Staphylococcus epidermidis (IMAGE) University of Chicago Caption Staphylococcus epidermidis is a common bacteria found on skin. When mice were given skin transplants colonized with S. epi, they mounted an immune response against the bacteria as well as against the foreign tissue. 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.