Bacteria commonly live in dense and genetically diverse communities associated with surfaces. In these communities, competition for resources and space is intense, and yet we understand little of how this affects the spread of antibiotic- resistant strains. Here, we study interactions between antibiotic-resistant and susceptible strains using in vi...
Aerobic granular sludge (AGS) has been recently studied and developed as a way to circumvent the poor settling and biomass retention capacity of conventional activated sludge. While it is known that AGS allows the simultaneous presence of oxic and anoxic zones on the surface or within granules, respectively, the actual composition dynamics of those...
En Europe, le bois est la première source d’énergie renouvelable. La transition énergétique se traduit par une intensification de l’exploitation des forêts. L’effet de ces pratiques sylvicoles sur les communautés microbiennes du sol est encore peu étudié. Au cours de ma thèse, j’ai évalué les conséquences d’une manipulation artificielle de matière ...
Dans des expériences récemment réalisées au laboratoire, des clones de F. tularensis ont été exposés à des concentrations croissantes d’antibiotiques. Au cours de cette expérience d’évolution expérimentale, les bactéries ont acquis un haut niveau de résistance aux FQ. Cette résistance s’est accompagnée de mutations sur la cible des FQ soient les to...
BACKGROUND & AIMS:Faecalibacterium prausnitzii, a member of the Clostridium IV group of the Firmicutes phylum that is abundant in the intestinal microbiota, has anti-inflammatory effects. The relative level of F prausnitzii is decreased in fecal samples from patients with inflammatory bowel diseases (IBDs) compared with healthy individuals. Reduced...
Earthworms contribute to numerous ecosystem services provided by soils. Most of the studies focusing on the contributions of earthworms on leaf litter decomposition were conducted by comparing distinct ecological categories (epigeic, epi-anecic, anecic strict and endogeic), whereas their specific contributions within a given ecological category rem...
Antibiotics have been used for the treatment of bacterial infections for over 70 years, saving millions of lives. The current antibiotic resistance crisis has been attributed to the overuse and misuse of these medications. Therefore, the prevention of infection transmission by the rapid and sensitive detection of antibiotic resistant strains is nee...
TiO2 and Ag nanoparticle multilayered films were constructed on model substrates and textiles via Layer-by-Layer (LbL) assembly. The TiO2 nanoparticle based films constructed on model substrates showed a non-conventional photocatalytic behaviour for gas phase formic acid mineralisation upon UV-A irradiation, and a high mineralisation was obtained f...
Among the aquatic animal production in Brazil for consumption purposes, Nile tilapia is prominent, and precisely because it is so appreciated, its microbiological quality must be adequate. Thus, this work had as objective to verify the presence or not of Staphylococcus spp., A bacterium responsible for outbreaks of food poisoning, in tilapia in the...
Context In France, during cyclic population surges, water voles, Arvicola terrestri, cause extensive damage to mountain grassland. A working group consisting of researchers from the University of Franche-Comté (UFC), INRA (Centre de Biologie et de Gestion des Populations) agricultural organizations (Fédération Régionale de Défense contre les Organi...
