LUT on Il-1 Stained Cells (IMAGE) University of California - San Diego Caption Immune molecule IL-1beta (the "hot spots" shown here) senses bacterial infections. Credit UC San Diego Health Usage Restrictions Use photo credit 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.