Institution: | 1. Comparative Immunology Group, School of Biochemistry and Immunology, Trinity College, Dublin 2, Ireland;2. Animal & Grassland Research and Innovation Centre, Teagasc, Co. Meath, Ireland;3. UCD School of Veterinary Medicine, Dublin 4, Ireland;4. Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Pretoria 0014, South Africa |