I Immunoassay Techniques.- 1. Historical perspectives.- 2. Merits and disadvantages of different labels and methods of immunoassay.- 3. Assays utilizing red cells as markers.- 4. Particle counting immunoassay (PACIA): an automated non-radioisotopic immunoassay method, suitable for antigens, haptens, antibodies and immune complexes.- 5. Precipitation and related immunoassay techniques.- 6. Radioimmunoassay.- 7. Heterogeneous enzyme immunoassays.- 8. Immunoassays employing reactants labelled with a fluorophore.- 9. Chemiluminescence and its use in immunoassay.- 10. New homogeneous assay methods for the determination of proteins.- 11. Antisera in immunoassays with special reference to monoclonal antibodies to human immunoglobulins.- 12. External quality assessment schemes for immunoassays.- 13. The control of performance in immunoassays.- 14. Components in a model for the production of reference materials with special reference to immunoassays.- 15. Standardization of immunological reagents.- II Applications of Immunoassays.- 16. Steroid immunoassays in endocrinology.- 17. Immunoassays in pharmacology and toxicology.- 18. Immunoassays in autoimmune disease.- 19. Radioimmunoassays in allergy.- 20. Immunoassay screening for open neural-tube defects: practical aspects.- 21. Immunoassays in haematology.- 22. Immunoassays in tissue typing.- 23. Immunoassays for acute phase proteins.- 24. Rapid virus diagnosis.- 25. Viral hepatitis with special reference to hepatitis B.- 26. Immunoassays for hepatitis A.- 27. Immunoassays for the TORCH programme.- 28. Current status of specific IgM antibody assays.- 29. Enzyme immunoassays in bacteriology.- 30. Immunoassays in mycology.- 31. Some applications of immunoassays in tropical parasitic infections.- 32. Immunoassays in veterinary medicine.- 33. Immunoassays in plant virology.