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https://www.readbyqxmd.com/read/28109682/label-free-checkerboard-assay-to-determine-overlapping-epitopes-of-ebola-virus-vp-40-antibodies-using-surface-plasmon-resonance
#1
George P Anderson, Jinny L Liu, Dan Zabetakis, Patricia M Legler, Ellen R Goldman
Immunoassay formats, in which antibodies provide sensitivity and specificity, are often utilized to provide rapid and simple diagnostic tests. Surface plasmon resonance is frequently used to evaluate the suitability of antibodies by determining binding kinetics to agents or surrogate antigens. We used SPR to evaluate a number of commercial monoclonal antibodies as well as single domain antibodies produced in-house. All the antibodies targeted the Ebola virus viral protein 40 (VP40). We determined the ability of each antibody to bind to immobilized VP40, and ensured they did not bind Ebola glycoprotein or the nucleoprotein...
January 18, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28057165/current-and-future-diagnostic-tests-for-ebola-virus-disease
#2
Bharti Singh, Advaita Ganguly, Hoon H Sunwoo
Ebola virus disease (EVD) is a major public health concern with a high mortality rate in infected individuals. Outbreaks of Ebola have been widespread-there is no rapid, sensitive, specific, and affordable diagnostic test for the virus, nor there is any treatment for the disease. Overlapping symptoms of other endemic diseases, such as malaria and cholera, make it difficult to diagnose EVD. For clinical management, outbreak investigation, and proper surveillance, EVD requires a detection system, which should be fast, sensitive, specific, efficient, affordable, and user-friendly with in-country staff...
October 2016: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28050868/field-assessment-of-the-new-rapid-diagnostic-test-ebola-ezyscreen-%C3%A2
#3
F Gallais, F Gay-Andrieu, V Picot, N Magassouba, S Mély, C N Peyrefitte, L Bellanger
During the Ebola virus disease outbreak in West Africa in 2014, the World Health Organization has pointed out the need for rapid diagnostic tests (RDT) affordable, sensitive, specific, user-friendly, rapid, equipment-free, and deliverable. The rapid diagnostic test (Lateral Flow Assay) Ebola eZYSCREEN(®) was developed in this emergency frame using monoclonal antibodies against the envelope glycoprotein of the virus. Two distinct versions have been industrialized, one for whole-blood samples and the other for serum/plasma samples...
January 3, 2017: Bulletin de la Société de Pathologie Exotique
https://www.readbyqxmd.com/read/28034593/one-health-proof-of-concept-bringing-a-transdisciplinary-approach-to-surveillance-for-zoonotic-viruses-at-the-human-wild-animal-interface
#4
Terra R Kelly, William B Karesh, Christine Kreuder Johnson, Kirsten V K Gilardi, Simon J Anthony, Tracey Goldstein, Sarah H Olson, Catherine Machalaba, Jonna A K Mazet
As the world continues to react and respond inefficiently to emerging infectious diseases, such as Middle Eastern Respiratory Syndrome and the Ebola and Zika viruses, a growing transdisciplinary community has called for a more proactive and holistic approach to prevention and preparedness - One Health. Such an approach presents important opportunities to reduce the impact of disease emergence events and also to mitigate future emergence through improved cross-sectoral coordination. In an attempt to provide proof of concept of the utility of the One Health approach, the US Agency for International Development's PREDICT project consortium designed and implemented a targeted, risk-based surveillance strategy based not on humans as sentinels of disease but on detecting viruses early, at their source, where intervention strategies can be implemented before there is opportunity for spillover and spread in people or food animals...
December 14, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28025125/production-purification-and-immunogenicity-of-recombinant-ebola-virus-proteins-a-comparison-of-freund-s-adjuvant-and-adjuvant-system-03
#5
Krister Melén, Laura Kakkola, Felix He, Kari Airenne, Olli Vapalahti, Helen Karlberg, Ali Mirazimi, Ilkka Julkunen
There is an urgent need for Ebola virus (EBOV) proteins, EBOV-specific antibodies and recombinant antigens to be used in diagnostics and as potential vaccine candidates. Our objective was to produce and purify recombinant proteins for immunological assays and for the production of polyclonal EBOV specific antibodies. In addition, a limited comparison of the adjuvant effects of Freund's complete adjuvant (FCA) and adjuvant system 03 (AS03) was carried out. Recombinant EBOV GST-VP24, -VP30, -VP35, -VP40 and -NP were produced in E...
December 24, 2016: Journal of Virological Methods
https://www.readbyqxmd.com/read/28012899/corning-hyperflask-%C3%A2-for-viral-amplification-and-production-of-diagnostic-reagents
#6
Brian J Kearney, Matthew A Voorhees, Priscilla L Williams, Scott P Olschner, Cynthia A Rossi, Randal J Schoepp
Viral preparations are essential components in diagnostic research and development. The production of large quantities of virus traditionally is done by infecting numerous tissue culture flasks or roller bottles, which require large incubators and/or roller bottle racks. The Corning HYPERFlask(®) is a multilayer flask that uses a gas permeable film to provide gas exchange between the cells and culture medium and the atmospheric environment. This study evaluated the suitability of the HYPERFlask for production of Lassa, Ebola, Bundibugyo, Reston, and Marburg viruses and compared it to more traditional methods using tissue culture flasks and roller bottles...
December 21, 2016: Journal of Virological Methods
https://www.readbyqxmd.com/read/28003349/assessment-and-optimization-of-the-genexpert-diagnostic-platform-for-detection-of-ebola-virus-rna-in-seminal-fluid
#7
James Pettitt, Elizabeth Higgs, Mosoka Fallah, Martha Nason, Eric Stavale, Jonathan Marchand, Cavan Reilly, Kenneth Jensen, Bonnie Dighero-Kemp, Kaylie Tuznik, James Logue, Fatorma Bolay, Lisa Hensley
Recent studies have suggested that Ebola virus (EBOV) RNA potentially present in the semen of a large number of survivors of Ebola virus disease (EVD) in Western Africa may contribute to sexual transmission of EVD and generate new clusters of cases in regions previously declared EBOV free. These findings drive the immediate need for a reliable, rapid, user-friendly assay for detection of EBOV RNA in semen that is deployable to multiple sites across Western Africa. In this study, we optimized the Xpert EBOV assay for semen samples by adding dithiothreitol...
December 21, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27999271/use-of-aptamers-as-diagnostics-tools-and-antiviral-agents-for-human-viruses
#8
REVIEW
Víctor M González, M Elena Martín, Gerónimo Fernández, Ana García-Sacristán
Appropriate diagnosis is the key factor for treatment of viral diseases. Time is the most important factor in rapidly developing and epidemiologically dangerous diseases, such as influenza, Ebola and SARS. Chronic viral diseases such as HIV-1 or HCV are asymptomatic or oligosymptomatic and the therapeutic success mainly depends on early detection of the infective agent. Over the last years, aptamer technology has been used in a wide range of diagnostic and therapeutic applications and, concretely, several strategies are currently being explored using aptamers against virus proteins...
December 16, 2016: Pharmaceuticals
https://www.readbyqxmd.com/read/27994284/assessment-of-ebola-virus-disease-preparedness-in-the-who-south-east-asia-region
#9
Sirenda Vong, Reuben Samuel, Philip Gould, Hammam El Sakka, Bardan J Rana, Vason Pinyowiwat, Supriya Bezbaruah, Roderico Ofrin
OBJECTIVE: To conduct assessments of Ebola virus disease preparedness in countries of the World Health Organization (WHO) South-East Asia Region. METHODS: Nine of 11 countries in the region agreed to be assessed. During February to November 2015 a joint team from WHO and ministries of health conducted 4-5 day missions to Bangladesh, Bhutan, Indonesia, Maldives, Myanmar, Nepal, Sri Lanka, Thailand and Timor-Leste. We collected information through guided discussions with senior technical leaders and visits to hospitals, laboratories and airports...
December 1, 2016: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/27990727/coupling-sensitive-nucleic-acid-amplification-with-commercial-pregnancy-test-strips
#10
Yan Du, Arti Pothukuchy, Jimmy D Gollihar, Armin Nourani, Bingling Li, Andrew D Ellington
The detection of nucleic acid biomarkers for point-of-care (POC) diagnostics is currently limited by technical complexity, cost, and time constraints. To overcome these shortcomings, we have combined loop-mediated isothermal amplification (LAMP), programmable toehold-mediated strand-exchange signal transduction, and standard pregnancy test strips. The incorporation of an engineered hCG-SNAP fusion reporter protein (human chorionic gonadotropin-O(6) -alkylguanine-DNA alkyltransferase) led to LAMP-to-hCG signal transduction on low-cost, commercially available pregnancy test strips...
January 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/27974537/ebola-preparedness-diagnosis-improvement-using-rapid-approaches-for-proficiency-testing
#11
Katherine A Lau, Torsten Theis, Joanna Gray, William D Rawlinson
The unprecedented 2015 Ebola virus (EBOV) outbreak in West Africa was declared a public health emergency, making diagnosis and quality of testing a global issue. The accuracy of laboratory diagnostic capacity for EBOV was assessed in 2014 - 2016 using a proficiency testing (PT) strategy developed by the Royal College of Pathologists of Australasia Quality Assurance Programs (RCPAQAP) in Biosecurity. Following a literature search, EBOV-specific gene targets were ranked according to the frequency of their use in published methods...
December 14, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27972276/cost-of-ebola-virus-disease-diagnosis-using-rapid-point-of-care-diagnostics-in-sierra-leone
#12
J S Evans, N C Hearmon, R C Beale, W Marsh
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27909582/ebola-research-funding-a-systematic-analysis-1997-2015
#13
Joseph Ra Fitchett, Amos Lichtman, Damilola T Soyode, Ariel Low, Jimena Villar de Onis, Michael G Head, Rifat Atun
BACKGROUND: The latest outbreak of Ebola in West Africa overwhelmed the affected countries, with the impact on health extending far beyond Ebola-related deaths that have exceeded 11 000. The need to promptly mobilise resources to control emerging infections is widely recognized. Yet, data on research funding for emerging infections remains inadequately documented. METHODS: We defined research investment as all funding flows for Ebola and/or Marburg virus from 1997 to April 2015 whose primary purpose was to advance knowledge and new technologies to prevent or cure disease...
December 2016: Journal of Global Health
https://www.readbyqxmd.com/read/27864803/enabling-rapid-response-to-the-2014-2016-ebola-epidemic-the-experience-and-the-results-of-the-national-institute-for-infectious-diseases-lazzaro-spallanzani
#14
Emanuele Nicastri, Concetta Castilletti, Mirella Biava, Francesco Maria Fusco, Nicola Petrosillo, Vincenzo Puro, Francesco Nicola Lauria, Maria Rosaria Capobianchi, Antonino Di Caro, Giuseppe Ippolito
The unprecedented epidemic of Ebola virus disease (EVD) in West Africa highlighted the need for stronger systems for disease surveillance, response, and prevention worldwide. Tackling an epidemic event today requires a broader view, not only limited to medical management of the patients, but which also includes heroic efforts by clinicians and public health personnel.Since its foundation in 1936, INMI has been devoted to the prevention, diagnosis and care for infectious diseases. In 2009, INMI became a WHO collaborative center for clinical care, diagnosis, response and training on Highly Infectious Diseases...
November 19, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27855644/febrile-illness-diagnostics-and-the-malaria-industrial-complex-a-socio-environmental-perspective
#15
Justin Stoler, Gordon A Awandare
BACKGROUND: Global prioritization of single-disease eradication programs over improvements to basic diagnostic capacity in the Global South have left the world unprepared for epidemics of chikungunya, Ebola, Zika, and whatever lies on the horizon. The medical establishment is slowly realizing that in many parts of sub-Saharan Africa (SSA), particularly urban areas, up to a third of patients suffering from acute fever do not receive a correct diagnosis of their infection. MAIN BODY: Malaria is the most common diagnosis for febrile patients in low-resource health care settings, and malaria misdiagnosis has soared due to the institutionalization of malaria as the primary febrile illness of SSA by international development organizations and national malaria control programs...
November 17, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27849507/deployment-of-the-1st-area-medical-laboratory-in-a-split-based-configuration-during-the-largest-ebola-outbreak-in-history
#16
Anthony P Cardile, Christopher T Littell, Michael G Backlund, Richard A Heipertz, Jerod A Brammer, Sean M Palmer, Todd J Vento, Felix A Ortiz, William R Rosa, Michael J Major, Patrick M Garman
BACKGROUND: The U.S. Army 1(st) Area Medical Laboratory (1(st) AML) is currently the only deployable medical CBRNE (Chemical, Biological, Radiological, Nuclear, and Explosives) laboratory in the Army's Forces Command. In support of the United States Agency for International Development Ebola response, the U.S. military initiated Operation United Assistance (OUA), and deployed approximately 2,500 service members to support the Government of Liberia's Ebola control efforts. Due to its unique molecular diagnostic and expeditionary capabilities, the 1(st) AML was ordered to deploy in October of 2014 in support of OUA via establishment of Ebola testing laboratories...
November 2016: Military Medicine
https://www.readbyqxmd.com/read/27846221/minimally-symptomatic-infection-in-an-ebola-hotspot-a-cross-sectional-serosurvey
#17
Eugene T Richardson, J Daniel Kelly, Mohamed Bailor Barrie, Annelies W Mesman, Sahr Karku, Komba Quiwa, Regan H Marsh, Songor Koedoyoma, Fodei Daboh, Kathryn P Barron, Michael Grady, Elizabeth Tucker, Kerry L Dierberg, George W Rutherford, Michele Barry, James Holland Jones, Megan B Murray, Paul E Farmer
INTRODUCTION: Evidence for minimally symptomatic Ebola virus (EBOV) infection is limited. During the 2013-16 outbreak in West Africa, it was not considered epidemiologically relevant to published models or projections of intervention effects. In order to improve our understanding of the transmission dynamics of EBOV in humans, we investigated the occurrence of minimally symptomatic EBOV infection in quarantined contacts of reported Ebola virus disease cases in a recognized 'hotspot.' METHODOLOGY/PRINCIPAL FINDINGS: We conducted a cross-sectional serosurvey in Sukudu, Kono District, Sierra Leone, from October 2015 to January 2016...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27818362/impact-of-infectious-disease-epidemics-on-tuberculosis-diagnostic-management-and-prevention-services-experiences-and-lessons-from-the-2014-2015-ebola-virus-disease-outbreak-in-west-africa
#18
Rashid Ansumana, Samuel Keitell, Gregory M T Roberts, Francine Ntoumi, Eskild Petersen, Giuseppe Ippolito, Alimuddin Zumla
The World Health Organization (WHO) annual TB report states twenty-eight percent of the world's 9.6 million new tuberculosis (TB) cases are in the WHO Africa Region. The Mano River Union (MRU) countries of West Africa, Guinea, Sierra Leone and Liberia, have over the past two decades made incremental sustained investments into TB control programs. The devastating 2014-2015 Ebola Virus Disease (EVD) outbreak in West Africa impacted significantly on all sectors of the healthcare systems in the MRU countries, including the TB prevention and control programs...
November 3, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27815125/meeting-report-29th-international-conference-on-antiviral-research-in-la-jolla-ca-usa
#19
REVIEW
R Anthony Vere Hodge
The 29th International Conference on Antiviral Research (ICAR) was held in La Jolla, CA, USA from April 17 to 21, 2016. This report opens with a tribute to the late Chris McGuigan, a Past-President of ISAR, then continues with summaries of the principal invited lectures. Doug Richman (Elion Award) investigated HIV resistance, Bob Vince (Holý Award) showed how carbocyclic nucleoside analogs led to abacavir and Jerome Deval (Prusoff Award) explained how his group chose to seek a nucleoside analog to treat RSV...
January 2017: Antiviral Research
https://www.readbyqxmd.com/read/27808119/directional-and-reoccurring-sequence-change-in-zoonotic-rna-virus-genomes-visualized-by-time-series-word-count
#20
Yoshiko Wada, Kennosuke Wada, Yuki Iwasaki, Shigehiko Kanaya, Toshimichi Ikemura
Ebolavirus, MERS coronavirus and influenza virus are zoonotic RNA viruses, which mutate very rapidly. Viral growth depends on many host factors, but human cells may not provide the ideal growth conditions for viruses invading from nonhuman hosts. The present time-series analyses of short and long oligonucleotide compositions in these genomes showed directional changes in their composition after invasion from a nonhuman host, which are thought to recur after future invasions. In the recent West Africa Ebola outbreak, directional time-series changes in a wide range of oligonucleotides were observed in common for three geographic areas, and the directional changes were observed also for the recent MERS coronavirus epidemics starting in the Middle East...
November 3, 2016: Scientific Reports
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