Proceedings of a final research co-ordination meeting, Mexico City, 24–28 June 1991. The purpose of the meeting was to present the results of the Co-ordinated Research Programme implemented in 1986. These findings established conclusively the potential for application of food irradiation in the control of liver flukes, tapeworms, roundworms, trichinosis, toxoplasmosis, etc. The summary report includes the conclusions and recommendations of the participating researchers.