Salmonella-Infected Mast Cell (image) Duke University Medical Center Caption In this Salmonella-infected mast cell, the Salmonella are shown in red. The green areas are packages of signaling molecules harbored in mast cells. Following infection by Salmonella, mast cells are no longer able to release their pre-stored chemical signals. Credit Duke Medicine Usage Restrictions None 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.