to detect HBsAg. The purpose of this review is to assess the clinical accuracy of available diagnostic tests to detect HBsAg to inform recommendations on testing strategies in 2017 WHO hepatitis testing guidelines...
November 1, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29143616/diagnostic-accuracy-of-detection-and-quantification-of-hbv-dna-and-hcv-rna-using-dried-blood-spot-dbs-samples-a-systematic-review-and-meta-analysis
#5
Berit Lange, Teri Roberts, Jennifer Cohn, Jamie Greenman, Johannes Camp, Azumi Ishizaki, Luke Messac, Edouard Tuaillon, Philippe van de Perre, Christine Pichler, Claudia M Denkinger, Philippa Easterbrook
BACKGROUND: The detection and quantification of hepatitis B (HBV) DNA and hepatitis C (HCV) RNA in whole blood collected on dried blood spots (DBS) may facilitate access to diagnosis and treatment of HBV and HCV infection in resource-poor settings. We evaluated the diagnostic performance of DBS compared to venous blood samples for detection and quantification of HBV-DNA and HCV-RNA in two systematic reviews and meta-analyses on the diagnostic accuracy of HBV DNA and HCV RNA from DBS compared to venous blood samples...
November 1, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29143612/values-preferences-and-current-hepatitis-b-and-c-testing-practices-in-low-and-middle-income-countries-results-of-a-survey-of-end-users-and-implementers
#6
Elena Ivanova Reipold, Alessandra Trianni, Douglas Krakower, Stefano Ongarello, Teri Roberts, Philippa Easterbrook, Claudia Denkinger
BACKGROUND: Access to hepatitis B virus (HBV) and hepatitis C virus (HCV) diagnostics remains a key bottleneck in scale-up of access to HBV and HCV treatment, particularly in low- and middle-income countries (LMICs) that lack laboratory resources and skilled personnel. To inform the development of World Health Organization (WHO) testing guidelines on who to test and how to test, we performed a "values and preferences" survey of end users and implementers of hepatitis testing in LMICs on current hepatitis B and C testing practices and acceptability of diagnostic approaches, as well as preferences for the future...
November 1, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29142958/diagnostic-performance-of-a-saliva-urea-nitrogen-dipstick-to-detect-kidney-disease-in-malawi
#7
Rhys Evans, Viviane Calice-Silva, Jochen G Raimann, Ulla Hemmila, Alison Craik, Mwayi Mtekateka, Fergus Hamilton, Zuze Kawale, Hamish Dobbie, Gavin Dreyer, Nathan Levin, Peter Kotanko, Roberto Pecoits-Filho
Introduction: Kidney disease (KD), including acute kidney injury, is common, severe and leads to significant mortality in the developing world. However, simple tools to facilitate diagnosis and guide treatment are lacking. We studied the diagnostic performance of saliva urea nitrogen (SUN) measured by dipstick to diagnose KD in a low-resource setting. Methods: Medical admissions to a tertiary hospital in Malawi had serum creatinine tested at presentation; SUN was measured using a dipstick...
March 2017: KI Reports
https://www.readbyqxmd.com/read/29135224/radiation-responsive-esculin-derived-molecular-gels-as-signal-enhancers-for-optical-imaging
#8
Julian R Silverman, Qize Zhang, Nabendu B Pramanik, Malick Samateh, Travis M Shaffer, Sai Sateesh Sagiri, Jan Grimm, George John
Recent interest in detecting visible photons that emanate from interactions of ionizing radiation with matter have spurred the development of multifunctional materials that amplify this optical signal from radiotracers. Tailored stimuli-responsive systems may be paired with diagnostic radionuclides to improving surgical guidance and aid in detecting therapeutic radionuclides otherwise difficult to image with conventional nuclear medicine approaches. Since light emanating from these interactions is typically low in intensity and blue-weighted (i...
November 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29134742/innovative-technologies-for-point-of-care-testing-of-viral-hepatitis%C3%A2-in-low-resource-and-decentralized-settings
#9
Léa Duchesne, Karine Lacombe
According to the Global Burden of Diseases, chronic viral hepatitis B and C are one of the most challenging global health conditions that rank among the first causes of morbidity and mortality worldwide. Low and middle income countries are particularly affected by the health burden associated with HBV or HCV infection. One major gap in efficiently addressing the issue of viral hepatitis is universal screening. However, the costs and chronic lack of human resources for using traditional screening strategies based on serology and molecular biology preclude any scaling-up...
November 13, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29132613/identification-and-management-of-shigella-infection-in-children-with-diarrhoea-a-systematic-review-and-meta-analysis
#10
Kirkby D Tickell, Rebecca L Brander, Hannah E Atlas, Jeffrey M Pernica, Judd L Walson, Patricia B Pavlinac
BACKGROUND: Shigella infections are a leading cause of diarrhoeal death among children in low-income and middle-income countries. WHO guidelines reserve antibiotics for treating children with dysentery. Reliance on dysentery for identification and management of Shigella infection might miss an opportunity to reduce Shigella-associated morbidity and mortality. We aimed to systematically review and evaluate Shigella-associated and dysentery-associated mortality, the diagnostic value of dysentery for the identification of Shigella infection, and the efficacy of antibiotics for children with Shigella or dysentery, or both...
December 2017: Lancet Global Health
https://www.readbyqxmd.com/read/29131859/development-and-validation-of-an-immunoperoxidase-antigen-detection-test-for-improved-diagnosis-of-rabies-in-indonesia
#11
Ibnu Rahmadane, Andrea F Certoma, Grantley R Peck, Yul Fitria, Jean Payne, Axel Colling, Brian J Shiell, Gary Beddome, Susanne Wilson, Meng Yu, Chris Morrissy, Wojtek P Michalski, John Bingham, Ian A Gardner, John D Allen
Rabies continues to pose a significant threat to human and animal health in regions of Indonesia. Indonesia has an extensive network of veterinary diagnostic laboratories and the 8 National laboratories are equipped to undertake diagnostic testing for rabies using the commercially-procured direct fluorescent antibody test (FAT), which is considered the reference (gold standard) test. However, many of the Indonesian Provincial diagnostic laboratories do not have a fluorescence microscope required to undertake the FAT...
November 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29130601/scaling-up-hiv-viral-load-lessons-from-the-large-scale-implementation-of-hiv-early-infant-diagnosis-and-cd4-testing
#12
Trevor Peter, Clement Zeh, Zachary Katz, Ali Elbireer, Bereket Alemayehu, Lara Vojnov, Alex Costa, Naoko Doi, Ilesh Jani
INTRODUCTION: The scale-up of effective HIV viral load (VL) testing is an urgent public health priority. Implementation of testing is supported by the availability of accurate, nucleic acid based laboratory and point-of-care (POC) VL technologies and strong WHO guidance recommending routine testing to identify treatment failure. However, test implementation faces challenges related to the developing health systems in many low-resource countries. The purpose of this commentary is to review the challenges and solutions from the large-scale implementation of other diagnostic tests, namely nucleic-acid based early infant HIV diagnosis (EID) and CD4 testing, and identify key lessons to inform the scale-up of VL...
November 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/29122932/diagnostic-performance-of-an-acoustic-based-system-for-coronary-artery-disease-risk-stratification
#13
Simon Winther, Louise Nissen, Samuel Emil Schmidt, Jelmer Sybren Westra, Laust Dupont Rasmussen, Lars Lyhne Knudsen, Lene Helleskov Madsen, Jane Kirk Johansen, Bjarke Skogstad Larsen, Johannes Jan Struijk, Lars Frost, Niels Ramsing Holm, Evald Høj Christiansen, Hans Erik Botker, Morten Bøttcher
OBJECTIVE: Diagnosing coronary artery disease (CAD) continues to require substantial healthcare resources. Acoustic analysis of transcutaneous heart sounds of cardiac movement and intracoronary turbulence due to obstructive coronary disease could potentially change this. The aim of this study was thus to test the diagnostic accuracy of a new portable acoustic device for detection of CAD. METHODS: We included 1675 patients consecutively with low to intermediate likelihood of CAD who had been referred for cardiac CT angiography...
November 9, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29121922/assisting-differential-clinical-diagnosis-of-cattle-diseases-using-smartphone-based-technology-in-low-resource-settings-a-pilot-study
#14
Tariku Jibat Beyene, Amanuel Eshetu, Amina Abdu, Etenesh Wondimu, Ashenafi Feyisa Beyi, Takele Beyene Tufa, Sami Ibrahim, Crawford W Revie
BACKGROUND: The recent rise in mobile phone use and increased signal coverage has created opportunities for growth of the mobile Health sector in many low resource settings. This pilot study explores the use of a smartphone-based application, VetAfrica-Ethiopia, in assisting diagnosis of cattle diseases. We used a modified Delphi protocol to select important diseases and Bayesian algorithms to estimate the related disease probabilities based on various clinical signs being present in Ethiopian cattle...
November 9, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29120320/adapting-maternal-health-practice-to-co-morbidities-and-social-inequality-a-systematic-approach
#15
Aditi Iyer, V Srinidhi, Anuradha Sreevathsa, Gita Sen
The process of adapting universal guidelines to local institutional and cultural settings is recognized as important to their implementation and uptake. However, clarity on what, why and how to adapt in an evidence-based manner is still somewhat elusive. Health providers in low and middle income country contexts often have to deal with widely present co-morbidities and social inequalities among pregnant women. Since neither of these problems finds adequate discussion within the usual guidelines, and given the continual pressures posed by resource scarcity, health providers respond through ad hoc adaptations inimical to maternal safety and equity...
November 9, 2017: Canadian Journal of Public Health. Revue Canadienne de Santé Publique
https://www.readbyqxmd.com/read/29119348/implementing-evidence-based-practices-for-acute-stroke-care-in-low-and-middle-income-countries
#16
REVIEW
Rasha Khatib, Assef M Jawaada, Yurany A Arevalo, Hiba K Hamed, Sukayna H Mohammed, Mark D Huffman
PURPOSE OF REVIEW: Most strokes occur in low- and middle-income countries where resources to manage patients are limited. We explore the resources required to providing optimal acute stroke care and review barriers to implementing evidence-based stroke care in settings with limited resources using the World Stroke Organization's Global Stroke Services Action Plan framework. RECENT FINDINGS: Major advances have been made during the past few decades in stroke prevention, treatment, and rehabilitation...
November 8, 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29115991/evaluation-of-the-deki-reader%C3%A2-an-automated-rdt-reader-and-data-management-device-in-a-household-survey-setting-in-low-malaria-endemic-southwestern-uganda
#17
Caesar Oyet, Michelle E Roh, Gertrude N Kiwanuka, Patrick Orikiriza, Martina Wade, Sunil Parikh, Juliet Mwanga-Amumpaire, Yap Boum
BACKGROUND: Early diagnosis of suspected malaria cases with a rapid diagnostic test (RDT) has been shown to be an effective malaria control tool used in many resource-constrained settings. However, poor quality control and quality assurance hinder the accurate reporting of malaria diagnoses. Recent use of a portable, battery operated RDT reader (Deki Reader™, Fio Corporation) has shown to have high agreement with visual inspection across diverse health centre settings, however evidence of its feasibility and usability during cross sectional surveys are limited...
November 7, 2017: Malaria Journal
https://www.readbyqxmd.com/read/29112844/polycyclic-aromatic-hydrocarbons-in-house-dust-and-surface-soil-in-major-urban-regions-of-nepal-implication-on-source-apportionment-and-toxicological-effect
#18
Ishwar Chandra Yadav, Ningombam Linthoingambi Devi, Jun Li, Gan Zhang
Urban centers have turned to be the provincial store for resource consumptions and source releases of different types of semi-volatile organic compounds (SVOCs) including polycyclic aromatic hydrocarbons (PAHs), bringing about boundless environmental pollutions, among different issues. Human prosperity inside urban communities is unambiguously dependent on the status of urban soils and house dusts. However, environmental occurrence and sources of release of these SVOCs are challenging in Nepalese cities, as exceptionally very limited data are accessible...
November 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29104709/paper-based-assays-for-urine-analysis
#19
REVIEW
Eric Lepowsky, Fariba Ghaderinezhad, Stephanie Knowlton, Savas Tasoglu
A transformation of the healthcare industry is necessary and imminent: hospital-centered, reactive care will soon give way to proactive, person-centered care which focuses on individuals' well-being. However, this transition will only be made possible through scientific innovation. Next-generation technologies will be the key to developing affordable and accessible care, while also lowering the costs of healthcare. A promising solution to this challenge is low-cost continuous health monitoring; this approach allows for effective screening, analysis, and diagnosis and facilitates proactive medical intervention...
September 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/29100545/a-systematic-review-and-diagnostic-test-accuracy-meta-analysis-of-the-validity-of-anion-gap-as-a-screening-tool-for-hyperlactatemia
#20
Stella Andrea Glasmacher, William Stones
OBJECTIVE: This systematic review and meta-analysis seeks to determine the validity of the anion gap to screen for hyperlactatemia in critically ill patients. We have previously shown that the anion gap does not predict 31-day and in-hospital mortality in critically ill patients. The present review aims to add confirmatory evidence to identify whether the anion gap is a suitable tool for risk stratification in low-resource countries. RESULTS: Nine studies reporting on 4504 samples from 2111 patients were included...
November 3, 2017: BMC Research Notes
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