Macrophage (red fluorescent staining) (IMAGE) University of Illinois Chicago Caption Macrophage (red fluorescent staining) that has ingested bacteria (green fluorescence). Credit Rehman laboratory Usage Restrictions n/a 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.