Infected Macrophage (image) University of Basel Share Print E-Mail Caption This is an electron microscope image of a macrophage (blue) infected with Salmonella (red). Credit University of Basel, Biozentrum Usage Restrictions Please use with proper credit. Share Print E-Mail 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.