Institution: | 1.Institute of Veterinary Pathology, Vetsuisse Faculty,University of Zurich,Zurich,Switzerland;2.Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Institute of Bacterial Infections and Zoonoses,Jena,Germany;3.Institute of Virology and Immunoprophylaxis,Mittelhaeusern,Switzerland;4.Laboratory of Biotechnology, Department of Microbiology,Hellenic Pasteur Institute,Athens,Greece |