Dr. Vanessa Sperandio (IMAGE) UT Southwestern Medical Center Caption Dr. Vanessa Sperandio, associate professor of microbiology and biochemistry, led research that uncovered a potential new way to stop the biochemical signals that cause bacteria in our bodies to release toxins. The team's investigation could provide a novel approach to combating illness. Credit UT Southwestern Medical Center Usage Restrictions Please use our credit line. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.