Publications by authors named "Daouda Sissoko"

Introduction: Pediatric hydrocephalus is a common disease in sub-Saharan Africa. In Mali, 350-400 new cases are diagnosed in our center yearly. With a total land mass of 1,241,000 km2, patients in remote areas must travel up to 1,500 km to access neurosurgical care.

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Article Synopsis
  • - The study focused on the potential sexual transmission of Ebola virus in male survivors, particularly examining the use of favipiravir, an antiviral drug, to treat those with the virus detected in semen.
  • - A phase IIa trial was conducted in 2016 with male Ebola survivors, administering high doses of favipiravir, but it faced recruitment challenges and only two participants completed the study.
  • - Results indicated that the high doses of favipiravir were well tolerated with minor adverse effects, highlighting the need for further research on its safety and effectiveness for treating severe viral diseases.
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  • In 2015, a study at an Ebola treatment center in Guinea assessed data from 286 EVD patients, focusing on factors like blood chemistry and the impact of favipiravir treatment.
  • 163 patients were selected for a detailed analysis, revealing that favipiravir-treated patients had a lower case-fatality rate and longer survival times compared to untreated patients.
  • While favipiravir treatment did not show a statistically significant impact on overall survival rates, it indicated a trend towards better outcomes consistent with previous research.
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Background: The pathophysiology of Ebola virus disease (EVD) is still poorly understood. This study aimed at identifying soluble biomarkers that inform on disease mechanisms.

Methods: Fifty-four soluble mediators of the immune, coagulation, and endothelial system were measured in baseline and follow-up samples from hospitalized patients with EVD, using Luminex technology.

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During the 2013-2016 west African Ebola outbreak that affected West Africa, accelerated clinical trials, testing unproven but promising and potentially lifesaving experimental interventions emerged as a key component of the global outbreak. In 2017, no Ebola medical countermeasures had proven antiviral efficacy in patients. However, in September 2014, the World Health Organization inventoried a list of potential drug candidates developed or repurposed with demonstrated antiviral efficacy in vitro or in animal models.

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In this study, samples from the 2013-2016 West African Ebola virus outbreak from patients in Guinea with Ebola virus disease (EVD) were analyzed to discover and classify what other pathogens were present. Throat swabs were taken from deceased EVD patients, and peripheral blood samples were analyzed that had been taken from patients when they presented at the treatment center with acute illness. High-throughput RNA sequencing (RNA-seq) and bioinformatics were used to identify the potential microorganisms.

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During the large Ebola outbreak that affected West Africa in 2014 and 2015, studies were launched to evaluate potential treatments for the disease. A clinical trial to evaluate the effectiveness of the antiviral drug favipiravir was conducted in Guinea. This paper describes the main challenges of the implementation of the trial in the Ebola treatment center of Guéckédou.

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The reported case fatality ratios (CFR) of Ebola virus disease (EVD) have been as high as 90% in previous outbreaks. While the cumulative CFR among patients medically evacuated and treated in Western countries was inferior to 20%, it peaked to approximately 75% between September and December 2014 in West Africa, thereafter decreasing to less than 40% (May 2015) without current evidence of major virus mutations capable to alter virus pathogenicity over the course of the epidemic. Therefore, the observed diminution of CFR is likely to reflect improvement of EVD patient care.

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Background: In 2014-2015, we assessed favipiravir tolerance and efficacy in patients with Ebola virus (EBOV) disease (EVD) in Guinea (JIKI trial). Because the drug had never been used before for this indication and that high concentrations of the drugs were needed to achieve antiviral efficacy against EBOV, a pharmacokinetic model had been used to propose relevant dosing regimen. Here we report the favipiravir plasma concentrations that were achieved in participants in the JIKI trial and put them in perspective with the model-based targeted concentrations.

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Background: In 2014, Western Africa experienced an unanticipated explosion of Ebola virus infections. What distinguishes fatal from non-fatal outcomes remains largely unknown, yet is key to optimising personalised treatment strategies. We used transcriptome data for peripheral blood taken from infected and convalescent recovering patients to identify early stage host factors that are associated with acute illness and those that differentiate patient survival from fatality.

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Background: By January, 2016, all known transmission chains of the Ebola virus disease (EVD) outbreak in west Africa had been stopped. However, there is concern about persistence of Ebola virus in the reproductive tract of men who have survived EVD. We aimed to use biostatistical modelling to describe the dynamics of Ebola virus RNA load in seminal fluid, including clearance parameters.

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A 9-month-old infant died from Ebola virus (EBOV) disease with unknown epidemiological link. While her parents did not report previous illness, laboratory investigations revealed persisting EBOV RNA in the mother's breast milk and the father's seminal fluid. Genomic analysis strongly suggests EBOV transmission to the child through breastfeeding.

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We report on an Ebola virus disease (EVD) survivor who showed Ebola virus in seminal fluid 531 days after onset of disease. The persisting virus was sexually transmitted in February 2016, about 470 days after onset of symptoms, and caused a new cluster of EVD in Guinea and Liberia.

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Article Synopsis
  • Ebola virus disease (EVD) is highly fatal, and during the 2014 outbreak, the WHO identified favipiravir as a potential treatment, but ethical concerns prevented randomized trials.
  • Instead, a multicenter non-randomized trial was conducted where all patients received favipiravir to assess its feasibility, safety, and effectiveness in treating EVD.
  • Participants were selected based on specific criteria and received a set dosage of favipiravir, with the goal of gathering preliminary data to inform future research rather than establish definitive treatment guidelines.
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Background: Children unreached by vaccination are at higher risk of poor health outcomes and India accounts for nearly a quarter of unvaccinated children worldwide. The objective of this study was to investigate compositional and contextual determinants of non-receipt of childhood vaccines in India using multilevel modelling.

Methods And Findings: We studied characteristics of unvaccinated children using the District Level Health and Facility Survey 3, a nationally representative probability sample containing 65 617 children aged 12-23 months from 34 Indian states and territories.

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Background: Although Dengue virus (DENV) circulation had been documented in neighbouring South-western Indian Ocean Islands, its presence in Mayotte is poorly characterised. To address this issue, we aimed to assess the seroprevalence of dengue IgG antibodies (DENV-IgG Ab) among the population and to investigate potential associations with individual and household characteristics.

Methods/principal Findings: In November-December 2006 we conducted a cross-sectional serologic survey in Mayotte among 1,154 inhabitants aged≥2 years by using a multistage cluster random sampling method.

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Background: To record and assess the clinical features of chikungunya fever (CHIKF), with a view to enable diagnosis based on clinical criteria rather than costly laboratory procedures in field conditions.

Methods: As part of a cross-sectional serologic survey conducted in Mayotte after a massive chikungunya outbreak in 2006, we collected data on clinical features of chikungunya infection and assessed the performance and accuracy of clinical case definition criteria combining different symptoms.

Results: Of 1154 participants included, 440 (38.

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Background: In 2005-2006, a major epidemic of CHIKV infection occurred in the Islands of the south-western Indian Ocean, and longstanding manifestations seemed to be more frequent than described before.

Objectives: To describe the frequency and related factors of late clinical manifestations of CHIKV infection among imported cases living in Aquitaine area, France.

Study Design: All patients recruited through the travel clinic and tropical medicine unit of the University Hospital Centre of Bordeaux with possible CHIKV infection were prospectively recorded, and confirmed cases of CHIKV infection were interviewed 2 years after infection.

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After the 2006-2007 epidemic wave of Rift Valley fever (RVF) in East Africa and its circulation in the Comoros, laboratory case-finding of RVF was conducted in Mayotte from September 2007 through May 2008. Ten recent human RVF cases were detected, which confirms the indigenous transmission of RFV virus in Mayotte.

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Although the acute manifestations of Chikungunya virus (CHIKV) illness are well-documented, few data exist about the long-term rheumatic outcomes of CHIKV-infected patients. We undertook between June and September 2006 a retrospective cohort study aimed at assessing the course of late rheumatic manifestations and investigating potential risk factors associated with the persistence of these rheumatic manifestations over 15 months. 147 participants (>16 yrs) with laboratory-confirmed CHIKV disease diagnosed between March 1 and June 30, 2005, were identified through a surveillance database and interviewed by telephone.

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Background: Since 2006, Chikungunya virus (CHIKV) has re-emerged as an important pathogen of global concern. However, individual and household factors associated with the acquisition and the magnitude of clinically silent CHIKV infections remain poorly understood. In this present study, we aimed to investigate the seroprevalence, estimate the proportion of symptomatic illness and identify the risk factors for CHIKV infection in the primo-exposed population of Mayotte.

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