Preface (M.C. Horzinek). Introduction (M.B. Pensaert). Authors. Abbreviations. DNA VIRUSES. Poxviridae. 1. Swinepox virus (H. Mahnel). African Swine Fever Virus Family. 2. African swine fever virus (P.J. Wilkinson). Herpesviridae. 3. Pseudorabies virus (Aujeszky's disease) (M.B. Pensaert, J.P. Kluge). 4. Porcine cytomegalovirus (N. Edington). Adenoviridae. 5. Porcine adenovirus (J.B. Derbyshire). Parvoviridae. 6. Porcine parvovirus (W.L. Mengeling). RNA VIRUSES. Reoviridae. 7. Porcine rotavirus (P. Debouck). Togaviridae and Flaviviridae. 8. Hog cholera virus (J.T. Van Oirschot, C. Terpstra). 9. Japanese encephalitis virus (H.S. Joo). Coronaviridae. 10. Transmissible gastroenteritis virus (classical enteric variant) and transmissible gastroenteritis virus (respiratory variant) (E.H. Bohl, M.B. Pensaert). 11. Porcine epidemic diarrhea virus (M.B. Pensaert). 12. Hemagglutinating encephalomyelitis virus (K. Andries). Toroviridae. 13. Porcine torovirus (M.C. Horzinek). Orthomyxoviridae. 14. Swine influenza virus (P.A. Bachmann). Rhabdoviridae. 15. Vesicular stomatitis virus (E.A. Carbrey). 16. Rabies virus (G.M. Baer). Picornaviridae. 17. Porcine enterovirus (polioencephalomyelitis) (J.B. Derbyshire). 18. Porcine enterovirus (reproductive disorders) (J.T. Wang, M.B. Pensaert). 19. Swine vesicular disease virus (R.S. Hedger, J.A. Mann). 20. Foot-and-mouth disease virus (J.A. Mann, R.F. Sellers). 21. Encephalomyocarditis virus (H.M. Acland). Caliciviridae. 22. Vesicular exanthema virus (S.H. Madin). Unclassified Viruses. 23. Congenital tremors virus (S.R. Bolin, C.A. Bolin). Subject Index.