The overarching goal of project C2 (PIs Roeder, Rosenstiel) is to understand the long-lasting (memory) effects of undernutrition on the physiological host-microbial interplay in two different model organisms: Drosophila and mouse. Building on accumulated findings, the project aims to develop a mechanistic basis for interventions to ameliorate the sustained effects of severe protein-energy malnutrition (PEM) on organismal health. This includes exploring targeted manipulations of the microbiota and metabolic processes.