Bacteria in the intestine pack a wide spectrum of their biomolecules into small capsules. These are transported via the bloodstream to various organs in the body and even absorbed and processed by nerve cells in the brain. This has now been shown for the first time by a team of researchers from Goethe University, FAU (University of Erlangen-Nuremberg) and the University of California in San Francisco. The newly established research method will help to better understand the influence of intestinal bacteria on diseases and could support the development of innovative forms of drug or vaccine delivery.