Affiliation: | aOnderstepoort Veterinary Institute, Transboundary Animal Diseases Programme, Onderstepoort, South Africa;bDepartment of Microbiology and Plant Pathology, University of Pretoria, Pretoria, South Africa;cThe Pirbright Institute, Woking, United Kingdom;dINTA, Instituto de Virología, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Buenos Aires, Argentina |