<I>Francisella</I> (IMAGE) Duke University Caption This scanning electron micrograph shows a mouse immune cell (yellow) infected with Francisella tularensis bacteria (blue). Credit National Institute of Allergy and Infectious Disease. 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.