1. Department of Companion Animals and Horses; University of Veterinary Medicine; Veterinaerplatz 1 Vienna 1210 Austria
2. Department of Pathobiology; University of Veterinary Medicine; Veterinaerplatz 1 Vienna 1210 Austria
3. Department of Biomedical Sciences; University of Veterinary Medicine; Veterinaerplatz 1 Vienna 1210 Austria
4. Department of Microbiology and Immunology; College of Medicine and Health Sciences; Sultan Qaboos University; Muscat Oman