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Acknowledgements
I like to thank Prof. Silke Rautenschlein (Clinic for Poultry, University of Veterinary Medicine Hannover) for her expert supervision and the helpful contribution to the manuscripts.
Dr. Martin Ryll (Clinic for Poultry) helped to initiate the Riemerella project and gave me the opportunity to complete this work in his lab.
I am particularly grateful to Rita Leise (Clinic for Poultry) for her technical expertise and her friendly help throughout this project, especially in the more than two years after I had left Hannover. Without her this work would not have been completed, yet.
Prof. Johannes Knobloch (Institute of Medical Microbiology and Hygiene, University of Lübeck) gave me a helpful introduction into the use of MALDI-TOF MS bacterial fingerprinting and his analyses provided valuable contribution to the work of this thesis. Our cooperation was a real pleasure for me. I also like to thank his technician Justyna Bimschas for her technical assistance.
Dr. Helmut Hotzel (Institute of Bacterial Infections and Zoonoses, FLI Jena), Prof. Magne Bisgaard and Prof. Henrik Christensen (Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen) provided Riemerella sequences and phylogenetic analyses. In addition, Henrik Christensen´s experience with the mysteries of bacterial taxonomy offered an invaluable help for the preparation of the manuscript describing the new species Riemerella columbipharyngis.
I also like to thank Prof. Karl-Heinz Hinz (Clinic for Poultry) for helpful advice for the project and valuable discussions of the project.
Dr. Bernd Köhler (Ripac Labor GmbH, Potsdam) performed serotyping of some of our Riemerella isolates and kindly provided additional isolates from his own collection.
Further Riemerella isolates and diagnostic samples were provided by several colleagues, veterinary practitioners and diagnostic laboratories, namely by Lydia Teske and Dr. Arne Jung (Clinic for Poultry), Anicon Labor GmbH (Höltinghausen), Dr. Daniel Brandt (Dortmund),
Tierärztliche Praxis am Bergweg (Lohne), and Dr. Herrmann Block (Uelsen). I also like to thank all pigeon breeders, who allowed me to collect samples from their lofts.
I like to thank all my colleagues from the Clinic for Poultry and from the Department of Virology (University of Freiburg) for the pleasant working atmosphere, which I thoroughly enjoyed.
In particular I like to thank my family, who were always there to support me throughout the last years.