Digital Rolling Circle Amplification–Based Detection of Ebola and Other Tropical Viruses

Publication date: Available online 16 December 2019Source: The Journal of Molecular DiagnosticsAuthor(s): Sibel Ciftci, Felix Neumann, Samir Abdurahman, K. Sofia Appelberg, Ali Mirazimi, Mats Nilsson, Narayanan MadaboosiEmerging tropical viruses have caused serious outbreaks during the recent years, such as Ebola virus (EBOV) in 2014 and the most recent in 2018 to 2019 in Congo. Thus, immediate diagnostic attention is demanded at the point of care in resource-limited settings, because the performance and the operational parameters of conventional EBOV testing are limited. Especially, their sensitivity, specificity, and coverage of other tropical disease viruses make them unsuitable for diagnostic at the point of care. Here, a padlock probe (PLP)-based rolling circle amplification (RCA) method for the detection of EBOV is presented. For this, a set of PLPs, separately targeting the viral RNA and complementary RNA of all seven EBOV genes, was used in the RCA assay and validated on virus isolates from cell culture. The assay was then translated for testing clinical samples, and simultaneous detection of both EBOV RNA types was demonstrated. For increased sensitivity, the RCA products were enriched on a simple and pump-free microfluidic chip. Because PLPs and RCA are inherently multiplexable, we demonstrate the extension of the probe panel for the simultaneous detection of the tropical viruses Ebola, Zika, and Dengue. The demonstrated high specificity, sensitivity, and multiplexi...
Source: The Journal of Molecular Diagnostics - Category: Pathology Source Type: research

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Publication date: Available online 16 December 2019Source: The Journal of Molecular DiagnosticsAuthor(s): Sibel Ciftci, Felix Neumann, Samir Abdurahman, K. Sofia Appelberg, Ali Mirazimi, Mats Nilsson, Narayanan MadaboosiAbstractEmerging tropical viruses have caused serious outbreaks during the recent years, such as Ebola virus (EBOV) in 2014 and the most recent in 2018-19 in Congo. Thus, immediate diagnostic attention is demanded at the point-of-care in resource-limited settings, since the performance and the operational parameters of conventional EBOV testing are limited. Especially, their sensitivity, specificity and cov...
Source: The Journal of Molecular Diagnostics - Category: Pathology Source Type: research
A Danish and Taiwanese company has won Australia’s Good Design Award for a portable diagnostic device—small enough to fit in a camera case—that allows diagnosis of infectious diseases on the spot from a single drop of blood. “The Good Design Award ranked BluBox as the best solution for the rapid and accurate assessment of communicable diseases in heavily populated as well as resource-constrained, expertise-lacking areas,” explained Filippo Bosco, CEO and one of the three founders of BluSense Diagnostics (Copenhagen). The secret inside...
Source: MDDI - Category: Medical Devices Authors: Tags: IVD Source Type: news
In recent years, public health threats due to Zika virus (ZIKV) and Ebola virus have increased awareness among the ophthalmic community regarding the visual effect of ocular sequelae identified in association with these emerging infectious diseases. Yellow fever virus (YFV), deemed the “original viral hemorrhagic fever,” resides in the Flavivirus family, which includes other mosquito-borne illnesses, including Dengue (DENV), West Nile (WNV), and ZIKV. Forty-seven countries in Africa (34 [72.3%]) and Central and South America (13 [27.7%]) are endemic for, or have regions endemi c for, YFV, underscoring its globa...
Source: JAMA Ophthalmology - Category: Opthalmology Source Type: research
In this study, we evaluated ATA as a potential antiviral drug against ZIKV replication. The antiviral activity of ATA against ZIKV replication in vitro showed median inhibitory concentrations (IC50) of 13.87 ± 1.09 μM and 33.33 ± 1.13 μM in Vero and A549 cells, respectively; without showing any cytotoxic effect in both cell lines (median cytotoxic concentration (CC50)> 1,000 μM). Moreover, ATA protected both cell types from ZIKV-induced cytopathic effect (CPE) and apoptosis in a time- and concentration-dependent manner. In addition, pre-treatment of Vero cells with ATA for up to 72 h also resulted...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Adriano Queiroz1, Isabella Fernanda Dantas Pinto2, Maricélia Lima3, Marta Giovanetti1,4, Jaqueline Goes de Jesus1, Joilson Xavier1, Fernanda Khouri Barreto5, Gisele André Baptista Canuto6, Helineide Ramos do Amaral7, Ana Maria Bispo de Filippis4, Denise Lima Mascarenhas8, Melissa Barreto Falcão8, Normeide Pedreira Santos8, Vasco Ariston de Carvalho Azevedo9, Marcos Yukio Yoshinaga2*, Sayuri Miyamoto2 and Luiz Carlos Junior Alcantara1,4,10* 1Laboratório de Patologia Experimental, Instituto Gonçalo Moniz, Salvador, Brazil 2Departamento de Bioquímica, Instituto de Quími...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
(CNN) — From climate change to superbugs, the World Health Organization has laid out 10 big threats to our global health in 2019. And unless these threats get addressed, millions of lives will be in jeopardy. Here’s a snapshot of 10 urgent health issues, according to the United Nations’ public health agency: Not vaccinating when you can One of the most controversial recent health topics in the US is now an international concern. “Vaccine hesitancy — the reluctance or refusal to vaccinate despite the availability of vaccines — threatens to reverse progress made in tackling vaccine-prevent...
Source: WBZ-TV - Breaking News, Weather and Sports for Boston, Worcester and New Hampshire - Category: Consumer Health News Authors: Tags: Health News CNN Local TV Source Type: news
This report summarizes the lectures held at the meeting and highlights advances in the field.
Source: Antiviral Therapy - Category: Virology Source Type: research
This report summarizes the lectures held at the meeting and highlights advances in the field. PMID: 30597184 [PubMed - as supplied by publisher]
Source: Antiviral Research - Category: Virology Authors: Tags: Antiviral Res Source Type: research
Publication date: Available online 17 March 2018Source: Microbes and InfectionAuthor(s): Sagar B. Kudchodkar, Hyeree Choi, Emma L. Reuschel, Rianne Esquivel, Jackie Jin-Ah Kwon, Moonsup Jeong, Joel N. Maslow, Charles C. Reed, Scott White, J. Joseph Kim, Gary P. Kobinger, Pablo Tebas, David B. Weiner, Kar MuthumaniAbstractVaccines are considered one of the greatest advances in modern medicine. The global burden of numerous infectious diseases has been significantly reduced, and in some cases, effectively eradicated through the deployment of specific vaccines. However, efforts to develop effective new vaccines against infect...
Source: Microbes and Infection - Category: Infectious Diseases Source Type: research
DAVID E. BLOOM is the Clarence James Gamble Professor of Economics and Demography, DANIEL CADARETTE is a research assistant, and JP SEVILLA is a research associate, all at Harvard University’s T.H. Chan School of Public Health.By David E. Bloom, Daniel Cadarette and JP SevillaWASHINGTON DC, Jul 3 2018 (IPS)Infectious diseases and associated mortality have abated, but they remain a significant threat throughout the world.We continue to fight both old pathogens, such as the plague, that have troubled humanity for millennia and new pathogens, such as human immunodeficiency virus (HIV), that have mutated or spilled over ...
Source: IPS Inter Press Service - Health - Category: International Medicine & Public Health Authors: Tags: Active Citizens Development & Aid Economy & Trade Global Headlines Health TerraViva United Nations Source Type: news
More News: Congo Health | Dengue Fever | Ebola | Genetics | Outbreaks | Pathology | Zika Virus