biology

A new study led by Petra Levin in Arts & Sciences suggests that triclosan exposure may inadvertently drive bacteria into a state in which they are able to tolerate normally lethal concentrations of antibiotics — including those antibiotics that are commonly used to treat urinary tract infections.

New research from Washington University in St. Louis shows that honey bees (Apis mellifera) develop different scent profiles as they age, and the gatekeeper bees at the hive’s door respond differently to returning foragers than they do when they encounter younger bees who have never ventured out before.

Does this recent extreme cold snap spell bad news for mosquitoes and ticks this summer? Not necessarily. Researchers at Tyson Research Center, the environmental field station for Washington University in St. Louis, offer insight into how both insects are surviving the Polar Vortex that has gripped most of the Midwest and eastern United States.

Purple rice is a whole grain with high levels of antioxidants — and high levels of genetic diversity, thanks to traditional farming practices, according to new research from Washington University in St. Louis.

Washington University researchers have mapped the regions of the brain in mormyrid fish in extremely high detail. In a study published in the Nov. 15 issue of Current Biology, they report that the part of the brain called the cerebellum is bigger in members of this fish family compared to related fish — and this may be associated with their use of weak electric discharges to locate prey and to communicate with one another.

Keith Hengen, assistant professor of biology in Arts & Sciences at Washington University in St. Louis, was selected by the Allen Institute as a 2018 Next Generation Leader. Hengen is one of six early-career neuroscientists who will participate in a special advisory council for the Allen Institute for Brain Science.

David L. Kirk, former professor of biology in Arts & Sciences, died Nov. 1, 2018, in St. Louis after a long illness. He was 84. Kirk spent a lifetime teaching and researching developmental biology and, in retirement, worked to improve the way evolution is taught in K-12 schools.

New research by Karen DeMatteo, a biologist in Arts & Sciences, finds three alternative explanations beyond errors in handler or dog training that can explain why dogs trained to identify scat for conservation purposes sometimes collect non-target scats.

With a strong focus on community, the undergraduate pipeline program ENDURE at Washington University in St. Louis prepares students from diverse backgrounds for neuroscience doctoral programs.

Petra Levin, professor of biology in Arts & Sciences, was recently awarded a $2 million grant to identify and characterize the molecular circuits that coordinate or limit the growth and reproduction of bacteria.