Science Friday

How Do Bacteria Talk To Each Other?

24 snips
Oct 27, 2025
In this engaging discussion, Dr. Bonnie Bassler, a renowned microbiologist from Princeton and recent National Medal of Science recipient, dives into the intriguing world of bacterial communication. She reveals how bacteria use chemical signals to 'talk' and form complex societal behaviors that remain largely unexplored. Bonnie explains the concept of quorum sensing as a means of reaching consensus among bacteria and shares fascinating insights on how these microbes can detect their environment and even outsmart hosts. Her passion for these tiny organisms shines through as she discusses their potential applications in fighting diseases by disrupting their communication.
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INSIGHT

Chemical Words Enable Bacterial Communication

  • Bacteria communicate using chemicals that act as words to convey information.
  • They use these molecules to count neighbors and decide behaviors based on group size.
INSIGHT

Quorum Sensing Triggers Group Actions

  • Quorum sensing lets bacteria switch behaviors when alone versus in groups.
  • They activate group-only tasks only when the chemical signal indicates sufficient numbers.
INSIGHT

Neighbors Shape Cooperative Versus Competitive Acts

  • Bacteria change behaviors depending on whether neighbors are related or competitors.
  • They share public goods with kin but withhold or attack when surrounded by foes.
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