Welcome to the house-warming party: social interactions and antagonism against Listeria monocytogenes in multi-species biofilms.

Carnobacterium maltaromaticum significantly reduces Listeria monocytogenes cell counts by about 1 log CFU/cm² in multi-species biofilms, highlighting its antagonistic role.

• Why it matters: Understanding microbial interactions in biofilms is crucial for controlling pathogen persistence in food processing environments, yet the mechanisms remain largely unknown.
• What they did: The study analyzed six microbial communities with 5-19 strains, quantifying L. monocytogenes across various combinations, and identified key species influencing its survival and biofilm formation.
• The result: Findings suggest microbial communication and social interactions govern biofilm dynamics, offering insights for developing protective cultures to mitigate Listeria persistence, though mechanisms require further investigation.