Macrophages Trapping TB Bacteria (IMAGE) The Francis Crick Institute Caption Macrophages (shown with blue nuclei) trap tuberculosis bacteria inside both tight and spacious phagosomes (red rings). Credit Laura Schnettger, Francis Crick Institute 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.