Major role of dolutegravir in the emergence of the S147G integrase resistance mutation.

Background: The S147G mutation is associated with high-level resistance to the integrase strand transfer inhibitor (INSTI) elvitegravir. In several poorly documented cases, it was also selected in patients on dolutegravir. Given the widespread use of dolutegravir, further studies of S147G are required.

Changes in NNRTI use have not altered the ecology of NNRTI resistance over the last 10 years in people with HIV experiencing virological failure on antiretroviral drugs.

Background: We aimed to determine how non-nucleoside reverse transcriptase inhibitor (NNRTI) resistance profiles have changed over the last decade in people living with HIV (PLWHIV) experiencing virological failure on all antiretroviral treatments, including different NNRTIs.

Materials And Methods: We analysed the use of the different NNRTIs in PLWHIV treated with antiretroviral drugs at an academic centre and the HIV NNRTI resistance profiles observed in cases of virological failure over the last 10 years (2014-23). We used the latest ANRS-MIE algorithm (v33; https://hivfrenchresistance.

Clearance of archived integrase strand transfer inhibitors resistance mutations in people with virologically suppressed HIV infection.

Introduction: We assessed the kinetics of the clearance of integrase strand transfer inhibitors resistance mutations (INSTIs-RMs) and associated factors from people living with HIV (PWH) displaying suppressed viral replication after virological failure (VF) on an INSTI regimen.

Patients And Methods: We included PWH with HIV-RNA viral loads ≤20 copies/mL for at least 5 years in whom INSTIs-RM had been identified at least once in a prior RNA resistance genotyping test. HIV DNAs were sequenced by Sanger sequencing (SS) and ultra-deep sequencing (UDS; detection threshold: 5%) every year over the preceding 5 years.

Dynamics of SARS-CoV-2 variants in West Africa: Insights into genomic surveillance in resource-constrained settings.

SARS-CoV-2 geno-surveillance has been challenging in West Africa. Despite the multiple challenges encountered, particularly in West Africa during the COVID-19 pandemic, efforts were made to circumscribe the spread of the disease and to provide methods and resources for surveillance. We aim to describe the dynamic of SARS-CoV-2 variants and highlight the efforts made in genomic surveillance in West Africa.

Emergent resistance-associated mutations at first- or second-line HIV-1 virologic failure with second-generation InSTIs in two- and three-drug regimens: the Virostar-1 study.

Background: Second-generation integrase strand transfer inhibitors (InSTIs) have a high barrier to resistance and potent antiretroviral activity. They are recommended as first- or second-line (FL and SL) options in two- and three-drug regimens (2DR and 3DR) in international treatment guidelines. However, there are limited real-world data on emerging resistance at the time of virological failure (VF) with these regimens.

Seroprevalence of Anti-SARS-CoV-2 IgG Antibodies among Children attending the Pediatric Hospital in Bamako, Mali (BamaCoV-Kids Study).

Background: This study aimed to assess the seroprevalence of SARS-CoV-2 among children attending pediatric consultations in Bamako, Mali, using a rapid diagnostic test (RDT) on fingertip or venous blood samples.

Methods: A single-center, prospective cross-sectional study was conducted from May to September 2022 at the Pediatric Hospital in Bamako, Mali. Children aged 1 to 15 years underwent phlebotomy or fingertip blood sampling for SARS-CoV-2 antibody testing using the Abbott Panbio COVID-19 IgG/IgM Test.

Surface conversion of the dynamics of bacteria escaping chemorepellents.

Flagellar swimming hydrodynamics confers a recognized advantage for attachment on solid surfaces. Whether this motility further enables the following environmental cues was experimentally explored. Motile E.

(Epi)mutation Rates and the Evolution of Composite Trait Architectures.

AbstractMutation rates vary widely along genomes and across inheritance systems. This suggests that complex traits-resulting from the contributions of multiple determinants-might be composite in terms of the underlying mutation rates. Here we investigate through mathematical modeling whether such a heterogeneity may drive changes in a trait's architecture, especially in fluctuating environments, where phenotypic instability can be beneficial.

The RT M184V resistance mutation clearance in the reservoir is mainly related to CD4 nadir and viral load zenith independently of therapeutic regimen type.

Objectives: Resistance associated mutations (RAMs) are archived in the HIV reservoir and can re-emerge with an inappropriate ART use limiting treatment options. However, recent studies, using ultra-deep sequencing (UDS), showed a decrease of quasispecies harbouring RAMs, suggesting that recycling some antiretrovirals could be considered. The aim of this study was to characterize, in HIV treated PLWHIV, the M184V mutation decrease kinetics in proviral DNA and associated factors of M184V mutation clearance over time.

Enhanced fetal hematopoiesis in response to symptomatic SARS-CoV-2 infection during pregnancy.

Background: Pregnant women and their fetuses are particularly susceptible to respiratory pathogens. How they respond to SARS-CoV-2 infection is still under investigation.

Methods: We studied the transcriptome and phenotype of umbilical cord blood cells in pregnant women infected or not with SARS-CoV-2.

Seroprevalence of Crimean-Congo hemorrhagic fever virus among people living with HIV in Brazzaville, Congo and among blood donors in Bamako, Mali.

Crimean-Congo hemorrhagic fever virus (CCHFV) is the causative agent of Crimean-Congo hemorrhagic fever (CCHF), a highly contagious and potentially fatal emerging disease. We assessed CCHFV seroprevalence by conducting a serological survey of two cohorts from Brazzaville, Congo and Bamako, Mali. We retrospectively screened 581 sera samples, including 352 from monitoring centers for people living with HIV (PLWH) in Brazzaville and 229 provided by the Blood Transfusion Center at Gabriel Touré Hospital in Bamako.

Recommendations on data sharing in HIV drug resistance research.

 • Human immunodeficiency virus (HIV) drug resistance has implications for antiretroviral treatment strategies and for containing the HIV pandemic because the development of HIV drug resistance leads to the requirement for antiretroviral drugs that may be less effective, less well-tolerated, and more expensive than those used in first-line regimens.  • HIV drug resistance studies are designed to determine which HIV mutations are selected by antiretroviral drugs and, in turn, how these mutations affect antiretroviral drug susceptibility and response to future antiretroviral treatment regimens.  • Such studies collectively form a vital knowledge base essential for monitoring global HIV drug resistance trends, interpreting HIV genotypic tests, and updating HIV treatment guidelines.

Pulled, pushed or failed: the demographic impact of a gene drive can change the nature of its spatial spread.

Understanding the temporal spread of gene drive alleles-alleles that bias their own transmission-through modeling is essential before any field experiments. In this paper, we present a deterministic reaction-diffusion model describing the interplay between demographic and allelic dynamics, in a one-dimensional spatial context. We focused on the traveling wave solutions, and more specifically, on the speed of gene drive invasion (if successful).

Evaluation of integrase resistance in individuals who failed a regimen containing dolutegravir in French and Italian clinical settings.

Background: This work aims to evaluate integrase resistance and its predictors in HIV-1 infected combined antiretroviral therapy (cART) experienced individuals failing a dolutegravir-based regimen.

Methods: Major resistance mutations (MRM) and genotypic susceptibility score (GSS) of dolutegravir companion drugs were evaluated on plasma genotypic resistance test (GRT) performed at dolutegravir failure. Logistic regression was used to evaluate factors associated to the risk of integrase strand-transfer inhibitors (INSTI)-resistance at dolutegravir failure.

Phylodynamics of SARS-CoV-2 in France, Europe, and the world in 2020.

Although France was one of the most affected European countries by the COVID-19 pandemic in 2020, the dynamics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) movement within France, but also involving France in Europe and in the world, remain only partially characterized in this timeframe. Here, we analyzed GISAID deposited sequences from January 1 to December 31, 2020 ( = 638,706 sequences at the time of writing). To tackle the challenging number of sequences without the bias of analyzing a single subsample of sequences, we produced 100 subsamples of sequences and related phylogenetic trees from the whole dataset for different geographic scales (worldwide, European countries, and French administrative regions) and time periods (from January 1 to July 25, 2020, and from July 26 to December 31, 2020).