Bonnie Bassler On How Bacteria "Talk"

Susan notes: Thanks to TED for making TED Talks downloadable and embeddable, and for providing the biographical information that goes along with them.

Bonnie Bassler discovered that bacteria "talk" to each other, using a chemical language that lets them coordinate defense and mount attacks. The find has stunning implications for medicine, industry -- and our understanding of ourselves.

In 2002, bearing her microscope on a microbe that lives in the gut of fish, Bonnie Bassler isolated an elusive molecule called AI-2, and uncovered the mechanism behind mysterious behavior called quorum sensing -- or bacterial communication. She showed that bacterial chatter is hardly exceptional or anomolous behavior, as was once thought -- and in fact, most bacteria do it, and most do it all the time. (She calls the signaling molecules "bacterial Esperanto.")

The discovery shows how cell populations use chemical powwows to stage attacks, evade immune systems and forge slimy defenses called biofilms. For that, she's won a MacArthur "genius" grant -- and is giving new hope to frustrated pharmacos seeking new weapons against drug-resistant superbugs.

Bassler teaches molecular biology at Princeton, where she continues her years-long study of V. harveyi, one such social microbe that is mainly responsible for glow-in-the-dark sushi. She also teaches aerobics at the YMCA.