List of authors; Preface; 1. Evolution and functions of the immune system A. J. S. Davies; Part I. Cellular Components of the Immune System: 2. Lymphocyte subpopulations in the mouse R. Scollay; 3. Definition of lymphocyte subpopulations in man P. C. L. Beverley; 4. Definition of lymphocyte populations in cattle using lectins C. Fossum; 5. Monoclonal antibodies to bovine leucocytes define heterogenicity of target cells for in vitro parasitosis by theileria parva P. A. Lalor, W. I. Morrison and S. J. Black; 6. Construction of a library of monoclonal antibodies for the analysis of the major histocompatibility gene complex and the immune system in ruminants W. C. Davis, L. E. Perryman and T. C. McGuire; Part II. The Major Histocompatibility Complex: 7. The human lymphocyte antigen system J. A. Sachs; 8. The bovine major histocompatibility complex R. L. Spooner; 9.Biochemical analysis of products of the bovine major histocompatibility complex D. Lévy, M. Hoang-Xuan and M. T. Zilber; 10. The role of the major histocompatibility complex in immune responses and susceptibility to disease R. V. Blanden; 11. The bovine major histocompatibility complex and disease resistance T. E. Adams and M. R. Brandon; Part III. Structural Organization and Ontogeny: 12. The lymphoid apparatus of the sheep and the recirculation of lymphocytes B. Morris N. C. Pedersen and W. Trevella; 13. Cellular constituents and structural organization of the bovine thymus and lymph node W. I. Morrison, P. A. Lalor, A. K. Christensen and P. Webster; 14. Ontogeny of immune responses in cattle B. I. Osburn; Part IV. Cellular Immune Responses: 15. Regualtory and effector cell interactions in immune responses R. N. Germain; 16. The analysis of the effects of lymphokines on cytotoxic T-cell responses M. A. Skinner, N. Christensen and J. Morbrook; 17. Bovine mixed leucocyte reactions and generation of cytotoxic cells B. M. Goddeeris, P. A. Lalor and W. I. Morrison; 18. Bovine alloreactive cytotoxic T cells A. J. Teale, W. I. Morrison, R. L. Spooner, B. M. Goddeeris, C. M. Groocock and D. A. Stagg; 19. Antibody-dependent cellular cytotoxicity and natural killer cell activity in cattle: mechanisms of recovery from infectious diseases M. P. Lawman, D. Gauntlett and F. Gallery; Part V. Humoral Immune Responses: 20. Structure and function of immunoglobulins: the symbiotic interplay between parasites and antibodies R. Hamers, W. van der Loo and P. De Baetselier; 21. Biological properties of bovine immunoglobulins and systemic antibody responses A. J. Musoke, F. R. Rurangirwa and V. M. Nantulya; 22. The physiology of secretory immunity J. G. Hall; 23. The mucosal immune system with particular reference to ruminant animals A. K. Lascelles, K. J. Beh, T. K. Mukkur and D. L. Watson; Part VI. Role of Immune Responses in Protection Against Infectious Diseases: 24. Effector mechanisms against viral infections L. D. Pearson and K. A. Knisley; 25. Immunogenicity of different physical forms of viral antigenic subunits B. Morein; 26. Mucosal mast cells, basophils, immediate hypersensitivity reactions and protection against gastrointestinal nematodes H. R. P. Miller; 27. Host responses which control Trypanosoma brucei parasites S. J. Black; 28. Studies on the protection of cattle against Babesia bovis infection D. F. Mahoney; 29. Protective immune responses in bovine theileriosis W. I. Morrison, D. L. Emery, A. J. Teale and B. M. Goddeeris.