Microbiome (IMAGE) University of Virginia Health System Caption The microbiome is the collection of microorganisms that live in and on us. New research from the University of Virginia School of Medicine suggests an unhealthy microbiome can promote the spread of breast cancer. Credit Alexandra Angelich | UVA Usage Restrictions May be used to accompany news coverage of Melanie Rutkowski's breast cancer discovery. ALL other uses require express written permission from UVA Health System. 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.