Space Flight Virulence Study (IMAGE) Arizona State University Caption Biodesign Institute at Arizona State University researcher Cheryl Nickerson, Ph.D, led a multi-institutional effort that has shown that space flight alters bacterial gene expression and virulence. At her side is ground-based microgravity bioreactor, similar to those used to simulate bacterial growth conditions found in space. Credit Arizona State University 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.