1. Swiss Federal Veterinary Office; PO Box 3003 Bern Switzerland
2. Institute Galli-Valerio; Rue César-Roux 37 1014 Lausanne Switzerland
3. Institute of Virology and Immunoprophylaxis; Sensemattstrasse 293 3147 Mittelhäusern Switzerland
4. Institute of Veterinary Bacteriology; Länggass-Strasse 122 3001 Bern Switzerland
5. OIE/FAO Brucellosis Reference Laboratory; French Food Safety Agency (AFSSA); 94706 Maisons-Alfort France