1. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Jena, Germany
2. International Livestock Research Institute, Nairobi, Kenya
3. Central Veterinary Laboratory, Windhoek, Namibia
4. National Institute of Agrarian and Veterinary Research, INIAV, IP, Animal Health Unit, Lisbon, Portugal
5. Institute of Veterinary Bacteriology, University of Bern, Bern, Switzerland