Outrunning Salmonella - the role of endogenous Enterobacteriaceae in variable colonization resistance.

The mammalian gut microbiota confers colonization resistance against pathogenic bacteria. Specific pathogen-free C57BL/6 mice from different vendors are variably resistant to oral non-typhoidal Salmonella infection. New work shows that differences in endogenous Enterobacteriaceae determine this phenotypic variability