Charles Scanga, Ph.D. (IMAGE) University of Pittsburgh Caption Dr. Charles Scanga, research associate professor in the University of Pittsburgh Department of Microbiology and Molecular Genetics Credit Charles Scanga Usage Restrictions For use only in reporting on this study License Original 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.