Salmonella Typhimurium intestinal colonization niche

The Salmonella Typhimurium intestinal colonization niche refers to the specific biological and chemical environment within the host gut that the pathogen exploits to establish infection and outcompete resident microbiota (Stecher et al., 2007, PLoS Biology). This niche is characterized by an inflamed state where the host immune response generates reactive oxygen species, which react with endogenous sulfur compounds to produce tetrathionate, an electron acceptor that Salmonella uses for anaerobic respiration (Winter et al., 2010, Nature). Additionally, the pathogen utilizes specific carbon sources like ethanolamine that are often underutilized by commensal bacteria (Thiennimitr et al., 2011, PNAS). Targeting this niche involves therapeutic strategies such as competitive exclusion by probiotics, the use of antibiotics, or the development of inhibitors targeting unique bacterial metabolic pathways (Lopez et al., 2012, ISME J). Understanding this niche is crucial for developing treatments that can clear the infection without causing collateral damage to the protective gut microbiome (Faber et al., 2017, Nature Microbiology).

Other names

Salmonella gut nicheIntestinal colonization siteInflamed gut nicheSalmonella enterica serovar Typhimurium colonization niche

Therapeutic approaches target this niche through bactericidal action of antibiotics, competitive exclusion by probiotics, or experimental inhibition of specific metabolic pathways like tetrathionate respiration.