VI International symposium on actinomycete biology: Debrecen, Hungary 26–30 August 1985 Organised by the Hungarian National Organizing Committee. Topics include: Taxonomy, Morphology and Ultrastructure, Genetics; Biochemistry; Secondary Metabolites, Pathogenicity and Immunology, Ecology and Epidemiology and Industrial Applications. Advisory Committee: K. Schaal (FGR), F. Bojalil (Mexico), M. Mordarski (Poland), J. Serrano (Venezuela) and H. Praueser (GDR) Free