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https://www.readbyqxmd.com/read/28412830/expression-and-immunogenicity-of-vp40-protein-of-zebov
#1
Yinbiao Wang, Xiao Liu, Ling Tao, Pengwei Xu, Xia Gao, Huijun Li, Zhongzhi Yang, Weidong Wu
BACKGROUND: EBOV outbreaks continue to threaten the world due to the absence of effective vaccines and therapeutics. Easy-to-use and rapid diagnostic tests for EBOV are highly desired for prevention and control of the EVD epidemic. METHODS: Escherichia coli expression system was used to express VP40 protein of Zaire Ebola virus (ZEBOV) as water-soluble protein upon optimization of temperature, time, and IPTG concentration. VP40 protein was purified through Ni-NTA affinity chromatography and applied to immunize rabbits for immunogenicity analysis...
April 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28396470/case-study-design-and-implementation-of-training-for-scientists-deploying-to-ebola-diagnostic-field-laboratories-in-sierra-leone-october-2014-to-february-2016
#2
REVIEW
Christopher H Logue, Suzanna M Lewis, Amber Lansley, Sara Fraser, Clare Shieber, Sonal Shah, Amanda Semper, Daniel Bailey, Jason Busuttil, Liz Evans, Miles W Carroll, Nigel J Silman, Tim Brooks, Jane A Shallcross
As part of the UK response to the 2013-2016 Ebola virus disease (EVD) epidemic in West Africa, Public Health England (PHE) were tasked with establishing three field Ebola virus (EBOV) diagnostic laboratories in Sierra Leone by the UK Department for International Development (DFID). These provided diagnostic support to the Ebola Treatment Centre (ETC) facilities located in Kerry Town, Makeni and Port Loko. The Novel and Dangerous Pathogens (NADP) Training group at PHE, Porton Down, designed and implemented a pre-deployment Ebola diagnostic laboratory training programme for UK volunteer scientists being deployed to the PHE EVD laboratories...
May 26, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28396466/the-contribution-of-biological-mathematical-clinical-engineering-and-social-sciences-to-combatting-the-west-african-ebola-epidemic
#3
REVIEW
Christopher J M Whitty
The tragic West African Ebola epidemic claimed many lives, but would have been worse still if scientific insights from many disciplines had not been integrated to create a strong technical response. Epidemiology and modelling triggered the international response and guided where response efforts were directed; virology, engineering and clinical science helped reduce deaths and transmission in and from hospitals and treatment centres; social sciences were key to reducing deaths from funerals and in the community; diagnostic and operational research made the response more efficient; immunology and vaccine research contributed to the final stages of the epidemic and will help prevent future epidemics...
May 26, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28376850/depressive-symptoms-among-survivors-of-ebola-virus-disease-in-conakry-guinea-preliminary-results-of-the-postebogui-cohort
#4
Mamady Mory Keita, Bernard Taverne, Sékou Sy Savané, Laura March, Morifodé Doukoure, Mamadou Saliou Sow, Abdoulaye Touré, Jean François Etard, Moumié Barry, Eric Delaporte
BACKGROUND: The 2013-2016 West African Ebola outbreak infected 28,616 people and caused 11,310 deaths by 11 May 2016, across six countries. The outbreak has also resulted in the largest number of EVD survivors in history-over 17,000. Guinea was declared Ebola-free on 1 June 2016. Reports from the outbreak documented 3814 cases resulting in 2544 deaths and 1270 survivors. EVD survivors face various neuropsychological and psycho-affective alterations that have not been fully identified yet...
April 4, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28352651/clinical-virological-and-biological-parameters-associated-with-outcomes-of-ebola-virus-infection-in-macenta-guinea
#5
Marie-Astrid Vernet, Stéphanie Reynard, Alexandra Fizet, Justine Schaeffer, Delphine Pannetier, Jeremie Guedj, Max Rives, Nadia Georges, Nathalie Garcia-Bonnet, Aboubacar I Sylla, Péma Grovogui, Jean-Yves Kerherve, Christophe Savio, Sylvie Savio-Coste, Marie-Laure de Séverac, Philippe Zloczewski, Sandrine Linares, Souley Harouna, Bing M'Lebing Abdoul, Frederic Petitjean, Nenefing Samake, Susan Shepherd, Moumouni Kinda, Fara Roger Koundouno, Ludovic Joxe, Mathieu Mateo, Patrick Lecine, Audrey Page, Tang Maleki Tchamdja, Matthieu Schoenhals, Solenne Barbe, Bernard Simon, Tuan Tran-Minh, Christophe Longuet, François L'Hériteau, Sylvain Baize
BACKGROUND. The pathogenesis of Ebola virus (EBOV) disease (EVD) is poorly characterized. The establishment of well-equipped diagnostic laboratories close to Ebola treatment centers (ETCs) has made it possible to obtain relevant virological and biological data during the course of EVD and to assess their association with the clinical course and different outcomes of the disease. METHODS. We were responsible for diagnosing EBOV infection in patients admitted to two ETCs in forested areas of Guinea. The pattern of clinical signs was recorded, and an etiological diagnosis was established by RT-PCR for EBOV infection or a rapid test for malaria and typhoid fever...
March 23, 2017: JCI Insight
https://www.readbyqxmd.com/read/28345293/detection-of-zaire-ebolavirus-in-swine-assay-development-and-optimization
#6
B S Pickering, B Collignon, G Smith, P Marszal, G Kobinger, H M Weingartl
Ebolaviruses (family Filoviridae, order Mononegavirales) cause often fatal, haemorrhagic fever in primates including humans. Pigs have been identified as a species susceptible to Reston ebolavirus (RESTV) infection, with indicated transmission to humans in the Philippines; however, their role during Ebola outbreaks in Africa needs to be clarified. To perform surveillance studies, detection of ebolavirus requires a prerequisite validation of viral RNA and antibody detection methods in swine samples. These diagnostic tests also need to be suitable for deployment to low-level containment laboratories...
March 27, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28315708/2016-international-meeting-of-the-global-virus-network
#7
REVIEW
Ramesh Akkina, Heinz Ellerbrok, William Hall, Hideki Hasegawa, Yasushi Kawaguchi, Harold Kleanthous, Edward McSweegan, Natalia Mercer, Victor Romanowski, Hirofumi Sawa, Anders Vahlne
The Global Virus Network (GVN) was established in 2011 in order to strengthen research and responses to current viral causes of human disease and to prepare against new viral pandemic threats. There are now 38 GVN Centers of Excellence and 6 Affiliate laboratories in 24 countries. GVN scientists meet annually to learn about each other's current research, address collaborative priorities and plan future programs. The 2016 meeting was held from October 23-25 in Hokkaido, Japan, in partnership with the Japanese Society for Virology, the National Institute of Infectious Diseases of Japan and the Research Center for Zoonosis Control of Hokkaido University...
March 16, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28285168/design-and-use-of-mouse-control-dna-for-dna-biomarker-extraction-and-pcr-detection-from-urine-application-for-transrenal-mycobacterium-tuberculosis-dna-detection
#8
Hali Bordelon, Keersten M Ricks, Megan E Pask, Patricia K Russ, Francesca Solinas, Mark L Baglia, Philip A Short, Andrew Nel, Jonathan Blackburn, Keertan Dheda, Carlos Zamudio, Tatiana Cáceres, David W Wright, Frederick R Haselton, April C Pettit
Urine samples are increasingly used for diagnosing infections including Escherichia coli, Ebola virus, and Zika virus. However, extraction and concentration of nucleic acid biomarkers from urine is necessary for many molecular detection strategies such as polymerase chain reaction (PCR). Since urine samples typically have large volumes with dilute biomarker concentrations making them prone to false negatives, another impediment for urine-based diagnostics is the establishment of appropriate controls particularly to rule out false negatives...
March 9, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28258817/characteristics-and-survival-of-patients-with-ebola-virus-infection-malaria-or-both-in-sierra-leone-a-retrospective-cohort-study
#9
Matthew Waxman, Adam R Aluisio, Soham Rege, Adam C Levine
BACKGROUND: The 2014-15 Ebola virus disease (EVD) epidemic strained health systems in west Africa already overburdened with other diseases, including malaria. Because EVD and malaria can be difficult to distinguish clinically, and rapid testing was not available in many Ebola Treatment Units (ETUs), guidelines recommended empirical malaria treatment. Little is known, however, about the prevalence and characteristics of patients entering an ETU who were infected with malaria parasites, either alone or concurrently with Ebola virus...
February 28, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28250002/evaluating-novel-diagnostics-in-an-outbreak-setting-lessons-learned-from-ebola
#10
Nira R Pollock, Betsy Wonderly
Inadequate access to rapid testing for Ebola virus disease during the 2014-16 outbreak led to an explosion in the development of diagnostics that could be performed at or near the point-of-care and by less experienced operators, leading in turn to an acute need for novel test evaluation. Here, we present the challenges to novel diagnostic development and evaluation in an emergency setting, and suggestions for potential new "global emergency standards" to address them.
March 1, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28242293/lyophilized-visually-readable-loop-mediated-isothermal-reverse-transcriptase-nucleic-acid-amplification-test-for-detection-ebola-zaire-rna
#11
Christoph Carter, Kevan Akrami, Drew Hall, Davey Smith, Eliah Aronoff-Spencer
Recent viral outbreaks highlight the need for reliable, yet broadly deployable diagnostics for detection of epidemic and emerging pathogens. In this study we designed and optimized methods to visually detect viral nucleic acid by isothermal amplification and SYBR dye intercalation. We designed and tested loop-mediated isothermal amplification (LAMP) primers and lyophilized reactions to optimize the detection of Zaire Ebola Virus (ZEBOV) and further evolved the LAMP platform to allow room-temperature storage for deployment in resource limited settings...
February 24, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28231242/predicting-ebola-infection-a-malaria-sensitive-triage-score-for-ebola-virus-disease
#12
Mary-Anne Hartley, Alyssa Young, Anh-Minh Tran, Harry Henry Okoni-Williams, Mohamed Suma, Brooke Mancuso, Ahmed Al-Dikhari, Mohamed Faouzi
BACKGROUND: The non-specific symptoms of Ebola Virus Disease (EVD) pose a major problem to triage and isolation efforts at Ebola Treatment Centres (ETCs). Under the current triage protocol, half the patients allocated to high-risk "probable" wards were EVD(-): a misclassification speculated to predispose nosocomial EVD infection. A better understanding of the statistical relevance of individual triage symptoms is essential in resource-poor settings where rapid, laboratory-confirmed diagnostics are often unavailable...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28180136/sequencing-of-ebola-virus-genomes-using-nanopore-technology
#13
Thomas Hoenen
Sequencing of virus genomes during disease outbreaks can provide valuable information for diagnostics, epidemiology, and evaluation of potential countermeasures. However, particularly in remote areas logistical and technical challenges can be significant. Nanopore sequencing provides an alternative to classical Sanger and next-generation sequencing methods, and was successfully used under outbreak conditions (Hoenen et al., 2016; Quick et al., 2016). Here we describe a protocol used for sequencing of Ebola virus under outbreak conditions using Nanopore technology, which we successfully implemented at the CDC/NIH diagnostic laboratory (de Wit et al...
November 5, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28109682/label-free-checkerboard-assay-to-determine-overlapping-epitopes-of-ebola-virus-vp-40-antibodies-using-surface-plasmon-resonance
#14
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 19, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28057165/current-and-future-diagnostic-tests-for-ebola-virus-disease
#15
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
#16
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
#17
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...
February 1, 2017: 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
#18
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
#19
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
#20
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) ribonucleic acid (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 EVD-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...
February 15, 2017: Journal of Infectious Diseases
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