Sources of Indoor Microbial Communities (IMAGE) Cell Press Caption This image shows the sources and physical processes that govern assembly of indoor microbial communities. Credit Peccia and Kwan/Trends in Microbiology 2016 Usage Restrictions Credit Required. 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.