Publications by authors named "Florence Morel"

Drug-resistant tuberculosis is a substantial health-care concern worldwide. Despite culture-based methods being considered the gold standard for drug susceptibility testing, molecular methods provide rapid information about the Mycobacterium tuberculosis mutations associated with resistance to anti-tuberculosis drugs. This consensus document was developed on the basis of a comprehensive literature search, by the TBnet and RESIST-TB networks, about reporting standards for the clinical use of molecular drug susceptibility testing.

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The "Intervention Program based on Self" (IPSELF) project was created to address the gap between the acquisition of life skills during prevention programs and their application with a session for developing one's self-concept included in the European program "Unplugged". The present study evaluated its effectiveness. A total of 157 middle school students (94 girls, 63 boys, = 12.

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Article Synopsis
  • Ethionamide (ETH) is a second-line drug for treating tuberculosis, but resistance to it (ETH-R) is primarily caused by mutations in specific genes and is difficult to diagnose.
  • A study assessed the detection methods for ETH-R in 497 multidrug-resistant (MDR-TB) isolates collected in France from 2008 to 2016, using both genetic sequencing and standard susceptibility testing.
  • Results showed that mutations linked to ETH-R were present in 76% of resistant isolates but only 28% of susceptible ones; however, the study found that identifying mutations from certain databases improved the accuracy of diagnosing ETH-R.
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We report the emergence of an atpE mutation in a clinical Mycobacterium tuberculosis strain. Genotypic and phenotypic bedaquiline susceptibility testing displayed variable results over time and ultimately were not predictive of treatment outcome. This observation highlights the limits of current genotypic and phenotypic methods for detection of bedaquiline resistance.

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Background: In response to the COVID-19 pandemic, the French government took many measures, the most notable of which was a national lockdown on 17 March 2020. Its effects have been widely studied, but to our knowledge, no study has sought to determine how adolescents have adapted to cope with this situation. The present study set out to explore teenagers' stress levels, coping strategies, and substance use during this period.

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The GeneLEAD VIII (Diagenode, Belgium) is a new, fully automated, sample-to-result precision instrument for the extraction of DNA and PCR detection of complex (MTBC) directly from clinical samples. The Deeplex Myc-TB assay (Genoscreen, France) is a diagnostic kit based on the deep sequencing of a 24-plexed amplicon mix allowing simultaneously the detection of resistance to 13 antituberculous (antiTB) drugs and the determination of spoligotype. We evaluated the performance of a strategy combining the both mentioned tools to detect directly from clinical samples, in 8 days, MTBC and its resistance to 13 antiTB drugs, and identify potential transmission of strains from patient-to-patient.

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Context: Disseminated infections due to Bacillus Calmette-Guérin (BCG) are unusual and occur mostly in patients with inborn error of immunity (IEI) or acquired immunodeficiency. However, cases of secondary BCGosis due to intravesical BCG instillation have been described. Herein, we present a case of severe BCGosis occurring in an unusual situation.

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Article Synopsis
  • Mycobacterium leprae, which doesn't grow in lab conditions, complicates the study of its antimicrobial resistance (AMR), so researchers rely on molecular methods for diagnosis.
  • This study systematically reviewed DNA gyrase gene mutations in clinical isolates to understand their link to fluoroquinolone (FQ) resistance, aiming to establish a standardized numbering system for mutation locations.
  • Analyzed data from 25 studies showed that 4% of isolates had mutations in DNA gyrase, leading to the development of a consensus system and a 3D structural model to assess the effects of these mutations on FQ susceptibility.
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The MDR/MTB ELITe MGB kit (ELITech) carried on the ELITe InGenius platform is a new real-time PCR assay allowing automated extraction and detection of DNA of the complex (MTB) and mutations in the and genes and promoter region (pro-) associated to resistance to rifampicin and isoniazid, the two markers of multidrug-resistant TB (MDR). We assessed the performances of the test on a collection of strains ( = 54) and a set of clinical samples ( = 242) from routine practice, comparatively to TB diagnosis and genotypic drug susceptibility testing (gDST) as references. Regarding the 242 clinical samples, the sensitivity and specificity of MTB detection by ELITe were 90.

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is a common cause of sepsis and is particularly associated with healthcare-associated infections. New strategies are needed to prevent or treat infections due to the emergence of multi-drug resistant . The goal of this study was to determine the diversity and distribution of O (lipopolysaccharide) and K (capsular polysaccharide) antigens on a large (>500) global collection of strains isolated from blood to inform vaccine development efforts.

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Background: The resistance to all aminoglycosides (AGs) conferred by 16S rRNA methyltransferase enzymes (16S-RMTases) is a major public health concern.

Objectives: To characterize the resistance genotype, its genetic environment and plasmid support, and the phylogenetic relatedness of 16S-RMTase-producing Escherichia coli from France.

Methods: We screened 137 E.

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The Clinical and Laboratory Standards Institute recommends the use of Mueller Hinton (MH) medium to perform drug susceptibility testing (DST) of complex (MAC) using the microdilution method. For MAC, there has been no study on the impact of media on the determination of minimum inhibitory concentrations (MICs) of antibiotics other than clarithromycin. This study aimed at determining the impact of two media used for DST of MAC and at augmenting the number of pertinent MICs for MAC species encountered in clinical practice.

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Through the past decade, MALDI-TOF MS has been recognized as a fast and robust tool for identification of most bacteria in clinical microbiology. However, the accuracy of this method to identify Neisseria species is still debated, and few data are available about commensal Neisseria species identification. In this study, we assessed two MALDI-TOF MS systems (Bruker Biotyper and Andromas) for the identification of 88, 18, and 29 isolates of Neisseria gonorrhoeae, Neisseria meningitidis, and commensal Neisseria species, respectively.

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Context: Calcification of the arterial wall in diabetes contributes to the arterial occlusive process occurring below the knee. The osteoprotegerin (OPG)/receptor activator of nuclear factor κB ligand (RANKL) system is suspected to be involved in the calcification process.

Objective: The aim of the study was to investigate whether there is a link between arterial calcification in type 2 diabetes and 1) conventional cardiovascular risk factors, 2) serum RANKL and OPG levels, and 3) neuropathy.

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