Preface, M.C. Horzinek; introduction, J.B. McFerran and M.S. McNulty. Part 1 DNA viruses: poxviridae, poxvirus, D.M. Tripathy; herpes-viridae; infectious laryngotracheitis virus, F.T.W. Jordan; Marek's disease virus, P.C. Powell and L.N. Payne; duck plague virus, J.H.M. Richter; herpesvirus infections of pigeons, caged and wild birds, H. Vindevogel; hepadnaviridae, H. Will; adenoviridae, R.M. McCracken and B.M. Adair; papovaviridae; avian papovaviruses, A.D.M.E. Osterhaus; parvoviridae infection of chickens, J. Kisary; Derzsy's disease of geese, J. Kisary; avian adenovirus-associated virus, V.J. Yates and T.H. Piela-Smith; circovirus; chicken anaemia agent, N. Yuasa. Part 2 RNA viruses; reoviridae, M.S. McNulty; orbivirus; orbiviruses, P.A. Nuttall; ortavirus, M.S. McNulty; birnaviridae; infectious bursal disease, J.B. McFerran; togaviridae; toga-and flaviviruses, D.I.H. Simpson; flaviviridae; turkey meningo-encephalitis virus, M. Malkinson; coronaviridae; infectious bronchitis viridae, D. A. McMartin; infectious bronchitis - the disease in Australia, J.T. Faragher; coronaviral enteritis of turkeys, S.A. Nagi; orthomyxoviridae; orthomyxoviruses, D.J. Alexander; paramyxoviridae - paramyxovirus, D.J. Alexander; Newcastle disease virus, B. Kouwenhoven; paramyxovirus type 1 in piteons, H. Vindevogel; pneumovirus, (turkey rhinotracheitis and swollen head syndrome of chickens), D.J. Alexander; rhabdoviridae, G.R. Scott; bunyaviridae, J.S. Porterfield; retroviridae; avian leukosis/sarcoma viruses, L.N. Payne; reticuloendotheliosis virus in fowl, T.J. Bagust; tumor viruses of turkeys, J.S. McDougall and P. Biggs; picornaviridae; avian encephalomyelitis virus, B.W. Calnek; avian nephritis virus, T. Imada; duck hepatitis virus, B.W. Calnek; other avian enteroviruses, J.B. McFerran; astrovirus; astroviruses in ducks (duck hepatitis type II), R.E. Gough; astroviruses in turkeys, M.S. McNulty. Part 3 Unclassified viruses: haemorrhagic nephritis and enteritis of geese, J. Kisary; turkey viral hepatitis, J.B. McFerran. Part 4 Short reviews: the runting stunting syndrome - general assessment, M.S. McNulty; the pale bird (runting stunting) syndrome in the USA, P. Villegas; aetiology and diagnosis of respiratory disease in powl, G. Meulemans; aetiology of respiratory disease in pigeons, H. Vindevogel; aetiology and diagnosis of drops in egg production, G. Meulemans; a new disease of broiler breeders - big liver and spleen disease, W. Williams, et al; virus diseases of Japanese quail, N. Ratnamohan; specific pathogen-free (SPF poultry flocks - principles and pracices), J.T. Bagust; vaccination schedules used in various countries, M. Pattison, et al.