The interest of the British research community in protozoa has in the past emphasized the parasitic organisms-especially those causing diseases of economic importance in Africa. The last 20 years have witnessed dramatic changes in protozoology, and the purpose of this meeting was to indicate the nature and significance of these changes.

Three areas were discussed. The first was our present understanding of protozoan diversity and the evolution of protozoa (by David Patterson), the second (by Bland Finlay) presented some novel and ecological important symbiotic relationships between protozoa and other microorganisms), and finally Graham Coombs discussed the problems still being posed by parasitic protozoa and the application of new technologies to those problems.