The Phage Hunters (IMAGE) University of Pittsburgh Caption Pitt biology professor Graham Hatfull, center, examines a culture of Mycobacterium smegmatis in his lab with high school students. Credit John Fedele 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.