1. Department of Immunology‐Vaccinology, Faculty of Veterinary MedicineUniversity of LiègeBoulevard de Colonster, 20‐B43 bisB‐4000Sart Tilman‐LiègeBelgium
2. Department of Veterinary Clinical ScienceUniversity of LiverpoolPO Box 147LiverpoolL69 3BX
3. Belgian Zoonosis WorkgroupQueen Astrid HospitalB‐1120BrusselsBelgium
4. Department of Veterinary PathologyUniversity of LiverpoolPO Box 147LiverpoolL69 3BX
5. Department of Medical MicrobiologyUniversity of LiverpoolPO Box 147LiverpoolL69 3BX