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https://www.readbyqxmd.com/read/28431160/editorial-to-6-month-safety-data-of-ebola-zaire-vaccine-rvsv%C3%AE-g-zebov-gp-in-a-phase-iii-double-blind-placebo-controlled-randomized-study-in-healthy-adults
#1
Matthias J Schnell
No abstract text is available yet for this article.
April 18, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28412830/expression-and-immunogenicity-of-vp40-protein-of-zebov
#2
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/28404856/a-dose-dependent-plasma-signature-of-the-safety-and-immunogenicity-of-the-rvsv-ebola-vaccine-in-europe-and-africa
#3
Angela Huttner, Christophe Combescure, Stéphane Grillet, Mariëlle C Haks, Edwin Quinten, Christine Modoux, Selidji Todagbe Agnandji, Jessica Brosnahan, Julie-Anne Dayer, Ali M Harandi, Laurent Kaiser, Donata Medaglini, Tom Monath, Pascale Roux-Lombard, Peter G Kremsner, Tom H M Ottenhoff, Claire-Anne Siegrist
The 2014-2015 Ebola epidemic affected several African countries, claiming more than 11,000 lives and leaving thousands with ongoing sequelae. Safe and effective vaccines could prevent or limit future outbreaks. The recombinant vesicular stomatitis virus-vectored Zaire Ebola (rVSV-ZEBOV) vaccine has shown marked immunogenicity and efficacy in humans but is reactogenic at higher doses. To understand its effects, we examined plasma samples from 115 healthy volunteers from Geneva who received low-dose (LD) or high-dose (HD) vaccine or placebo...
April 12, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28398679/ebola-virus-disease-and-pregnancy-a-review-of-the-current-knowledge-of-ebola-virus-pathogenesis-maternal-and-neonatal-outcomes
#4
REVIEW
Lisa M Bebell, Titilope Oduyebo, Laura E Riley
The 2014 to 2016 Ebola virus disease (EVD) outbreak in West Africa devastated local health systems and caused thousands of deaths. Historical reports from Zaire ebolavirus outbreaks suggested pregnancy was associated with an increased risk of severe illness and death, with mortality rates from 74 to 100%. In total, 111 cases of pregnant patients with EVD are reported in the literature, with an aggregate maternal mortality of 86%. Pregnancy-specific data published from the recent outbreak include four small descriptive cohort studies and five case reports...
March 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28389867/expression-of-the-vp40-antigen-from-the-zaire-ebolavirus-in-tobacco-plants
#5
Elizabeth Monreal-Escalante, Abel A Ramos-Vega, Jorge A Salazar-González, Bernardo Bañuelos-Hernández, Carlos Angulo, Sergio Rosales-Mendoza
The plant cell is able to produce the VP40 antigen from the Zaire ebolavirus , retaining the antigenicity and the ability to induce immune responses in BALB/c mice. The recent Ebola outbreak evidenced the need for having vaccines approved for human use. Herein we report the expression of the VP40 antigen from the Ebola virus as an initial effort in the development of a plant-made vaccine that could offer the advantages of being cheap and scalable, which is proposed to overcome the rapid need for having vaccines to deal with future outbreaks...
April 7, 2017: Planta
https://www.readbyqxmd.com/read/28356221/rapid-detection-of-all-known-ebolavirus-species-by-reverse-transcription-loop-mediated-isothermal-amplification-rt-lamp
#6
Olamide K Oloniniyi, Yohei Kurosaki, Hiroko Miyamoto, Ayato Takada, Jiro Yasuda
Ebola virus disease (EVD), a highly virulent infectious disease caused by ebolaviruses, has a fatality rate of 25-90%. Without a licensed chemotherapeutic agent or vaccine for the treatment and prevention of EVD, control of outbreaks requires accurate and rapid diagnosis of cases. In this study, five sets of six oligonucleotide primers targeting the nucleoprotein gene were designed for specific identification of each of the five ebolavirus species using reverse transcription-loop mediated isothermal amplification (RT-LAMP) assay...
March 27, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28345293/detection-of-zaire-ebolavirus-in-swine-assay-development-and-optimization
#7
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/28332721/rapid-detection-and-quantification-of-ebola-zaire-virus-by-one-step-real-time-quantitative-reverse-transcription-polymerase-chain-reaction
#8
Young-Tae Ro, Anysha Ticer, Ricardo Carrion, Jean L Patterson
Given that Ebola virus causes severe hemorrhagic fever in humans with mortality rates as high as 90%, rapid and accurate detection of this virus is essential both for controlling infection and preventing further transmission. Here, a one-step qRT-PCR assay for rapid and quantitative detection of an Ebola Zaire strain using GP, VP24 or VP40 genes as a target is introduced. Routine assay conditions for hydrolysis probe detection were established from the manufacturer's protocol used in the assays. The analytical specificity and sensitivity of each assay was evaluated using in vitro synthesized viral RNA transcripts...
April 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28242293/lyophilized-visually-readable-loop-mediated-isothermal-reverse-transcriptase-nucleic-acid-amplification-test-for-detection-ebola-zaire-rna
#9
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/28216187/recombinant-proteins-of-zaire-ebolavirus-induce-potent-humoral-and-cellular-immune-responses-and-protect-against-live-virus-infection-in-mice
#10
Axel T Lehrer, Teri-Ann S Wong, Michael M Lieberman, Tom Humphreys, David E Clements, Russell R Bakken, Mary Kate Hart, William D Pratt, John M Dye
Infections with filoviruses in humans are highly virulent, causing hemorrhagic fevers which result in up to 90% mortality. In addition to natural infections, the ability to use these viruses as bioterrorist weapons is of significant concern. Currently, there are no licensed vaccines or therapeutics available to combat these infections. The pathogenesis of disease involves the dysregulation of the host's immune system, which results in impairment of the innate and adaptive immune responses, with subsequent development of lymphopenia, thrombocytopenia, hemorrhage, and death...
February 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28216184/vaccine-development-for-emerging-virulent-infectious-diseases
#11
Joel N Maslow
The recent outbreak of Zaire Ebola virus in West Africa altered the classical paradigm of vaccine development and that for emerging infectious diseases (EIDs) in general. In this paper, the precepts of vaccine discovery and advancement through pre-clinical and clinical assessment are discussed in the context of the recent Ebola virus, Middle East Respiratory Syndrome coronavirus (MERS-CoV), and Zika virus outbreaks. Clinical trial design for diseases with high mortality rates and/or high morbidity in the face of a global perception of immediate need and the factors that drive design in the face of a changing epidemiology are presented...
February 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28167539/chemically-modified-human-serum-albumin-potently-blocks-entry-of-ebola-pseudoviruses-and-viruslike-particles
#12
Haoyang Li, Fei Yu, Shuai Xia, Yufeng Yu, Qian Wang, Ming Lv, Yan Wang, Shibo Jiang, Lu Lu
Ebola virus (EBOV), the causative pathogen of the deadly Ebola virus disease (EVD), can be transmitted via contact with EVD patients, including sexual contact with EVD survivors. At present, no licensed vaccine or therapeutic is available. In this study, we compared eight anhydride-modified proteins for their entry-inhibitory activity against the pseudovirus (PsV) carrying the envelope glycoprotein (GP) of the EBOV Zaire or Sudan species (Zaire PsV and Sudan PsV, respectively). We found that 3-hydroxyphthalic anhydride-modified human serum albumin (HP-HSA) was the most effective in inhibiting the entry of both Zaire PsV and Sudan PsV, with the 50% effective concentration being at the nanomolar level and with HP-HSA being more potent than EBOV-neutralizing antibody MIL77-2 (4G7, a component antibody of the ZMapp drug cocktail)...
April 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28153004/efficacy-of-artemether-lumefantrine-artesunate-amodiaquine-and-dihydroartemisinin-piperaquine-for-treatment-of-uncomplicated-plasmodium-falciparum-malaria-in-angola-2015
#13
Mateusz M Plucinski, Pedro Rafael Dimbu, Aleixo Panzo Macaia, Carolina Miguel Ferreira, Claudete Samutondo, Joltim Quivinja, Marília Afonso, Richard Kiniffo, Eliane Mbounga, Julia S Kelley, Dhruviben S Patel, Yun He, Eldin Talundzic, Denise O Garrett, Eric S Halsey, Venkatachalam Udhayakumar, Pascal Ringwald, Filomeno Fortes
BACKGROUND: Recent anti-malarial resistance monitoring in Angola has shown efficacy of artemether-lumefantrine (AL) in certain sites approaching the key 90% lower limit of efficacy recommended for artemisinin-based combination therapy. In addition, a controversial case of malaria unresponsive to artemisinins was reported in a patient infected in Lunda Sul Province in 2013. METHODS: During January-June 2015, investigators monitored the clinical and parasitological response of children with uncomplicated Plasmodium falciparum infection treated with AL, artesunate-amodiaquine (ASAQ), or dihydroartemisinin-piperaquine (DP)...
February 2, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28135118/ebola-virus-and-marburg-virus-in-human-milk-are-inactivated-by-holder-pasteurization
#14
Erin Hamilton Spence, Monica Huff, Karen Shattuck, Amy Vickers, Nadezda Yun, Slobodan Paessler
BACKGROUND: Potential donors of human milk are screened for Ebola virus (EBOV) using standard questions, but testing for EBOV and Marburg virus (MARV) is not part of routine serological testing performed by milk banks. Research aim: This study tested the hypothesis that EBOV would be inactivated in donor human milk (DHM) by standard pasteurization techniques (Holder) used in all North American nonprofit milk banks. METHODS: Milk samples were obtained from a nonprofit milk bank...
May 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28096532/a-sensitive-and-specific-point-of-care-detection-assay-for-zaire-ebola-virus
#15
LETTER
Xiao-Ai Zhang, Sabrina Li, Jesus Ching, Hui-Ying Feng, Kun Yang, David L Dolinger, Long-Di Zhang, Pan-He Zhang, Wei Liu, Wu-Chun Cao
No abstract text is available yet for this article.
January 18, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28059773/attosecond-physics-at-the-nanoscale
#16
M F Ciappina, J A Pérez-Hernández, A S Landsman, W A Okell, S Zherebtsov, B Förg, J Schötz, L Seiffert, T Fennel, T Shaaran, T Zimmermann, A Chacón, R Guichard, A Zaïr, J W G Tisch, J P Marangos, T Witting, A Braun, S A Maier, L Roso, M Krüger, P Hommelhoff, M F Kling, F Krausz, M Lewenstein
Recently two emerging areas of research, attosecond and nanoscale physics, have started to come together. Attosecond physics deals with phenomena occurring when ultrashort laser pulses, with duration on the femto- and sub-femtosecond time scales, interact with atoms, molecules or solids. The laser-induced electron dynamics occurs natively on a timescale down to a few hundred or even tens of attoseconds (1 attosecond  =  1 as  =  10(-18) s), which is comparable with the optical field. For comparison, the revolution of an electron on a 1s orbital of a hydrogen atom is  ∼152 as...
May 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28017403/efficacy-and-effectiveness-of-an-rvsv-vectored-vaccine-in-preventing-ebola-virus-disease-final-results-from-the-guinea-ring-vaccination-open-label-cluster-randomised-trial-ebola-%C3%A3-a-suffit
#17
Ana Maria Henao-Restrepo, Anton Camacho, Ira M Longini, Conall H Watson, W John Edmunds, Matthias Egger, Miles W Carroll, Natalie E Dean, Ibrahima Diatta, Moussa Doumbia, Bertrand Draguez, Sophie Duraffour, Godwin Enwere, Rebecca Grais, Stephan Gunther, Pierre-Stéphane Gsell, Stefanie Hossmann, Sara Viksmoen Watle, Mandy Kader Kondé, Sakoba Kéïta, Souleymane Kone, Eewa Kuisma, Myron M Levine, Sema Mandal, Thomas Mauget, Gunnstein Norheim, Ximena Riveros, Aboubacar Soumah, Sven Trelle, Andrea S Vicari, John-Arne Røttingen, Marie-Paule Kieny
BACKGROUND: rVSV-ZEBOV is a recombinant, replication competent vesicular stomatitis virus-based candidate vaccine expressing a surface glycoprotein of Zaire Ebolavirus. We tested the effect of rVSV-ZEBOV in preventing Ebola virus disease in contacts and contacts of contacts of recently confirmed cases in Guinea, west Africa. METHODS: We did an open-label, cluster-randomised ring vaccination trial (Ebola ça Suffit!) in the communities of Conakry and eight surrounding prefectures in the Basse-Guinée region of Guinea, and in Tomkolili and Bombali in Sierra Leone...
February 4, 2017: Lancet
https://www.readbyqxmd.com/read/28017399/safety-and-immunogenicity-of-a-recombinant-adenovirus-type-5-vector-based-ebola-vaccine-in-healthy-adults-in-sierra-leone-a-single-centre-randomised-double-blind-placebo-controlled-phase-2-trial
#18
Feng-Cai Zhu, Alie H Wurie, Li-Hua Hou, Qi Liang, Yu-Hua Li, James B W Russell, Shi-Po Wu, Jing-Xin Li, Yue-Mei Hu, Qiang Guo, Wen-Bo Xu, Abdul R Wurie, Wen-Juan Wang, Zhe Zhang, Wen-Jiao Yin, Manal Ghazzawi, Xu Zhang, Lei Duan, Jun-Zhi Wang, Wei Chen
BACKGROUND: A recombinant adenovirus type-5 vector-based vaccine expressing the glycoprotein of Ebola Zaire Makona variant showed good safety and immunogenicity in a phase 1 trial of healthy Chinese adults. We aimed to assess the safety and immunogenicity of this vaccine in healthy adults in Sierra Leone and to determine the optimal dose. METHODS: We did a single-centre, randomised, double-blind, placebo-controlled, phase 2 clinical trial at Sierra Leone-China Friendship Hospital, Freetown, Sierra Leone...
December 22, 2016: Lancet
https://www.readbyqxmd.com/read/28003349/assessment-and-optimization-of-the-genexpert-diagnostic-platform-for-detection-of-ebola-virus-rna-in-seminal-fluid
#19
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
https://www.readbyqxmd.com/read/27998698/ocular-complications-in-survivors-of-the-ebola-outbreak-in-guinea
#20
Esther Hereth He'bert, Mamadou Oury Bah, Jean François E'tard, Mamadou Saliou Sow, Serge Resnikoff, Christine Fardeau, Abdoulaye Toure', Alexis Niouma Ouendeno, Isaac Ceougna Sagno, Laura March, Suzanne Izard, Pierre Louis Lama, Moumié Barry, Eric Delaporte
PURPOSE: The Ebola outbreak of 2013-2016 severely affected West Africa and resulted in 2544 deaths and 1270 survivors in Guinea, the country where it began. This Ebola virus was the Zaire strain of the virus family Filoviridae. In this outbreak the case fatality rate was about 67%. The survivors, declared cured after two negative blood PCR results, face psychosocial disorders, rheumatic, ear-nose-throat, neurocognitive, and ophthalmological complications. The goal of this study was to detect and describe ocular complications afflicting these survivors and to observe their occurrence and recurrences...
December 17, 2016: American Journal of Ophthalmology
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