1 Functional Microbiology, Department of Pathobiology, Institute of Microbiology, University of Veterinary Medicine, Vienna, Austria.
2 Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria.
3 Core Facility Multimodal Imaging, Faculty of Chemistry, University of Vienna, Vienna, Austria.
4 Functional Microbiology, Department of Pathobiology, Institute of Microbiology, University of Veterinary Medicine, Vienna, Austria. monika.ehling-schulz@vetmeduni.ac.at.