Microbiome Sampling Pill Devices (IMAGE) Tufts University Caption The pill devices have a soft elastic exterior with sidewall inlets, which are triggered to open by pH levels in the small intestine environment. Elastic microvalves close the inlets once the intestinal microbiome content has been collected. Credit Sameer Sonkusale, Tufts University Nano Lab Usage Restrictions Use permitted in connection with reporting on the research presented in this study (Device Journal: Soft Autonomous Ingestible Device for Sampling the Small Intestinal Microbiome) License Original 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.