scholarly journals Increased evolutionary rate in the 2014 West African Ebola outbreak is due to transient polymorphism and not positive selection

2014 ◽  
Author(s):  
Stephanie J. Spielman ◽  
Austin G. Meyer ◽  
Claus O. Wilke
Keyword(s):  
Substitution Rate ◽  
Rapid Evolution ◽  
Sequence Divergence ◽  
West African ◽  
Evolutionary Analysis ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Molecular Clock Model ◽  
Current Outbreak ◽  
Zaire Ebolavirus

Gire et al. (Science 345:1369-1372, 2014) analyzed 81 complete genomes sampled from the 2014 Zaire ebolavirus (EBOV) outbreak and reported "rapid accumulation of [...] genetic variation" and a substitution rate that was "roughly twice as high within the 2014 outbreak as between outbreaks." These findings have received widespread attention, and many have perceived Gire et al.'s results as implying rapid adaptation of EBOV to humans during the current outbreak. Here, we argue that, on the contrary, sequence divergence in EBOV is rather limited, and that the currently available data contain no robust signal of particularly rapid evolution or adaptation to humans. The doubled substitution rate can be attributed entirely to the application of a molecular-clock model to a population of sequences with minimal divergence and segregating polymorphisms. Our results highlight how subtle technical aspects of sophisticated evolutionary analysis methods may result in highly-publicized, misconstrued statements about an ongoing public health crisis.

scholarly journals Successful Outcomes of Severe COVID-19 in Patient with Chronic Lymphocytic Leukemia: Diagnostic Challenges in Immunocompromised Hosts

2020 ◽  
Vol 12 (1) ◽  
pp. e2020044
Author(s):  
Alexandre Malek
Keyword(s):  
Public Health ◽  
Chronic Lymphocytic Leukemia ◽  
Clinical Presentation ◽  
Severe Case ◽  
Lymphocytic Leukemia ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Current Outbreak ◽  
Novel Coronavirus ◽  
Immunocompromised Hosts

The emergence and spread of 2019 novel coronavirus has led to an unprecedented public health crisis around the globe and has threatened the life of millions of people. We report a severe case of COVID-19 in a patient with chronic lymphocytic leukemia and describe primarily the clinical presentation and the challenges encountered in the COVID-19 diagnosis, treatment and specimens sampling pitfalls. This case highlights the importance of a comprehensive diagnostic approach of pneumonia in immunocompromised hosts, including timely and safe bronchoscopy, because the broad differential diagnosis, more challenging with the current outbreak of COVID-19.

scholarly journals The Ebola clinical trials: a precedent for research ethics in disasters

2016 ◽  
Vol 44 (1) ◽  
pp. 3-8 ◽  
Author(s):  
Philippe Calain
Keyword(s):  
Clinical Trials ◽  
Research Ethics ◽  
Ad Hoc ◽  
West African ◽  
Compassionate Use ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Therapeutic Development ◽  
Therapeutic Research ◽  
Adaptive Trial

The West African Ebola epidemic has set in motion a collective endeavour to conduct accelerated clinical trials, testing unproven but potentially lifesaving interventions in the course of a major public health crisis. This unprecedented effort was supported by the recommendations of an ad hoc ethics panel convened in August 2014 by the WHO. By considering why and on what conditions the exceptional circumstances of the Ebola epidemic justified the use of unproven interventions, the panel's recommendations have challenged conventional thinking about therapeutic development and clinical research ethics. At the same time, unanswered ethical questions have emerged, in particular: (i) the specification of exceptional circumstances, (ii) the specification of unproven interventions, (iii) the goals of interventional research in terms of individual versus collective interests, (iv) the place of adaptive trial designs and (v) the exact meaning of compassionate use with unapproved interventions. Examination of these questions, in parallel with empirical data from research sites, will help build pragmatic foundations for disaster research ethics. Furthermore, the Ebola clinical trials signal an evolution in the current paradigms of therapeutic research, beyond the case of epidemic emergencies.

Mutation rate and genotype variation of Ebola virus from Mali case sequences

Science ◽  
2015 ◽  
Vol 348 (6230) ◽  
pp. 117-119 ◽  
Author(s):  
T. Hoenen ◽  
D. Safronetz ◽  
A. Groseth ◽  
K. R. Wollenberg ◽  
O. A. Koita ◽  
...  
Keyword(s):  
Public Health ◽  
Molecular Diagnostics ◽  
Substitution Rate ◽  
Ebola Virus ◽  
Nucleotide Substitution ◽  
Rapid Evolution ◽  
Nucleotide Substitution Rate ◽  
Outbreak Response ◽  
Genotype Variation ◽  
Current Outbreak

The occurrence of Ebola virus (EBOV) in West Africa during 2013–2015 is unprecedented. Early reports suggested that in this outbreak EBOV is mutating twice as fast as previously observed, which indicates the potential for changes in transmissibility and virulence and could render current molecular diagnostics and countermeasures ineffective. We have determined additional full-length sequences from two clusters of imported EBOV infections into Mali, and we show that the nucleotide substitution rate (1.3 × 10–3 substitutions per site per year) is consistent with rates observed in Central African outbreaks. In addition, overall variation among all genotypes observed remains low. Thus, our data indicate that EBOV is not undergoing rapid evolution in humans during the current outbreak. This finding has important implications for outbreak response and public health decisions and should alleviate several previously raised concerns.

scholarly journals TnCentral: a Prokaryotic Transposable Element Database and Web Portal for Transposon Analysis

mBio ◽  
2021 ◽  
Author(s):  
Karen Ross ◽  
Alessandro M. Varani ◽  
Erik Snesrud ◽  
Hongzhan Huang ◽  
Danillo Oliveira Alvarenga ◽  
...  
Keyword(s):  
Public Health ◽  
Antibiotic Resistance ◽  
Critical Role ◽  
Rapid Evolution ◽  
Animal Husbandry ◽  
Agricultural Crops ◽  
Multiple Antibiotic Resistance ◽  
Health Crisis ◽  
The Public ◽  
Public Health Crisis

The ability of bacteria to undergo rapid evolution and adapt to changing environmental circumstances drives the public health crisis of multiple antibiotic resistance, as well as outbreaks of disease in economically important agricultural crops and animal husbandry. Prokaryotic transposable elements (TE) play a critical role in this.

Molecular characterization of SARS-CoV-2

2020 ◽  
Vol 20 ◽  
Author(s):  
Miribane Dërmaku-Sopjani ◽  
Mentor Sopjani
Keyword(s):  
Public Health ◽  
Drug Targets ◽  
Virus Genome ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Therapeutic Drugs ◽  
New Public Health ◽  
New Public ◽  
And Function

Abstract:: The coronavirus disease 2019 (COVID-19) is currently a new public health crisis threatening the world. This pandemic disease is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The virus has been reported to be originated in bats and by yet unknown intermediary animals were transmitted to humans in China 2019. The SARSCoV- 2 spreads faster than its two ancestors the SARS-CoV and Middle East respiratory syndrome coronavirus (MERSCoV) but has reduced fatality. At present, the SARS-CoV-2 has caused about a 1.16 million of deaths with more than 43.4 million confirmed cases worldwide, resulting in a serious threat to public health globally with yet uncertain impact. The disease is transmitted by inhalation or direct contact with an infected person. The incubation period ranges from 1 to 14 days. COVID-19 is accompanied by various symptoms, including cough, fatigue. In most people the disease is mild, but in some other people, such as in elderly and people with chronic diseases, it may progress from pneumonia to a multi-organ dysfunction. Many people are reported asymptomatic. The virus genome is sequenced, but new variants are reported. Numerous biochemical aspects of its structure and function are revealed. To date, no clinically approved vaccines and/or specific therapeutic drugs are available to prevent or treat the COVID-19. However, there are reported intensive researches on the SARSCoV- 2 to potentially identify vaccines and/or drug targets, which may help to overcome the disease. In this review, we discuss recent advances in understanding the molecular structure of SARS-CoV-2 and its biochemical characteristics.

Preparation and Antitubercular Activities of Palindromic Hydrazinecarbothioamides and Carbonothioic Dihydrazides

2019 ◽  
Vol 16 (11) ◽  
pp. 1202-1210 ◽  
Author(s):  
Michael Joseps Hearn ◽  
Gwendolyn Towers ◽  
Michael Henry Cynamon
Keyword(s):  
High Resolution Mass Spectrometry ◽  
Virulent Strain ◽  
Chemotherapeutic Agents ◽  
Disc Diffusion ◽  
Global Public Health ◽  
Health Crisis ◽  
Chemical Structures ◽  
Public Health Crisis ◽  
Zones Of Inhibition ◽  
Diffusion Assay

Background:With approximately one-third of the world’s population infected, tuberculosis continues to be a global public health crisis. The rise of strains that are unusually virulent or highly resistant to current drugs is a cause of special concern, prompting research into new classes of compounds, as well as the re-evaluation of known chemotherapeutic agents.Objectives:The antimycobacterial activities associated with some recently-reported thiocarbonyl compounds kindled our interest in the synthesis of substituted hydrazinecarbothioamides (3) and carbonothioic dihydrazides (4), with the aim of investigating their potential in antitubercular drug design and discovery.Methods:In the present study, the title compounds 3 and 4 were prepared by the condensation of hydrazines with isothiocyanates in reactions readily controlled by stoichiometry, temperature and solvent. The compounds were assessed against Mycobacterium bovis BCG in Kirby-Bauer disc diffusion, and minimum inhibitory concentrations were determined against the virulent strain M. tuberculosis Erdman.Results:The chemical structures of these thermally stable compounds were determined by IR, 1HNMR, 13C-NMR, high-resolution mass spectrometry and elemental analysis. In the Kirby-Bauer disc diffusion assay, some of the compounds showed substantial diameters of inhibition against BCG. In some cases, the zones of inhibition were so large that no growth at all was observed on the assay plates. Against M. tuberculosis Erdman, several of the compounds showed significant activities. Compound 3h was the most active, demonstrating a minimum inhibitory concentration of 0.5 µg/mL.Conclusion:We found that the title compounds may be prepared conveniently in excellent purity and good yields. They are readily identified on the basis of their characteristic spectra. Some members of this class showed significant activities against mycobacteria. We conclude that further work will be warranted in exploring the antitubercular properties of these compounds.

Anticipating on a post covid-19 world and the pivotal role of science and technology

Coronaviruses ◽  
2020 ◽  
Vol 01 ◽  
Author(s):  
Saeed Khan ◽  
Tusha Sharma ◽  
Basu Dev Banerjee ◽  
Scotty Branch ◽  
Shea Harrelson
Keyword(s):  
Public Health ◽  
Pivotal Role ◽  
Public Healthcare ◽  
Healthcare Organizations ◽  
Health Crisis ◽  
Outbreak Management ◽  
The Public ◽  
Public Health Crisis ◽  
Future Outbreak

: Currently, Coronavirus disease 2019 (COVID-19) has transformed into a severe public health crisis and wreaking havoc worldwide. The ongoing pandemic has exposed the public healthcare system's weaknesses and highlighted the urgent need for investments in scientific programs and policies. A comprehensive program utilizing the science and technologydriven strategies combined with well-resourced healthcare organizations appears to be essential for current and future outbreak management.

Communications and Politics

2018 ◽  
Author(s):  
Joshua M. Sharfstein
Keyword(s):  
Public Health ◽  
Disease Control ◽  
Accurate Information ◽  
Political Judgment ◽  
Political Leaders ◽  
Health Crisis ◽  
Public Health Crisis ◽  
Control And Prevention ◽  
Public Health Officials ◽  
Centers For Disease Control

An effective communications approach starts with a basic dictum set forth by the Centers for Disease Control and Prevention: “Be first, be right, be credible.” Agencies must establish themselves as vital sources of accurate information to maintain the public’s trust. At the same time, public health officials must recognize that communications play out in the context of ideological debates, electoral rivalries, and other political considerations. During a public health crisis, this means that health officials often need to constructively engage political leaders in communications and management. Navigating these waters in the middle of a crisis can be treacherous. Figuring out the best way to engage elected leaders is a core aspect of political judgment.

The Public Health Crisis Survival Guide

2018 ◽  
Author(s):  
Joshua M. Sharfstein
Keyword(s):  
Public Health ◽  
Police Officers ◽  
Health Agency ◽  
Health Improvement ◽  
Strong Response ◽  
Popular Imagination ◽  
Health Crisis ◽  
The Public ◽  
Public Health Crisis ◽  
Critical Skills

Firefighters fight fires. Police officers race to crime scenes, sirens blaring. And health officials? Health officials respond to crises. There are infectious disease crises, budget crises, environmental health crises, human resources crises—and many more. At such critical moments, what happens next really matters. A strong response can generate greater credibility and authority for a health agency and its leadership, while a bungled response can lead to humiliation and even resignation. Health officials must be able to manage and communicate effectively as emotions run high, communities become engaged, politicians lean in, and journalists circle. In popular imagination, leaders intuitively rise to the challenge of a crisis: Either they have what it takes or they do not. In fact, preparation is invaluable, and critical skills can be learned and practiced. Students and health officials alike can prepare not only to avoid catastrophe during crises, but to take advantage of new opportunities for health improvement. The Public Health Crisis Survival Guide provides historical perspective, managerial insight, and strategic guidance to help health officials at all levels not just survive but thrive in the most challenging of times.

scholarly journals Expert Advisory Groups: Exploring the Sensemaking Proces s During a Public Health C risis R esponse

2018 ◽  
Author(s):  
Iva Seto ◽  
David Johnstone ◽  
Jennifer Campbell-Meier
Keyword(s):  
Public Health ◽  
Decision Makers ◽  
Process Information ◽  
Unexpected Event ◽  
Health Crisis ◽  
Creation Process ◽  
Public Health Crisis ◽  
Advisory Groups ◽  
Expert Advisory ◽  
Meaning Creation

In a public health crisis, experts (such as epidemiologists, public health officers, physicians and virologists) support key decision  makers with advice in a highly dynamic, pressured,  and time-sensitive context. Experts must process information (to provide advice) as quickly as possible, yet this must be balanced with ensuring the information is credible, reliable,  and relevant. When an unexpected event occurs, it may lead to a gap between what is  experienced and what was expected; sensemaking is a meaning creation process which is engaged to fill the gap. This research explores how experts engage in sensemaking during a  public health crisis.

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