This research investigates how the human microbiome protects against Streptococcus pneumoniae. Focusing on Streptococcus mitis, it shows how beneficial bacteria detect chemical signals from pathogens and block infection. Understanding when this microbial “security system” succeeds or fails may lead to new strategies for preventing disease.

This research explores how bacteria choose between free-swimming and biofilm lifestyles. Studying Vibrio cholerae reveals that bacterial populations hedge their bets—some cells disperse while others remain protected. This collective decision-making helps bacteria survive threats and plays a key role in infection and transmission.