Neutrophils (IMAGE) University of Louisville Caption Confocal microscopy images taken in the Lawrenz lab of neutrophils (blue) and Yersinia pestis (red). UofL photo. Credit UofL photo. Usage Restrictions None. 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.