Affiliation: | Department of Clinical Veterinary Science, University of Bristol, Langford House, Langford, BS 40 7 DU, UK.;Department of Pathology and Microbiology, University of Bristol, Langford House, Langford, BS 40 7 DU, UK.;Department of Clinical Veterinary Medicine, University of Bristol, Langford House, Langford, BS 40 7 DU, UK. |