Researchers (IMAGE) UT Southwestern Medical Center Caption Drs. Cody Ruhl, left, and Michael Shiloh assess data from a study that found bacteria that cause tuberculosis may facilitate their own spread by producing a molecule that triggers cough. Credit UTSW Usage Restrictions None 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.