08 Dec 2015 --- The microbiota, the complex microbial community that we host in our gut, influences a number of different processes in our bodies, including metabolism and immunity. A change in the composition of the gut microbiota has been associated with a number of diseases. As we learn more about how these are linked, new possibilities arise for developing therapies based around restoring the composition of the microbial community to our benefit. But to be effective, we need to understand how these bacteria colonise our gut – something we know little about.