Comparative analysis of virulence factors produced by strains isolated from chronic wounds or bloodstream infections.

is an important pathogen associated with both chronic wounds and bloodstream infections. Virulence factors required for the establishment of acute and chronic infections differ substantially. Since bacteremia can be a severe outcome of wound colonization, we performed a comparative analysis of virulence between strains isolated from the bloodstream and chronic wounds.

Characterization of the oxidative stress response regulatory network in Bacteroides fragilis: An interaction between BmoR and OxyR regulons promotes abscess formation in a model of intra-abdominal infection.

Objectives: Bacteroides fragilis is an anaerobic bacterium that is commonly found in the human gut microbiota and an opportunistic pathogen in extra-intestinal infections. B. fragilis displays a robust response to oxidative stress which allows for survival in oxygenated tissues such as the peritoneal cavity and lead to the formation of abscesses.

Bioactive small molecules produced by the human gut microbiome modulate sessile and planktonic lifestyles.

Humans live in symbiosis with a diverse community of microorganisms, which has evolved to carry out many specific tasks that benefit the host, including protection against invading pathogens. Within the chemical diversity of the gastrointestinal tract, small molecules likely constitute chemical cues for the communication between the microbiota and pathogens. Therefore, we sought to investigate if molecules produced by the human gut microbiota show biological activity against the human pathogen .

The role of two-component regulatory systems in environmental sensing and virulence in .

Adaptation to environments with constant fluctuations imposes challenges that are only overcome with sophisticated strategies that allow bacteria to perceive environmental conditions and develop an appropriate response. The gastrointestinal environment is a complex ecosystem that is home to trillions of microorganisms. Termed microbiota, this microbial ensemble plays important roles in host health and provides colonization resistance against pathogens, although pathogens have evolved strategies to circumvent this barrier.

Cross-reactivity and immunotherapeutic potential of BamA recombinant protein from Acinetobacter baumannii.

Acinetobacter baumannii is an important nosocomial pathogen. BamA is a protein that belongs to a complex responsible for organizing the proteins on the bacterial outer membrane. In this work, we aimed to evaluate murine immune responses to BamA recombinant protein (rAbBamA) from A.