A peptide produced by the skin bacterium Staphylococcus caprae, which does not lead to the serious infections that can result from its cousin S. aureus, was able to inhibit S. aureus colonization by inhibiting quorum sensing. Different bacterial species interact with each other in the human microbiome, and researchers from the University of Colorado at Denver hypothesized that benign Staphylococcus strains, which have received less attention than S. aureus because they do not lead to severe disease, might be able to influence the behavior of S. aureus.