'What Our Study Showed' (AUDIO) American Society for Microbiology Your browser does not support the audio element. Caption Maggie Monogue describes the findings of the research study. Credit American Society for Microbiology 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.