Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Concept

Salmonella

Publications associées (24)

Reconstruction and analysis of genome-scale metabolic networks in single organisms and microbial communities

Evangelia Vagena

Microorganisms are a key component in the chain of life. They are essential for agriculture, produce a large proportion of oxygen, and play a central role in the cycle of elements. Microorganisms are widely used in the production of food and alcoholic beve ...

EPFL2024

Sporadic type VI secretion in seventh pandemic Vibrio cholerae

Melanie Blokesch, Sandrine Stutzmann, Natalia Carolina Drebes Dorr, Nicolas René Chiaruttini, Loriane Bader, Sandrine Natacha Isaac, Lisa Christina Metzger, Alexis Joseph Proutière

Vibrio cholerae is a pathogen that causes disease in millions of people every year by colonizing the small intestine and then secreting the potent cholera toxin. How the pathogen overcomes the colonization barrier created by the host’s natural microbiota i ...

2023

Antimicrobial susceptibility testing with integrated photonic crystal optical tweezers

Nicolas Villa

The abusive use of antimicrobial drugs during the last eighty years has favoured the natural selection of resistant pathogens able to neutralise drugs efficiently. Nowadays, antimicrobial resistance contributes to millions of deaths yearly, threatens the e ...

EPFL2023

Host-Pathogen Interactions Through the Genomic Lens

Zhi Ming Xu

Hosts and pathogens are involved in a long-standing evolutionary arms race characterized by successive rounds of evolution. Specifically, while hosts evolve resistance against infections, pathogens adapt to re-establish virulence. Since the signatures of t ...

EPFL2023

Preparation and Analysis of Bacteria Surface-Modified with Polymer Nanoparticles

Lisa Patricia Elisabeth Bader

Cell-based drug carriers present an interesting approach to improve the targeted delivery of therapeutic drugs in vivo. Specifically, bacterial cells possess interesting properties such as motility and sensing that allow some strains to selectively target ...

EPFL2022

Spatio-temporal modeling of the crowding conditions and metabolic variability in microbial communities

Vassily Hatzimanikatis, Liliana Angeles Martinez

The metabolic capabilities of the species and the local environment shape the microbial interactions in a community either through the exchange of metabolic products or the competition for the resources. Cells are often arranged in close proximity to each ...

2021

Human commensal gut Proteobacteria withstand type VI secretion attacks through immunity protein-independent mechanisms

Melanie Blokesch, Sandrine Stutzmann, Candice Stoudmann, Leonardo Filipe Lemos Rocha, Nina Vesel, Nicolas Olmo Flaugnatti, Sandrine Natacha Isaac, Thibault Géry L Sana

While the major virulence factors for Vibrio cholerae, the cause of the devastating diarrheal disease cholera, have been extensively studied, the initial intestinal colonization of the bacterium is not well understood because non-human adult animals are re ...

Nature Research2021

Genomic Characterization of Mycobacterium lepraeto Explore Transmission Patterns Identifies New Subtype in Bangladesh

Stewart Cole, Andrej Benjak, Charlotte Avanzi

Mycobacterium leprae, the causative agent of leprosy, is an unculturable bacterium with a considerably reduced genome (3.27 Mb) compared to homologues mycobacteria from the same ancestry. In 2001, the genome ofM. lepraewas first described and subsequently ...

Frontiers Media SA2020

Bacteria inactivation during the drying of struvite fertilizers produced from stored urine

Tamar Kohn, Loïc Decrey, Manfred Schoger, Heather Nicole Bischel-Magnan

Human urine can be processed into market-attractive fertilizers like struvite; however, concerns regarding the microbial safety of such products remain. The present study evaluated the inactivation of in situ heterotrophs, total bacteria as observed by flo ...

Amer Chemical Soc2016

A microfluidic cell-trapping device for single-cell tracking of host-microbe interactions

John McKinney, Jean-Baptiste Bureau, Matthieu Jean-Hubert Delincé

The impact of cellular individuality on host-microbe interactions is increasingly appreciated but studying the temporal dynamics of single-cell behavior in this context remains technically challenging. Here we present a microfluidic platform, InfectChip, t ...

Royal Society of Chemistry2016

Circulation of a Quorum-Sensing-Impaired Variant of Vibrio cholerae Strain C6706 Masks Important Phenotypes

Melanie Blokesch, Sandrine Stutzmann

Vibrio cholerae, the causative agent of cholera, is a model organism for studying virulence regulation, biofilm formation, horizontal gene transfer, and the cell-to-cell communication known as quorum sensing (QS). As in any research field, discrepancies be ...

Amer Soc Microbiology2016

Inactivation kinetics and mechanisms of viral and bacterial pathogen surrogates during urine nitrification

Tamar Kohn, Heather Nicole Bischel-Magnan, Ariane Schertenleib

This paper assesses the inactivation performance and mechanisms in urine nitrification reactors using bacteria and bacteriophages as surrogates for human pathogens. Two parallel continuous-flow moving bed biofilm reactors (MBBRs) were operated over a two-m ...

Royal Soc Chemistry2015

Structure of viral membrane-penetrating machines by electron cryo-microscopy and tomography

Sergey Nazarov

My PhD thesis aims to obtain the structure of several bacteriophages, including so-called “jumbo” phages, using the electron cryo-microscopy (cryo-EM) and to study the structural transformation of these viruses as they attach and infect the host cell. We a ...

EPFL2015

Genetic, molecular and physiological basis of variation in Drosophila gut immunocompetence

Bruno Lemaitre, Bart Deplancke, Maroun Bou Sleiman, Andreas Massouras, Dani Osman

Gut immunocompetence involves immune, stress and regenerative processes. To investigate the determinants underlying inter-individual variation in gut immunocompetence, we perform enteric infection of 140 Drosophila lines with the entomopathogenic bacterium ...

Nature Publishing Group2015

Hydrological, Anthropogenic and Ecological Processes in Cholera Dynamics

Lorenzo Righetto

The present Thesis deals with understanding, measuring and modelling epidemic cholera. The relevance of the endeavour stems from the fact that mathematical epidemiology, properly guided by model-guided field validation, is a reliable and powerful tool to m ...

EPFL2013

A Multivalent Adsorption Apparatus Explains the Broad Host Range of Phage phi92: a Comprehensive Genomic and Structural Analysis

Petr Leiman, Sergey Nazarov, Christopher Browning

Bacteriophage phi92 is a large, lytic myovirus isolated in 1983 from pathogenic Escherichia coli strains that carry a polysialic acid capsule. Here we report the genome organization of phi92, the cryoelectron microscopy reconstruction of its virion, and th ...

American Society for Microbiology2012

The detrimental influence of bacteria (E. coli, Shigella and Salmonella) on the degradation of organic compounds (and vice versa) in TiO2 photocatalysis and near-neutral photo-Fenton processes under simulated solar light

César Pulgarin

TiO2 photocatalytic and near-neutral photo-Fenton processes were tested under simulated solar light to degrade two models of natural organic matter -resorcinol (R) (which should interact strongly with TiO2 surfaces) and hydroquinone (H) -separately or in t ...

2012

A community effort towards a knowledge-base and mathematical model of the human pathogen Salmonella Typhimurium LT2

Muhittin Emre Özdemir

Background: Metabolic reconstructions (MRs) are common denominators in systems biology and represent biochemical, genetic, and genomic (BiGG) knowledge-bases for target organisms by capturing currently available information in a consistent, structured mann ...

2011

Assembly Mechanisms and Cellular Effects of Bacterial Pore-Forming Toxins

Mirko Bischofberger

The correct assembly of macromolecular protein complexes such as ribosomes or multisubunit membrane channels is essential for their function. Alterations in the process can lead to disease either by loss of function or by acquisition of toxic function. How ...

EPFL2011

TiO2 PHOTOCATALYTIC INACTIVATION UNDER SIMULATED SOLAR LIGHT OF BACTERIAL CONSORTIA IN DOMESTIC WASTEWATERS PREVIOUSLY TREATED BY UASB, DUCKWEED AND FACULTATIVE PONDS

César Pulgarin, Julian Andrés Rengifo Herrera

In this work, TiO2 photocatalysis was used to disinfect domestic wastewaters previously treated by different biological treatment systems: Upward-flow Anaerobic Sludge Blanket (UASB), facultative pond, and duckweed pond. The microorganisms monitored were E ...

Sociedade Brasileira de Quimica / Sociedade Brasileira de Química2010