RWTH Aachen University - Functional Microbiome Research Group, RWTH Aachen University - Functional Microbiome Research Group, RWTH Aachen University - Functional Microbiome Research Group, Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Hannover Medical School - Institute for Laboratory Animal Science, RWTH Aachen University - Functional Microbiome Research Group, RWTH Aachen University - Functional Microbiome Research Group, RWTH Aachen University Hospital - Institute of Molecular Medicine, University of Toronto, RWTH Aachen University - Functional Microbiome Research Group, Ludwig Maximilian University of Munich (LMU) - Medical Microbiology and Hospital Epidemiology, Ludwig Maximilian University of Munich (LMU) - Medical Microbiology and Hospital Epidemiology, RWTH Aachen University - Electron Microscopy Facility, Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Hannover Medical School - Institute for Laboratory Animal Science, RWTH Aachen University Hospital - Institute of Laboratory Animal Science, The University of Toronto - Department of Molecular Genetics, RWTH Aachen University - Experimental Molecular Imaging, RWTH Aachen University - Phage Biology Group, RWTH Aachen University Hospital - Neonatal Infection and Pathogenicity, RWTH Aachen University Hospital - Institute of Molecular Medicine, Ludwig Maximilian University of Munich (LMU) - Max von Pettenkofer-Institute, Helmholtz Center for Infection Research - Department of Microbial Immune Regulation, Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures and University Hospital of RWTH Aachen - Functional Microbiome Research Group