MRSA micrograph (IMAGE) Michigan State University Caption Researchers at Michigan State have shown how bacteria like the MRSA cells shown here in purple can slip between biological environments. Credit National Institute of Allergy and Infectious Diseases Usage Restrictions No restrictions. License Public Domain 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.