Interspecies interactions induce exploratory motility in Pseudomonas aeruginosa

Area of Science:

• Microbiology
• Microbial Ecology
• Bacterial Interactions

Background:

• Microbes commonly form multispecies communities.
• Interspecies interactions significantly influence microbial behavior and environments.
• Understanding these interactions is crucial for fields like medicine and ecology.

Purpose of the Study:

• To develop a system for visualizing interspecies behaviors during initial encounters.
• To investigate the behavioral response of *Pseudomonas aeruginosa* to *Staphylococcus aureus*.
• To elucidate the mechanisms underlying *P. aeruginosa*'s response to *S. aureus*.

Main Methods:

• Development of a novel visualization system for microbial interactions.
• Co-culturing and imaging of *Pseudomonas aeruginosa* and *Staphylococcus aureus*.
• Analysis of bacterial motility, including speed, directionality, and surface behavior.

Main Results:

• *P. aeruginosa* modifies its surface motility in response to secreted factors from *S. aureus*.
• Upon sensing *S. aureus*, *P. aeruginosa* exhibits 'exploratory motility', characterized by increased speed and directedness.
• *P. aeruginosa* cells preferentially move towards *S. aureus* and invade its colonies using type IV pili.

Conclusions:

• This study reveals novel motility behaviors of *P. aeruginosa* in response to *S. aureus*.
• The findings provide insights into how *P. aeruginosa* senses and interacts with other microbial species.
• Harnessing these interspecies interactions may lead to new antimicrobial strategies.