Karen Guillemin, University of Oregon (IMAGE) University of Oregon Caption Karen Guillemin, a professor of biology at the University of Oregon, studies the development of the gastrointestinal system in zebra fish, with a focus on resident bacteria and their impacts. Credit Photo by Jim Barlow 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.