Microbial Communities (IMAGE) University of Basel Caption Microorganisms like these bacteria on the skin of a small crustacean are the constant companions of humans and animals. Researchers at the University of Basel were now able to show, that these microbial communities are dominated by species that are highly specialized to their host. Credit © University of Basel Usage Restrictions Give adequate attribution to original author 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.