(IMAGE) Instituto Gulbenkian de Ciencia Caption The adaptation process of gut bacteria is affected by the immune system of the host. Credit Roberto Keller (IGC). Usage Restrictions Credits should be given to the author of the image. 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.