Search results for "PARASITOLOGIE"
showing 4 items of 14 documents
Identification of the Weevil immune genes and their expression in the bacteriome tissue
2008
Abstract Background Persistent infections with mutualistic intracellular bacteria (endosymbionts) are well represented in insects and are considered to be a driving force in evolution. However, while pathogenic relationships have been well studied over the last decades very little is known about the recognition of the endosymbionts by the host immune system and the mechanism that limits their infection to the bacteria-bearing host tissue (the bacteriome). Results To study bacteriome immune specificity, we first identified immune-relevant genes of the weevil Sitophilus zeamais by using suppressive subtractive hybridization (SSH) and then analyzed their full-length coding sequences obtained b…
Exploring the diversity of listeria monocytogenes biofilm architecture by high-throughput confocal laser scanning microscopy and the predominance of …
2015
ABSTRACT Listeria monocytogenes is involved in food-borne illness with a high mortality rate. The persistence of the pathogen along the food chain can be associated with its ability to form biofilms on inert surfaces. While most of the phenotypes associated with biofilms are related to their spatial organization, most published data comparing biofilm formation by L. monocytogenes isolates are based on the quantitative crystal violet assay, which does not give access to structural information. Using a high-throughput confocal-imaging approach, the aim of this work was to decipher the structural diversity of biofilms formed by 96 L. monocytogenes strains isolated from various environments. Pr…
La plaine de la Tille (Côte-d’Or, Bourgogne), du Néolithique à l’Antiquité. Étude pluridisciplinaire du remplissage de struc tures archéologiques en …
2013
National audience; À l’occasion des récentes fouilles archéologiques réalisées dans la plaine de la Tille, au sud-est de Dijon (Bourgogne), une approche luridisciplinaire croisant micromorphologie, palynologie et paléoparasitologie, a été mise en oeuvre. Son objet était d’exploiter au mieux les informations piégées dans le remplissage de structures creusées entre le Néolithique moyen et l’Antiquité, sachant que ces structures constituentsouvent les seuls vestiges de ces occupations passées. Les premiers résultats de cette approche permettent de discuter différents points touchant aux modalités d’occupation et à la dynamique environnementale.
Regulatory networks underlying mycorrhizal development delineated by genome-wide expression profiling and functional analysis of the transcription fa…
2017
Background: Ectomycorrhizal (ECM) fungi develop a mutualistic symbiotic interaction with the roots of their host plants. During this process, they undergo a series of developmental transitions from the running hyphae in the rhizosphere to the coenocytic hyphae forming finger-like structures within the root apoplastic space. These transitions, which involve profound, symbiosis-associated metabolic changes, also entail a substantial transcriptome reprogramming with coordinated waves of differentially expressed genes. To date, little is known about the key transcriptional regulators driving these changes, and the aim of the present study was to delineate and functionally characterize the trans…